Engine Control Module Scan Tool Information. Pontiac G8 2008

For 1990-2009 cars only

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Engine Control Module Scan Tool Information V6

Table 1:	Engine Control Module Scan Tool Data
Table 2:	Engine Control Module (ECM) Scan Tool Output Controls

The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following is determined:

•	The Diagnostic System Check - Vehicle is completed.

•	No diagnostic trouble codes (DTCs)

•	On-board diagnostics are functioning properly

The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

Note: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis.

Engine Control Module Scan Tool Data

Parameter

System State

Expected Value

Description

Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop

5-volt Reference 1, 2, or 3 Circuit Status

This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.

A/C Disengage 1-8 History

A/C ON

Reason for A/C Disengagement

The parameter displays reason for the last 8 air conditioning (A/C) compressor disengagements in order from 1 to 8 with 8 being the most recent. There are 8 possible causes for the A/C compressor to disengage.

A/C High Side Pressure

A/C OFF

0.75-1.5 Volts*

This parameter displays the voltage signal from the A/C high side pressure sensor input to the control module.

* Varies with temperature, humidity, and altitude.

A/C ON

1.3-2.5 Volts*

A/C High Side Pressure

A/C OFF

450-827 kPa (65-120 psi)*

This parameter displays the pressure from the A/C high side pressure sensor signal circuit to the control module.

* Varies with temperature, humidity, and altitude.

A/C ON

827-2,350 kPa (120-341 psi)*

A/C Off for WOT

A/C ON

This parameter displays whether the control module is commanding the A/C compressor clutch relay off for wide open throttle (WOT).

A/C Pressure Disable

A/C ON

This parameter displays whether the A/C pressure is out of range for normal operation as determined by the control module.

A/C Relay Ckt Short Gnd Test Status

A/C ON or OFF

OK/Not Run

This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the A/C clutch relay control circuit is shorted to ground.

A/C Relay Ckt Open Test Status

A/C ON or OFF

OK/Not Run

A/C Relay Ckt Short Volts Test Status

A/C ON or OFF

OK/Not Run

A/C Relay Command

A/C ON

This parameter displays the state of the air conditioning (A/C) clutch relay control circuit as commanded by the control module.

A/C Request Signal

A/C ON

Yes

This parameter displays the state of the A/C request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls.

Actual Fuel Rail Pressure (If Equipped)

3.4-5.5 mPa (500-800 psi)

This parameter displays the Actual Fuel Rail Pressure in a range from 0 to 2900 psi.

Air Flow Calculated

g/s Varies

This parameter displays the air flow into the engine as calculated by the control module.

Ambient Air Temperature

°C °F Varies

This parameter displays the outside air temperature as calculated by the control module.

APP Indicated Angle

Accelerator pedal not actuated

This parameter displays the angle of the accelerator pedal position (APP) as calculated by the control module using the signals from the APP sensors.

Accelerator pedal fully actuated

100%

APP Sensor 1

Accelerator pedal not actuated

0.7-1.2 Volts

This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 1 signal circuit as measured by the control module.

Accelerator pedal fully actuated

4.2-4.5 Volts

APP Sensor 2

Accelerator pedal not actuated

0.3-0.5 Volts

This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 2 signal circuit as measured by the control module.

Accelerator pedal fully actuated

2.2-2.5 Volts

APP Sensor 1 and 2

Agree

This parameter displays Disagree if the control module detects the signal voltage from APP sensor 1 is not in correct relationship to APP sensor 2. The scan tool displays Agree under the normal operating conditions.

Aux. Coolant Pump Relay (If equipped)

On/Off

This parameter displays the state of the Auxiliary coolant pump relay control circuit.

Aux. Coolant Pump Relay Ckt Short Gnd Test Status (If equipped)

OK/Not Run

This parameter displays the state of the Auxiliary coolant pump relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the Auxiliary coolant pump relay control circuit is shorted to ground.

Aux. Coolant Pump Relay Ckt Open Test Status (If equipped)

OK/Not Run

Aux. Coolant Pump Relay Ckt Short Volts Test Status (If equipped)

OK/Not Run

Aux. Vac. Pump Relay Command (If equipped)

On/Off

This parameter displays the state of the Auxiliary Vacuum pump relay control circuit.

Aux. Vac Pump Relay Ckt Short Gnd Test Status (If equipped)

OK/Not Run

This parameter displays the state of the Auxiliary Vacuum pump relay control circuit. It can display OK, Fault or Not Run. The parameter displays Fault if the Auxiliary coolant pump relay control circuit is shorted to ground.

Aux. Vac Pump Relay Ckt Open Test Status (If equipped)

OK/Not Run

Aux. Vac Pump Relay Ckt Short Volts Test Status (If equipped)

OK/Not Run

Average Injector PWM

1 Ms

This parameter displays the average ON time of all the Injectors.

BARO

65-104 kPa (8-16 psi)

This parameter displays the barometric pressure. The control module uses the barometric pressure sensor input for fuel control to compensate for altitude differences.

BARO

2.5-4.0 Volts

This parameter displays the barometric pressure sensor voltage.

Brake Pedal Signal Status

Valid/Invalid

This parameter displays the serial data message of the brake signal from the electronic brake and traction control module (EBTCM).

Calculated ECT - Closed Loop Fuel Control

-39 to +60°C (-38 to +140°F)

This parameter displays the modeled temperature that the control module calculates from air entering the engine, coolant temperature, and ambient air temperature. If the actual engine coolant temperature does not reach this calculated temperature within a predetermined amount of time, a DTC will set.

Calculated ECT - Thermostat Diagnosis

40 to +95°C (104 to +203°F)

This parameter displays the modeled temperature that the control module calculates from the intake air temperature, the engine coolant temperature, and ambient air temperature. If the actual engine coolant temperature does not reach this calculated temperature within a predetermined amount of time, a DTC will set.

Calc. TWC Temp. Bank 1 and 2

C° F°

Varies

This parameter displays the catalytic converter temperature as calculated by the control module.

Catalytic Converter Protection Active

This parameter displays if the control module is commanding catalytic converter protection.

Catalyst Monitor Complete This Ignition

Yes

This parameter displays the monitor completion status during the current driving/monitoring cycle.

Catalyst Monitor Enabled this Ignition

Yes

This parameter displays the monitor enable status during the current driving/monitoring cycle.

CKP Active Counter

0-255 Counts

This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position sensor (CKP).

CKP Resync Counter

0 Counts

This parameter displays the number of times the control module has to resynchronize with the CKP sensor. The parameter will begin to increment if the control module does not detect a CKP reference pulse. The parameter will reset to 0 after the ignition is switched OFF.

Clutch Start Switch (If Equipped)

Clutch pedal not actuated

Off

This parameter displays the state of the clutch pedal as determined by the control module from the clutch start switch.

Clutch pedal fully actuated

CMP Sensor

0 RPM

This parameter displays the speed of the engine as calculated by the signal from a camshaft position (CMP) sensor. This parameter will always display 0 unless a condition with the CKP sensor or CKP reluctor exists. If a CKP condition exists the control module will use a valid CMP sensor signal to determine engine speed and crank/camshaft position.

Cold Startup

Yes/No

This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during the ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle.

Commanded A/F Equivalence Ratio

Varies

This parameter displays the ratio of air to fuel as calculated by the control module based on various sensor inputs. The scan tool will display a lower air fuel ratio when a richer air to fuel mixture is commanded. The scan tool will display a higher air fuel ratio when a leaner air to fuel mixture is commanded. In closed loop operation the air fuel ratio should normally be approximately 14.7 to 1.

Component Monitor Enable This Ignition

Yes

This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.

Control Module Voltage

14.25 volts

This parameter displays the state of the ignition system voltage available at the control module.

CPP Switch (If Equipped)

Clutch pedal not actuated

Released

This parameter displays the state of the clutch pedal as determined by the control module from the clutch pedal switch.

Clutch pedal fully actuated

Applied

Crank Request Signal

Ignition switch not in the crank position

This parameter displays whether the ignition switch has been cycled to the crank position requesting the control module to activate the starter relay.

Ignition switch in the crank position

Yes

Cruise Control Active

This parameter displays the status of the cruise control system as determined by the control module.

Cruise Disengage 1-8 History

Cruise ON

Reason for Cruise Disengagement

The parameter displays the last 8 cruise control disengages in order from 1 to 8, with 8 being the most recent. There are approximately 30 possible causes for the cruise control to disengage

Cruise Inhibited

Cruise ON

Yes

The parameter displays Yes until all of the conditions required to activate the cruise control system are met.

Cruise Inhibit Reason

Cruise OFF

OFF

The parameter displays the reason the cruise control system cannot engage.

Cruise ON

Park/Neutral

Cruise On/Off Switch

On/Off

The engine control module (ECM) monitors the signal circuit of the cruise control switch. A closed switch is displayed as On.

Cruise Resume/Accel. Switch

Active/Inactive

The scan tool displays On, when the cruise On/Off switch is ON and the resume/accel (+) button is pressed, the ECM detects a predetermined voltage value for the resume/accel. switch.

Cruise Set/Coast Switch

Active/Inactive

The scan tool displays On, when the cruise on/off switch is ON and the ECM detects a predetermined voltage value for the set/coast (-) switch.

Current Gear

Transmission in Park/Neutral

P/N

This parameter displays the transmission gear commanded by the transmission control module.

Transmission not in Park/Neutral

Reverse/1st-5th

Cycles of Misfire Data

0-3,000 counts

This parameter displays the number of cylinder firing events recorded by the control module.

Cyl. 1-6 IC Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is shorted to ground.

Cyl. 1-6 IC Ckt Open Test Status

OK/Not Run

This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is open.

Cyl. 1-6 IC Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the Ignition control circuit. The parameter displays Fault if the Ignition control circuit is shorted to voltage.

Cyl. 1-6 Inj. Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is shorted to ground.

Cyl. 1-6 Inj. Ckt Open Test Status

OK/Not Run

This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is open.

Cyl. 1-6 Inj. Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is shorted to voltage.

Cyl. 1-6 Knock Retard

0 Degrees

This parameter displays the knock retard as commanded by the control module for cylinders 1-6. Each cylinder is controlled individually based on both knock sensor signal inputs.

Decel. Fuel Cutoff

Inactive

This parameter displays the status of the operating mode of the control module used to turn off the fuel injectors and the EVAP canister purge valve during certain deceleration conditions.

Desired Exh. CMP Bank 1 or 2

Engine Idling

0 Degrees

This parameter displays the desired exhaust camshaft angle as commanded by the control module.

Engine speed at 2000 RPM

10 Degrees

Desired Fuel Rail Pressure (If Equipped)

Varies 3.4 mPa to 5.5 mPa ( 500 to 800 psi)

This parameter displays the desired Fuel Rail Pressure commanded by the control module.

Desired Idle Speed

Approximately 650 RPM

This parameter displays the desired engine idle speed as commanded by the control module. The desired idle speed varies depending on engine load.

Desired Int. CMP Bank 1 or 2

Engine Idling

0 Degrees

This parameter displays the desired intake camshaft angle as commanded by the control module.

Engine speed at 2000 RPM

10 Degrees

Distance Since DTC Cleared

0 Km/mi

This parameter displays in kilometers or miles the distance traveled since a DTC was cleared.

DTC Set This Ignition

This parameter displays Yes if a DTC set on the current ignition cycle.

EC Ignition Relay Command

This parameter displays the state of the control circuit for control module power relay as commanded by the control module.

EC Ignition Relay Feedback Signal

12.0-14.9 Volts

This parameter displays the voltage available at the EC ignition relay pin of the control module.

ECM in VTD Fail Enable

This parameter indicates whether or not the engine control module (ECM) is in failure enable mode for the vehicle theft deterrent (VTD) system.

ECT Sensor

88 to 105°C (190 to 221°F)

This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor.

Engine Load

Engine Idling

25-45%

This parameter displays the calculated engine load in percent based on inputs to the control module from various engine sensors.

Engine speed at 2,500 RPM

40-60%

Engine OFF EVAP Test Conditions Met

This parameter displays Yes if the conditions for running the Engine Off EVAP diagnostic are met.

Engine Off Time

Engine OFF

0:00:00 Seconds - Varies

This parameter displays the amount of time that has elapsed since the engine was last cycled OFF.

Engine Oil Level Switch

This parameter displays if the level of the engine oil is within range as determined by the control module from information received from the engine oil level switch.

Engine Oil Life Remaining

0-100%

This parameter displays the percent of engine oil life remaining. The controller calculates the engine oil life by monitoring engine load, coolant temperature, and engine speed.

Engine Oil Pressure Sensor (If Equipped)

103 kPa (15 psi) to 241 kPa (35 psi)

This parameter displays the engine oil pressure.

Engine Oil Temperature Calculated

Varies

The parameter displays the temperature of the engine oil as calculated by the control module using various sensor inputs.

Engine Run Time

Engine Operating

0:00:00

Increments when the engine is operating

This parameter displays the time elapsed since the engine was started.

Engine Speed

Engine Cranking

Greater than 60 RPM

This parameter displays the speed of the engine crankshaft rotation from information received from the crankshaft position (CKP) sensor. If there is a CKP sensor DTC, the ECM calculates the engine speed from one of the camshaft position (CMP) sensors.

Engine Idling

550-700 RPM

EVAP Fault History

No Fault

This parameter displays the result of the evaporative emission (EVAP) system as determined by the control module. The scan tool will display the following:

•

No Fault

•	Excess Vacuum

•	Purge Valve Leak

•	Small Leak

•	Weak Vacuum

•	No Test Result

EVAP Monitor Complete This Ignition

Yes/No

This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.

EVAP Monitor Enabled This Ignition

Yes/No

This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.

EVAP Purge Sol Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is shorted to ground.

EVAP Purge Sol Ckt Open Test Status

OK/Not Run

This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is open.

EVAP Purge Sol Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Fault if the EVAP purge solenoid control circuit is shorted to voltage.

EVAP Purge Solenoid Command

0-100%

This parameter displays the on-time or duty cycle of the EVAP canister purge solenoid commanded by the control module. Zero percent indicates no purge. One hundred percent indicates full purge.

EVAP Vent Sol Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Fault if the EVAP vent solenoid control circuit is shorted to ground. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON.

EVAP Vent Sol Ckt Open Test Status

OK/Not Run

This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Fault if the EVAP vent solenoid control circuit is open. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON.

EVAP Vent Sol Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Fault if the EVAP vent solenoid control circuit is shorted to voltage. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON.

EVAP Vent Solenoid Command

Venting

This parameter displays the state of the control circuit for evaporative emission (EVAP) vent solenoid as commanded by the control module.

Exh. CMP Angle Bank 1 or 2

Engine Idling

0 Degrees

This parameter displays the actual exhaust camshaft position in degrees.

Engine speed at 2000 RPM

10 Degrees

Exh. CMP Angle Bank 1 or 2 Variance

Engine Idling

0 Degrees

This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position.

Engine speed at 2000 RPM

0 Degrees

Exh. CMP Bank 1 or 2 Active Counter

0-255

This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position (CMP) sensor.

Exh. CMP Bank 1 or 2 Command

Engine Idling

20%

This parameter displays the on-time or duty cycle of the exhaust camshaft position (CMP) actuator solenoid valve as commanded by the control module.

Engine speed at 2000 RPM

50%

Exh CMP Sol Bn 1 or 2 Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground.

Exh CMP Sol Bn 1 or 2 Ckt Open Test Status

OK/Not Run

This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open.

Exh CMP Sol Bn 1 Ckt or 2 Short Volts Test Status

OK/Not Run

This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage.

Extended Travel Brake Pedal Switch

Released

This parameter will display the state of the brake pedal, applied or released.

FC Relay 1 Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to ground.

FC Relay 1 Ckt Open Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open.

FC Relay 1 Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to voltage.

FC Relays 2 and 3 Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to ground.

FC Relays 2 and 3 Ckt Open Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open.

FC Relays 2 and 3 Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is shorted to voltage.

FC Relay 1 Command

Varies

This parameter displays the commanded state of the fan relay 1 control circuit. The cooling fan relay 1 should be ON when the scan tool indicates the FC Relay 1 Command is ON. The cooling fan relay 1 should be OFF when the scan tool indicates the FC Relay 1` Command is OFF.

FC Relay 2 and 3 Command

Varies

This parameter displays the commanded state of the fan relay 2 and 3 control circuit. Cooling fan relays 2 and 3 should be ON when the scan tool indicates the FC Relay 2 and 3 Command is ON. Cooling fan relays 2 and 3 should be OFF when the scan tool indicates the FC Relay 2 and 3` Command is OFF.

Fuel Level Sensor

0-5 Volts

This parameter displays the voltage signal received by the control module from the fuel level sensor.

Fuel Level Sensor Left Tank (If Equipped)

0-5 Volts

This parameter displays the voltage signal received by the control module from the secondary fuel level sensor in the left side of the fuel tank.

Fuel Level Sensor Right Tank (If Equipped)

0-5 Volts

This parameter displays the voltage signal received by the control module from the primary fuel level sensor in the right side of the fuel tank.

Fuel Pump Relay Command

Ignition ON, engine OFF

Fuel pump on for 2 seconds

This parameter displays the control modules commanded state of the fuel pump relay control circuit. Or, the commanded state of the enable circuit for the fuel pump control module (FPCM), if equipped.

Engine idling

FRP Regulator Command (If Equipped)

130 to 135 Degrees

The scan tool displays in degrees, the FRP Regulator ON time as commanded by the control module.

Fuel Rail Pressure Sensor (If Equipped)

0 to 5 volts

This parameter displays the voltage signal received by the control module from the fuel rail pressure (FRP) sensor.

Fuel Tank Level Remaining

Liter/Gallon - Varies

This parameter displays the amount of fuel in liters/gallons that remains in the fuel tank as determined by the control module.

Fuel Tank Level Remaining

0-100%

This parameter displays the amount of fuel in the fuel tank in percent of range, as calculated by the control module.

Fuel Tank Pressure Sensor

Ignition ON, engine OFF

0 in H2O/mm Hg

This parameter displays the pressure/vacuum inside the fuel tank. A negative value indicates a vacuum, while a positive value indicates a pressure.

Fuel Tank Pressure Sensor

Ignition ON, engine OFF

0-5 Volts

This parameter displays the voltage signal received by the control module from the fuel tank pressure (FTP) sensor.

Fuel Tank Rated Capacity

Varies

This parameter displays the capacity of the fuel tank in liters or gallons. The rated capacity displayed by the scan tool will varies with vehicle type.

Fuel Trim Learn

Disabled

This parameter displays Enabled when conditions are appropriate for enabling long term fuel trim corrections. This indicates that the long term fuel trim is adapting continuing amounts of short term fuel trim. If the scan tool displays Disabled, then long term fuel trim will not respond to changes in short term fuel trim.

Fuel Volatility

Varies

This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.

GEN L-Terminal Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the generator L circuit terminal. The parameter displays Fault if the generator L circuit is shorted to ground.

GEN L-Terminal Ckt Open Test Status

OK/Not Run

This parameter displays the state of the generator L circuit terminal. The parameter displays Fault if the generator L circuit is open.

GEN L-Terminal Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the generator L circuit terminal. The parameter displays Fault if the generator L circuit is shorted to voltage.

GEN L-Terminal Signal Command

0-100%

This parameter displays the control modules commanded state of the voltage regulator on the generator.

Generator F-Terminal Signal

0-100%

This parameter displays the amount of generator on-time as commanded by the control module. The higher the percentage the greater the generator output.

HO2S Bank 1 or 2 Sensor 1

50-900 mV - Varies

This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust.

HO2S Bank 1 or 2 Sensor 2

400-700 mV - Varies

This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust.

HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is shorted to ground.

HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Open Test Status

OK/Not Run

This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is open.

HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Fault if the oxygen sensor heater control circuit is shorted to voltage.

HO2S Bank 1 or 2 Sensor 1 or 2 Heater Command

0-100%

This parameter displays the HO2S heater ON time in percentage, as commanded by the control module.

HO2S Bank 1 or 2 Sensor 1 or 2 Heater Command

ON/OFF

This parameter display the state of the HO2S heater control circuit as commanded by the control module.

HO2S/O2S Monitor Complete This Ignition

Yes/No

This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.

HO2S/O2S Monitor Enabled This Ignition

Yes/No

This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.

HO2S Sensing Element Bn. 1 or 2 Sensor 1

70-90 Ohms

Depends on Temperature

This parameter displays the resistance of the sensing element within the control module.

HO2S Sensing Element Bn. 1 or 2 Sensor 2

20-300 Ohms

Depends on Temperature

This parameter displays the resistance of the sensing element within the control module.

HO2S Bn. 1 or 2 Sensor 1 Module Signal

1-5 Volts

This parameter displays the voltage of the HO2S control transistor, which is internal to the ECM.

IAT Sensor

-39° to +140°C

(-38° to +284°F)

This parameter displays the temperature of the air entering the air induction system based on input to the control module from the intake air temperature (IAT) sensor.

Ignition Accessory Signal

This parameter displays On when the control module detects a voltage at the ignition accessory input terminal.

Ignition 0 Signal

This parameter displays On when the control module detects a voltage at the ignition 0 input terminal.

Ignition 1 Signal

B+

This parameter displays B+ when the control module detects a voltage at the ignition 1 input terminal.

Ignition 1 Signal

This parameter displays On when the control module detects a voltage at the ignition 1 input terminal.

IMT (IMRC) Ckt Short Gnd Test Status (If equipped)

OK/Not Run

This parameter displays the state of the intake manifold tuning (IMT) valve solenoid control circuit. The parameter displays Fault if the IMT Valve solenoid control circuit is shorted to ground.

IMT (IMRC) Ckt Open Test Status (If equipped)

OK/Not Run

This parameter displays the state of the intake manifold tuning (IMT) valve solenoid control circuit. The parameter displays Fault if the IMT Valve solenoid control circuit is open.

IMT (IMRC) Ckt Short Volts Test Status (If equipped)

OK/Not Run

This parameter displays the state of the intake manifold tuning (IMT) valve solenoid control circuit. The parameter displays Fault if the IMT Valve solenoid control circuit is shorted to voltage.

IMT (IMRC) Valve Solenoid Command (If equipped)

Off

This parameter displays the control modules commanded state of the IMT Valve solenoid.

Initial Brake Apply Signal

Brake pedal not actuated

Released

This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).

Brake pedal partially actuated

Applied

Injector 1-6 Command

Engine idling

0.82-1.50 ms

This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.

Injector 1-6 Disabled Due To Misfire

Engine idling

This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.

Int. CMP Angle Bank 1 or 2

Engine Idling

0 Degrees

This parameter displays the actual intake camshaft position in degrees.

Engine speed at 2000 RPM

10 Degrees

Int. CMP Angle Bank 1 or 2 Variance

Engine Idling

0 Degrees

This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position.

Engine speed at 2000 RPM

0 Degrees

Int. CMP Bank 1 or 2 Active Counter

0-255

This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor.

Int. CMP Bank 1 or 2 Command

Engine Idling

20 %

This parameter displays the on-time or duty cycle of the intake camshaft position (CMP) actuator solenoid valve as commanded by the control module.

Engine speed at 2000 RPM

50 %

Int CMP Sol Bn 1 or 2 Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to ground.

Int CMP Sol Bn 1 or 2 Ckt Open Test Status

OK/Not Run

This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open.

Int CMP Sol Bn 1 or 2 Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is shorted to voltage.

Knock Detected Cyl. 1-6

This parameter displays Yes if the control module detects an abnormal noise or detonation that is particular to an individual cylinder.

Knock Retard

0 Degrees

This parameter indicates the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensors.

KS Reference Bn 1 or 2

3-5 Volts

This parameter displays in voltage, the normal noise/vibration, learned by the control module.

KS 1 or 2 Signal

3.86-5.02 Volts

This parameters displays the voltage input to the control module from the knock sensor (KS).

Loop Status Bn 1 or 2 Sen. 1

Closed Loop

This parameter displays the state of the fuel control system as commanded by the control module. Closed Loop operation indicates that the control module is controlling the fuel delivery based off the oxygen sensors input signal. In Open Loop operation the control module ignores the oxygen sensor input signal and bases the amount of fuel to be delivered on other sensor inputs.

Loop Status Bn 1 or 2 Sen. 2

Open Loop

This parameter displays the state of the rear heated oxygen sensors as commanded by the control module. The rear sensors will not go into Closed Loop until the ECM determines that the HO2S is ready for operation.

Low EOP Indicator Command

Off

This parameter displays the commanded state of the low EOP lamp control circuit by the control module.

Long Term FT Bank 1 or 2

This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for cruise and acceleration conditions.

LT FT Bn. 1 or Bn. 2 Idle/Decel

This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for idle and deceleration conditions.

MAF Sensor

Engine Idling

3.0-8.3 g/s

This parameter displays in grams per second, the measured quantity of air flowing into the engine during all operating conditions.

Engine speed at 2,500 RPM

11.88 g/s

MAF Sensor

Engine Idling

2,000-2,500 Hz

The scan tool displays a range of 0-65,555 hertz. This parameter displays the frequency signal input to the control module, and represents measured quantity of air flowing into the engine during all operating conditions.

MIL Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is shorted to ground.

MIL Ckt Open Test Status

OK/Not Run

This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is open.

MIL Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is shorted to voltage.

MIL Command

Off

This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module.

Mil Requested by DTC

This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs.

Mileage Since DTC Cleared

km - miles

This parameter displays the mileage that has elapsed since any diagnostic trouble code (DTC) has been cleared from the control modules memory.

Mileage Since DTC First Failure

km - miles

This parameter displays the mileage that has elapsed since the first emission failure.

Mileage Since DTC Last Failure

km - miles

This parameter displays the mileage that has elapsed since the last emission failure.

Mileage Since MIL Requested

km - miles

This parameter displays the mileage that has elapsed since the control module has commanded the malfunction indicator lamp (MIL) On.

Misfire Current Cyl. 1-6

The scan tool displays a range of 0-255 counts. This parameter displays the number of misfires that have been detected during the last 255 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.

Misfire History Cyl. 1-6

The scan tool displays a range of 0-65,535 counts. The misfire history counters display the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire DTC P0300 has become active. The misfire history counters will update every 255 cylinder firing events.

Moderate Brake Apply Signal

Brake pedal not actuated

Released

This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).

Brake pedal fully actuated

Applied

PNP Switch

Transmission in Park/Neutral

Park/Neutral

This parameter displays whether the transmission range selector is in park/neutral or in gear.

Transmission not in Park/Neutral

In Gear

Post Inj. Cyl. 1-6 Command

0 ms

This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module for catalyst heating.

Power Enrichment

Inactive

This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions.

Reduced Engine Power

Inactive

This parameter displays Active if the control module is commanding reduced engine power due to a throttle actuator control (TAC) system condition.

RVS Disable 1-8 History

Reason for RVS Disable

These parameters displays the last eight reasons the control module disabled remote vehicle start (RVS).

Short Term FT Bank 1 or Bank 2

-5% to +5%

This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor 1 or 2. If the oxygen sensor indicates a lean air/fuel mixture, the control module will add fuel increasing the short term fuel trim above 0. If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce fuel decreasing the short term fuel trim below 0.

Spark

2-10 Degrees

This parameter displays the amount of spark advance the control module is commanding on the ignition control circuits. The control module determines the desired advance.

Starter Relay Ckt Short Gnd Test Status

OK/Not Run

This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is shorted to ground.

This parameter may not change if the scan tool is used to command the relay control circuit ON.

Starter Relay Ckt Open Test Status

OK/Not Run

This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is open.

This parameter may not change if the scan tool is used to command the relay control circuit ON.

Starter Relay Ckt Short Volts Test Status

OK/Not Run

This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is shorted to voltage.

This parameter may not change if the scan tool is used to command the relay control circuit ON.

Starter Relay Command

Ignition switch not in the crank position

Off

This parameter indicates whether the control module is commanding the starter relay to go on or off.

Ignition switch in the crank position

Start Up ECT

-39° to +140°C (-38° to +284°F)

This parameter displays the temperature of the engine coolant on start up based on input to the control module from the ECT sensor.

Start Up IAT

-39° to +140°C (-38° to +284°F)

This parameter displays the temperature of the intake air at start in the air induction system based on input to the control module from the IAT sensor.

Stoplamp Pedal Switch

Brake pedal not actuated

Released

This parameter displays the position of the stop lamp pedal switch input to the control module.

Brake pedal fully actuated

Applied

System Power Mode

Run

This parameter displays the position of the ignition switch. The scan tool will display the following:

•

Accessory

•

Crank

•

Off/Awake

•

Run

TAC Forced Engine Shutdown

This parameter indicates the status of the TAC motor by the control module. The scan tool will display Yes if the engine has been shut down due to a throttle control fault.

TAC Motor

Enabled

This parameter indicates the status of the throttle actuator control (TAC) motor driver in the control module. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display Disabled if the control module detects a condition that affects TAC motor operation.

TAC System Learned Counts

0-11

This parameter displays the steps counted in learning the throttle actuator control parameters. The last step learned is 11.

TCC Status

Unlocked

This parameter displays the commanded status of the torque convertor clutch.

TCM Requested Torque

N·m/lb ft

This parameter displays the calculated amount torque requested of the controller.

TCM Torque Increase

This parameter displays whether or not the controller has responded to a request for a torque increase.

TCS Torque Increase

This parameter displays whether or not the controller has responded to a request for a torque increase.

TCS Torque Reduction Active

This parameter displays whether the transmission control module (TCM) is reducing torque.

TCM Torque Reduction Active

This parameter displays whether EBTCM has determined a reduction in torque took place.

TCS Torque Delivered Signal

0-100%

This is the calculated torque output from the engine to the transmission used by the EBTCM for the traction control system operation.

TCS Torque Request Signal

0-100%

The EBTCM sends a Desired Torque Level signal request to the control module. This decreases torque from the powertrain in order to reduce wheel slip during acceleration for the traction control.

Total Fuel Trim Avg. Bank 1 or Bank 2

-100 to +100%

This parameter displays the overall fuel trim from the Long Term idle/decel parameter and the Long Term Fuel Trim cell.

Total Knock Retard

0°

This parameter displays how much ignition spark timing is being retarded due to all control systems monitored by the control module.

Total Misfire Count

This parameter displays the total number of cylinder firing events that the control module detected as misfires for the last 200 crankshaft revolution sample period.

TP Desired Angle

0-100%

This parameter displays the desired TP angle commanded by the control module.

TP Indicated Angle

0-100%

This parameter displays the percent of throttle opening as calculated by the control module using the inputs from TP sensors 1 and 2.

TP Sensor 1

3.7-4.3 Volts

This parameter displays the actual voltage on the TP sensor 1 signal circuit as measured by the control module.

TP Sensor 1 Learned Minimum

4.1-4.7 Volts

This parameter displays the learned minimum value of throttle position (TP) sensor 1 as recorded by the control module during the last learn procedure.

TP Sensor 2

0.7-1.1 Volts

This parameter displays the actual voltage on the TP sensor 2 signal circuit as measured by the control module.

TP Sensor 2 Learned Minimum

0.5-0.9 Volts

This parameter displays the learned minimum value of TP sensor 2 as recorded by the control module during the last learn procedure.

TP Sensors 1 and 2

Agree

This parameter displays Disagree when the control module detects that TP sensor 1 voltage signal is not within the correct relationship to TP sensor 2. The scan tool displays Agree under the normal operating conditions.

Traction Control Status

Inactive

This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control.

Trans. Output Speed Signal

0 RPM

This parameter contains the Replicated Transmission Output Speed (Replicated TOS) received from the Transmission Control Module. Replicated TOS results from hardware in the TCM that re-transmits the Transmission Output Speed Sensor pulses to the ECM.

Vehicle Security Status

Fuel Continued

This parameter displays the status of the vehicle theft deterrent system.

Vehicle Speed Sensor

Km/h

mph

This parameter displays the speed of the vehicle as calculated by the transmission control module (TCM) from information received from the vehicle speed sensor (VSS).

Volumetric Efficiency

Engine Idling

5-25%

This parameter displays the calculated volumetric efficiency of the engine as calculated by the control module.

Engine speed at 2,500 RPM

5-25%

VTD Auto. Learn Timer

Inactive

This parameter indicates that either the auto learn timer (used in the auto learn procedure to enable VTD password learning) or the seed and key timer (used in the seed and key procedure to enable VTD password learning) is active.

VTD Fuel Disable

Inactive

This parameter indicates the VTD system has disabled fuel.

VTD Fuel Enabled

YES

This parameter indicates that the VTD system has enabled the fuel system.

VTD Fuel Disable Until Ign. Off

This parameter indicates the VTD system has disabled fuel for the remainder of the ignition cycle.

VTD Password learned

YES

This indicates learning of the VTD password received from the platform electronics is enabled. VTD password learning is first enabled in assembly plant (prior to the manufacturer’s enable counter being set to zero) may be re-enabled using 1 of 2 procedures.

Warm Ups Since DTC Cleared

Counts

This parameter indicates the number of warm up cycles that have occurred Since DTCs were cleared. The scan tool will display a higher counts as more warm up cycles have occurred since the DTCs were cleared.

Wide Open Throttle

This parameter displays the throttle status commanded by the control module. The scan tool will display YES if the vehicle throttle is commanded to 100 percent.

Engine Control Module (ECM) Scan Tool Output Controls

Output Control

Description

A/C Relay

The engine must be running and the ECM must receive an A/C request from the HVAC control module in order to enable the output control. The ECM de-energizes the A/C compressor clutch relay when OFF is selected. The relay remains de-energized until ON is selected.

Auxiliary Coolant Pump Relay (If Equipped)

This function controls the auxiliary coolant pump relay. The normal commanded state is NONE. When commanded ON/OFF, the control module turns the auxiliary coolant pump relay ON and OFF. The scan tool initiates the test when the following conditions are met:

•	The ignition is ON with the engine OFF.

•	No engine speed is detected.

The system remains in the commanded state until cancelled by the scan tool.

Aux. Vac. Pump (If Equipped)

This function controls the brake booster auxiliary vacuum pump. The normal commanded state is NONE. When commanded ON/OFF, the control module turns the auxiliary vacuum pump ON and OFF. The scan tool initiates the test when the following conditions are met:

•	The ignition is ON with the engine OFF.

•	No engine speed is detected.

The system remains in the commanded state until cancelled by the scan tool.

CMP Actuator Intake/Exhaust Bank 1 or Bank 2

This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 40 crankshaft degrees. The scan tool initiates the test when the following conditions are met:

•	The vehicle speed is 0 km/h (0 mph).

•	The transmission is in park or neutral.

•	The engine speed is between 1,000-1,400 RPM.

The system remains in the commanded state until cancelled by the scan tool.

CMP Sol. Intake/Exhaust Bank 1 or Bank 2

This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:

•	The ignition is ON with the engine OFF.

•	No engine speed is detected.

The system remains in the commanded state until cancelled by the scan tool.

Cooling Fan Relay 1

This function activates the cooling fan relay 1. The normal commanded state of the fan relay is NONE. The relay command status can also be monitored on the scan tool data parameter FC Relay 1 Command. The control module allows cooling fan relay control when the following conditions are met:.

•	The ignition is ON or the engine is running

•	A/C compressor operation is not requested.

•	The engine coolant temperature is less than 106°C (224°F)

Cooling Fan Relay 2 & 3

This function activates the cooling fan relay 2 and relay 3. The normal commanded state of the fan relays is NONE. The relay command status can also be monitored on the scan tool data parameter FC Relay 2 and 3 Command. The control module allows cooling fan relay control when the following conditions are met:

•	The ignition is ON or the engine is running

•	A/C compressor operation is not requested.

•	The engine coolant temperature is less than 106°C (224°F).

Cooling Fan Relay 1, 2 & 3

This function activates the cooling fan relay 1, 2 and 3. The normal commanded state of the fan relays is NONE. The relay command status can also be monitored on the scan tool data parameters FC Relay 1 Command and FC Relay 2 and 3 Command. The control module allows cooling fan relay control when the following conditions are met:

•	The ignition is ON or the engine is running

•	A/C compressor operation is not requested.

•	The engine coolant temperature is less than 106°C (224°F).

Cylinder Power Balance

Note: The Misfire Current and Misfire History parameters may not increment when using this function.

This function disables the selected fuel injector. The normal commanded state is None. The scan tool initiates the test when the following conditions are met:

•	The engine is operating and the engine idle is stable.

•	The vehicle speed is 0 km/h (0 mph).

•	There are no DTCs set for the vehicle speed sensor.

If the fuel injector was disabled for 30 seconds, fuel injector control is not allowed again on the same fuel injector for 60 seconds.

Engine Speed Control

This function controls the idle speed override in 25 RPM, 100 RPM, and 500 RPM increments, from the base idle speed to 1,400 RPM. The scan tool initiates the test when the following conditions are met:

•	The transmission is in park or neutral.

•	The engine speed is less than 1,000 RPM.

The engine speed will remain in the commanded state until cancelled by the scan tool.

EVAP Purge Solenoid

Note: The EVAP Purge Solenoid Command parameter may not change states when using this output control.

This function controls the evaporative emission (EVAP) purge solenoid valve. The normal commanded state is NONE. The system will increase or decrease the amount of purge by changing the duty cycle of the purge valve in 10 percent increments within a range of 0-100 percent. The system remains in the commanded state until cancelled by the scan tool or the fuel tank pressure (FTP) sensor exceeds -24 mm Hg (-12 inch H20).

EVAP Purge/Seal

Note: The EVAP Purge and Vent Solenoid Command parameters may not change states when using this output control.

This function activates both the EVAP purge solenoid valve and EVAP vent solenoid to seal the EVAP system. When activated, the purge valve is commanded to 0 percent and the vent valve is commanded ON, Not-venting. The normal commanded state for both solenoids is None. Both of the solenoids remain in the commanded state until cancelled by the scan tool or the FTP sensor exceeds -24 mm Hg (-12 inch H20).

EVAP Vent Solenoid

Note: The EVAP Vent Solenoid Command parameter may not change states when using this output control.

This function controls the EVAP vent solenoid. The normal commanded state is NONE. When commanded ON, the vent valve switches to Not-venting. The system remains in the commanded state unless one of the following conditions occur:

•	Cancelled by the scan tool

•	The EVAP canister purge solenoid is more than 0 percent, and the FTP sensor exceeds -24 mm Hg (-12 inch H20).

Fuel Injector Balance Test ( If Available)

This function enables the fuel injector in order to verify the correct fuel injector flow. The ECM will pulse the selected fuel injector when the following conditions are met:

•	All instruction on the scan tool is complete.

•	A fuel injector is selected.

•	The ignition is ON with the engine OFF.

The selected fuel injector can only be flowed/pulsed once per ignition cycle.

Fuel Pressure Control

This function allows control of the fuel rail pressure (FRP) regulator which is integral to the high pressure fuel pump. The system will Increase or Decrease the fuel rail pressure in increments, as commanded within an approximate range of 414-17,237 kPa (60-2500 psi). The scan tool initiates the test when the following conditions are met:

•	The engine is operating

•	The ignition voltage is 10-18 volts

•	The vehicle speed is 0 mph

•	DTC P0700 is not set

The system remains in the commanded state for about 30 seconds or until cancelled by the scan tool or the ECM detects a vehicle speed.

Fuel Pump Relay (If Equipped)

This function controls the fuel pump relay. The normal commanded state is NONE. The scan tool initiates the test when the following conditions are met:

•	There are no vehicle speed sensor DTCs set.

•	The vehicle speed is 0 km/h (0 mph).

When commanded ON/OFF, the engine control module (ECM) turns the fuel pump relay ON/OFF. If the engine is running and the fuel pump relay is commanded OFF, the engine will stall. The system remains in the commanded state for about 2 seconds or until cancelled by the scan tool or the ECM detects a vehicle speed.

Fuel Trim Enable

This function disables the control modules ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool.

Fuel Trim Reset

This function is used to reset the learned fuel trim values to their initial values.

Generator L-Terminal

Commands the generator L terminal On and Off.

Idle Learn Reset

This function allows the throttle position and the idle speed to be relearned by the ECM, once the following conditions have been met.

•	The ignition is ON with the engine OFF.

•	The ECT is between 5-85°C (41-185°F).

•	No throttle actuator control (TAC) system DTCs are set.

Idle Spark

Disables and enables idle spark advance with the engine running.

IMT (IMRC) Valve Solenoid (If Equipped)

This function controls the intake manifold tuning valve (IMT) valve solenoid. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the IMRC solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:

•	There are no vehicle speed sensor DTCs set.

•	The vehicle speed is 0 km/h (0 mph).

The system remains in the commanded state until cancelled by the scan tool.

Loop Status

This function controls the heated oxygen sensor (HO2S) loop status. The commanded states include NONE, OPEN, and CLOSED. The normal commanded state is NONE. The loop status changes as commanded, OPEN or CLOSED.

The system remains in the commanded state until cancelled by the scan tool.

Malfunction Indicator Lamp

This function controls the malfunction indicator lamp (MIL). The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the MIL ON/OFF. The system remains in the commanded state until cancelled by the scan tool.

Oil Life Reset

This output control is used to reset the engine oil life monitor from 0 to 100%.

RVS Disable History Reset

This function clears the remote vehicle start (RVS) disable history. When RESET is selected the reason the control module did not allow RVS in the last 8 attempts is cleared.

Starter Relay (If Available)

Commands the starter relay ON and OFF.

Throttle Blade Control

This function controls the throttle valve in 10 percent increments. The scan tool initiates the test when the following conditions are met:

•	There are no vehicle speed sensor DTCs set.

•	The vehicle speed is 0 km/h (0 mph).

•	The ignition is ON, with the engine OFF.

•	The ECM is not commanding a throttle learn.

The system remains in the commanded state until cancelled by the scan tool.

Engine Control Module Scan Tool Information 6.0L Engine

Table 1:

Engine Control Module Scan Tool Output Controls

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A parameter may appear in any one of the data lists and in some cases may appear more than once or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following conditions are determined:

•	The Diagnostic System Check - Vehicle is completed.

•	There are no diagnostic trouble codes (DTCs).

•	The on-board diagnostics are functioning correctly.

Scan tool values from an engine that is operating correctly may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents the values that would be seen on a normal operating engine.

Important: Do not use a scan tool that displays faulty data. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool may result in mis-diagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service information for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls .

Engine Control Module Scan Tool Data Parameters

Parameter	Operating Conditions	Expected Value	Definition
Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories Off
5 Volt Reference 1	--	Volts	This parameter displays the voltage sensed on the 5 volt reference 1 at the engine control module.
5 Volt Reference 2	--	Volts	This parameter displays the voltage sensed on the 5 volt reference 2 circuit at the control module.
5 Volt Reference 1 Circuit Status	--	OK	This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5 Volt Reference 1 Circuit Status	--	Fault
5 Volt Reference 2 Circuit Status	--	OK	This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5 Volt Reference 2 Circuit Status	--	Fault
A/C Disengagement 1st History	--	None	This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot.
A/C Disengagement 2nd History	--	None
A/C Disengagement 3rd History	--	None
A/C Disengagement 4th History	--	None
A/C Disengagement 5th History	--	None
A/C Disengagement 6th History	--	None
A/C Disengagement 7th History	--	None
A/C Disengagement 8th History	--	None
A/C Off for WOT (Air Conditioning)	--	Yes	This parameter indicates if the A/C system was commanded off for a wide open throttle event.
A/C Off for WOT (Air Conditioning)	--	No
A/C High Side Pressure Sensor	--	0 - 3,450 kPa	This parameter displays the pressure from the A/C high side pressure sensor signal circuit to the control module.
A/C High Side Pressure Sensor	--	0 - 5 Volts	The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor.
A/C Pressure Disable	--	Yes	The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi).
A/C Pressure Disable	--	No
A/C Relay Circuit Status	--	OK	This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Fault if a diagnosis has not been made.
	--	Fault
	--	Incomplete
A/C Relay Command	--	On	The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor relay.
A/C Relay Command	--	Off
A/C Request Signal (Air Conditioning)	--	Yes	The scan tool displays Yes or No. Yes is displayed when the HVAC control module is requesting A/C operation.
A/C Request Signal (Air Conditioning)	--	No
Air Flow Calculated	--	g/s	This parameter displays the air flow of the engine as calculated by the engine control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s).
Ambient Air Temperature	--	°C	This parameter displays the ambient, outside, air temperature as calculated by the engine control module.
APP Indicated Angle	--	0 - 100 %	This parameter displays the angle of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
APP Sensors	--	Counts	This parameter displays the average of the APP sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in counts.
APP Sensor 1 (Accelerator Pedal Position)	--	Volts	This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
APP Sensor 1 Indicated Position (Accelerator Pedal Position)	--	0 - 100 %	This parameter displays the angle of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
APP Sensor 2 (Accelerator Pedal Position)	--	Volts	This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
APP Sensor 2 Indicated Position (Accelerator Pedal Position)	--	0 - 100 %	This parameter displays the angle of the accelerator pedal position (APP) sensor 1 as calculated by the engine control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not pressed to a high percentage when the accelerator pedal is fully pressed.
APP Sensors 1 and 2	--	Agree	This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2 . The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions.
APP Sensors 1 and 2	--	Disagree
BARO (Barometric Pressure)	--	kPa	This parameter displays the voltage signal received by the control module from the manifold absolute pressure (MAP) sensor measured when the ignition is turned on with the engine not running. The control module will update the barometric pressure during wide-open throttle (WOT) conditions. The scan tool will display a low value when the barometric pressure is low, and a high value when the barometric pressure is high.
BPP Circuit Signal	--	Applied	This parameter displays the state of the brake pedal position circuit signal as determined by the brake pedal switch. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed.
BPP Circuit Signal	--	Released
BPP Signal	--	Applied	This parameter displays the state of the brake pedal position signal as determined by the brake pedal switch. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed.
BPP Signal	--	Released
Calculated TWC Temperature Bank 1	--	[ordm ]C	Calculated catalytic converter temperature
Calculated TWC Temperature Bank 2	--	[ordm ]C	Calculated catalytic converter temperature
Catalytic Converter Protection	--	Active	This parameter indicates the status of the control module control for catalytic converter protection. The scan tool will indicate Active if the control module is adjusting fuel and ignition quantity and timing to protect the catalytic converter from damage. The scan tool will indicate Inactive if the control module is in a normal fuel and ignition control mode.
Catalytic Converter Protection	--	Inactive
Change Engine Oil Indicator Command	--	On	This parameter displays a low engine oil life remaining and requires an oil change. This notice is calculated by the engine control module based on many inputs. The oil change symbol on indicates the next oil change will be required
Change Engine Oil Indicator Command	--	Off
CMP Active Counter	--	Counts	This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor.
CMP Sensor	--	RPM	This parameter displays the speed of the engine as calculated by the signal from the camshaft position (CMP) sensor
CKP Active Counter	--	Counts	This parameter displays an incrementing counter when the engine control module receives a signal from the crankshaft position (CKP) sensor.
CKP Resync Counter	--	Counts	This parameter displays the number of times the engine control module re-syncs with the crankshaft position (CKP) sensor.
CKP Sensor	--	RPM	This parameter displays the engine speed as calculated by the engine control module using the signal form the crankshaft position (CKP) sensor.
Cold Start Up	--	Yes	This parameter indicates whether the engine meets the conditions for a cold start-up during the present ignition cycle. The scan tool displays Yes when the conditions for a cold start-up are met during this ignition cycle. The scan tool displays No when the conditions for a cold start-up are not met during the present ignition cycle. Conditions for a cold start-up require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle.
Cold Start Up	--	No
CPP Switch (If equipped)	--	Applied	This parameter displays the current state of the clutch pedal position as determined by the control module.
CPP Switch (If equipped)	--	Released
Crank Request Signal	--	Yes	This parameter displays whether the ignition switch has been cycled to the crank position requesting the control module to activate the starter relay.
Crank Request Signal	--	No
Cruise On/Off Switch	--	On	This parameter displays the status of the cruise control system as determined by the engine control module. The scan tool will display On when the cruise control system is in control of vehicle speed. The scan tool will display Off when the cruise control system is not operating.
Cruise On/Off Switch	--	Off
Cruise Control Active	--	Active	This parameter displays the status of the cruise control system as determined by the engine control module. The scan tool will display Active when the cruise control system is in control of vehicle speed. The scan tool will display Inactive when the cruise control system is not operating.
Cruise Control Active	--	Inactive
Cruise Disengage 1st History	--	None	The parameter displays the last 8 cruise control disengages in order from 1 to 8, with 8 being the most recent. There are about 33 possible causes for the cruise control to disengage.
Cruise Disengage 2nd History	--	None
Cruise Disengage 3rd History	--	None
Cruise Disengage 4th History	--	None
Cruise Disengage 5th History	--	None
Cruise Disengage 6th History	--	None
Cruise Disengage 7th History	--	None
Cruise Disengage 8th History	--	None
Cruise Resume/Accel Switch	--	Active	This parameter displays the status of the cruise resume/acceleration switch.
Cruise Resume/Accel Switch	--	Inactive
Cruise Set/Coast Switch	--	Active	This parameter displays the status of the cruise set/deceleration switch.
Cruise Set/Coast Switch	--	Inactive
Cycles of Misfire Data	--	Counts	This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the engine control module.
Cylinder 1 Deactivate Solenoid Command	--	Yes	This parameter displays Yes when V4 mode is commanded or OFF when V8 mode is commanded
Cylinder 1 Deactivate Solenoid Command	--	No
Cylinder 1 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 1 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 2 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 2 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 3 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 3 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 4 Deactivate Solenoid Command	--	Yes	This parameter displays Yes when V4 mode is commanded or OFF when V8 mode is commanded
Cylinder 4 Deactivate Solenoid Command	--	No
Cylinder 4 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 4 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 5 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 5 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 6 Deactivate Solenoid Command	--	Yes	This parameter displays Yes when V4 mode is commanded or OFF when V8 mode is commanded
Cylinder 6 Deactivate Solenoid Command	--	No
Cylinder 6 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 6 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 7 Deactivate Solenoid Command	--	Yes	This parameter displays Yes when V4 mode is commanded or OFF when V8 mode is commanded
Cylinder 7 Deactivate Solenoid Command	--	No
Cylinder 7 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 7 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
Cylinder 8 Ignition Control Circuit Status	--	Okay	This parameter displays the state of the ignition control circuit. The parameter displays Fault if the ignition control circuit is open, short to ground, or short to voltage. This parameter displays incomplete until the engine control circuit has been commanded on.
	--	Fault
	--	Incomplete
Cylinder 8 Injector Circuit Status	--	Okay	This parameter displays the status of the output driver for the injector control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Failed
	--	Incomplete
Cylinder Deactivation Cycle	--	Counts	This parameter displays the number of times the engine switches between V8 mode, and V4 mode during each ignition cycle. The counter will reset to zero and increment again, if the count reaches 255 during the current ignition cycle.
Cylinder Deactivation Disable 1 History	--	None	The parameter displays the last 8 cylinder deactivation disable in order from 1 to 8, with 8 being the most recent.
Cylinder Deactivation Disable 2 History	--	None
Cylinder Deactivation Disable 3 History	--	None
Cylinder Deactivation Disable 4 History	--	None
Cylinder Deactivation Disable 5 History	--	None
Cylinder Deactivation Disable 6 History	--	None
Cylinder Deactivation Disable 7 History	--	None
Cylinder Deactivation Disable 8 History	--	None
Cylinder Deactivation Performance Test	--	OK	This parameter displays OK if all the Active Fuel Management enabling conditions are met. The parameter displays Fault if one or more enabling conditions are out of range.
Cylinder Deactivation System Command	--	Active	This parameter displays V8 when all four Active Fuel Management (AFM) cylinder solenoids are deactivated or V4 when the AFM cylinder solenoids are activated.
Cylinder Deactivation System Command	--	Inactive
Dec. Fuel Cutoff (Deceleration)	--	Active	This parameter displays the status of the operating mode of the engine control module used to turn off the fuel injectors and the evaporative emission (EVAP) canister purge valve during certain deceleration conditions.
Dec. Fuel Cutoff (Deceleration)	--	Inactive
Desired Idle Speed	--	1144 RPM	This parameter displays the desired engine idle speed as commanded by the engine control module.
Distance Since DTC Cleared	--	Km	This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven.
Distance with Cylinder Deactivated	--	Km	This parameter displays the distance accumulated since an cylinder was deactivated. The scan tool will display increasing distance as the vehicle is driven.
Distance with Cylinder Activated	--	Km	This parameter displays the distance accumulated since an cylinder was activated. The scan tool will display increasing distance as the vehicle is driven.
EC Ignition Relay Circuit Status	--	Okay	This parameter displays the status of the output driver for the EC Ignition Relay control circuit. The scan tool will display Okay, Incomplete and Failed. The scan tool will display Okay if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
EC Ignition Relay Command	--	On	This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module.
EC Ignition Relay Command	--	Off
EC Ignition Relay Feedback Signal	--	Volts	This parameter displays the voltage available at the EC ignition relay pin of the engine control module.
ECM in VTD Fail Enable	--	Yes	The scan tool displays Yes or No. The scan tool displays Yes if the body control module (BCM) and the Engine control module lose communications with each other after the BCM sends the correct password. The scan tool displays No if the BCM is communicating the correct password to the ECM.
ECM in VTD Fail Enable	--	No
ECT Sensor	--	[ordm ]C	This parameter displays the engine coolant temperature as calculated by the engine control module.
Engine Load	--	0 - 100 %	This parameter displays the calculated engine load in percent based on inputs to the engine control module from various engine sensors.
Engine Off Time	--	hh:mm:ss	This parameter displays the time elapsed since the engine was switched off. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero as soon as the engine starts running.
Engine Oil Level Switch (If equipped)	--	OK	This parameter displays the state of the engine oil level switch as determined by the control module. The scan tool will display OK or Low. OK indicates that the engine oil level is not too low for safe operation of the engine. Low indicates the engine oil level is abnormally low and has closed the engine oil level switch.
Engine Oil Level Switch (If equipped)	--	Low
Engine Oil Life Remaining	--	0 - 100 %	This parameter displays the percent of engine oil life remaining. The controller calculates the engine oil life by monitoring engine load, coolant temperature, and engine speed.
Engine Oil Pressure (EOP) Sensor	--	kPa	This parameter displays the engine oil pressure.
Engine Oil Pressure Switch	--	OK	This parameter displays the state of the EOP as determined by the control module. The control module monitors the EOP switch to determine if the EOP is sufficient. The scan tool will display low when the EOP is below a predetermined value.
Engine Oil Pressure Switch	--	Low
Engine Oil Temperature	--	[ordm ] C	This parameter displays the temperature of the engine oil.
Engine Oil Temperature Calculated	--	[ordm ] C	This parameter displays the temperature of the engine oil as calculated by the engine control module.
Engine Run Time	--	hh:mm:ss	This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero as soon as the engine stops running.
Engine Speed	--	RPM	This parameter displays the speed of the crankshaft as calculated by the control module based on inputs from the Crankshaft Position (CKP) Sensor. The scan tool will display the engine speed in revolutions per minute (RPM).
EVAP Fault History	--	No Fault	This parameter displays the result of the evaporative emission (EVAP) system diagnostic as determined by the control module. The scan tool will display various messages, depending on the result of the test.
EVAP Purge Solenoid Circuit Status	--	Okay	This parameter displays the diagnostic state of the output driver for the evaporative emission purge solenoid control circuit as determined by the control module. The scan tool will display OK if the circuit is operating correctly. The scan tool will display the appropriate fault if there is an open, short to ground or a short to voltage on the circuit. The scan tool will display Incomplete if the diagnostic has not completed.
	--	Fault
	--	Incomplete
EVAP Purge Solenoid Command (Evaporative Emission)	--	0 - 100 %	This parameter displays the commanded state of the EVAP purge solenoid control circuit. The scan tool will display 0-100%. A high value indicates the purge solenoid control circuit is being commanded more by the control module, opening the EVAP purge solenoid. A low value indicates the purge solenoid is being commanded on less by the control module.
EVAP Vent Solenoid Circuit Status	--	Okay	This parameter displays the diagnostic state of the output driver for the evaporative emission vent solenoid control circuit as determined by the control module. The scan tool will display OK if the circuit is operating correctly. The scan tool will display the appropriate fault if there is an open, short to ground or a short to voltage on the circuit. The scan tool will display Incomplete if the diagnostic has not completed.
	--	Fault
	--	Incomplete
EVAP Vent Solenoid Command	--	Venting	This parameter displays the commanded state of the EVAP vent solenoid control circuit. The scan tool will display venting or not venting. Not venting indicates the purge solenoid control circuit is being commanded ON by the control module, closing the EVAP vent solenoid. Venting indicates the vent solenoid is not being commanded by the control module, allowing the solenoid to remain open.
EVAP Vent Solenoid Command	--	Not Venting
Ext. Travel BPP Signal	--	Applied	This parameter displays Applied, Released, or Invalid. A state of Applied indicates the brake pedal position sensor has traveled beyond a moderate, extended threshold as determined by the brake sensing module and received over serial data.
Ext. Travel BPP Signal	--	Released
FC Circuit Short Ground Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
	--	Fault
	--	Not Run
FC Circuit Open Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
	--	Fault
	--	Not Run
FC Circuit Short Volts Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
	--	Fault
	--	Not Run
FC Circuit Status	--	OK	This parameter displays OK, Fault or Incomplete. This indicates the state of the FC Circuit.
	--	Fault
	--	Incomplete
FC Relay 1 Command	--	On	This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM.
FC Relay 1 Command	--	Off
FC Relay 1 Circuit Short Volts Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
	--	Fault
	--	Not Run
FC Relay 1 Circuit Short Ground Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
	--	Fault
	--	Not Run
FC Relay 1 Circuit Open Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
	--	Fault
	--	Not Run
FC Relay 2 and 3 Command	--	On	This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM.
FC Relay 2 and 3 Command	--	Off
FC Relay 2 and 3 Circuit Short Ground Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay 2 & 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit
	--	Fault
	--	Not Run
FC Relay 2 and 3 Circuit Open Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay 2 & 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
	--	Fault
	--	Not Run
FC Relay Circuit Short Volts Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
	--	Fault
	--	Not Run
FC Relay Circuit Open Test Status	--	OK	This parameter displays the status of the output driver for the fan control relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
	--	Fault
	--	Not Run
Fuel Level Sensor Right Tank	--	Volts	This parameter displays the voltage from the signal produced by the sensor used to monitor the fuel level inside the fuel tank. The scan tool will display a low voltage reading when the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full.
Fuel Level Sensor Left Tank	--	Volts	This parameter displays the voltage from the signal produced by the sensor used to monitor the fuel level inside the fuel tank. The scan tool will display a low voltage reading when the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full.
Fuel Pump Relay Command	--	On	This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be On when the scan tool indicates the fuel pump relay command is On. The fuel pump relay should be Off when the scan tool indicates the fuel pump relay command is Off.
Fuel Pump Relay Command	--	Off
Fuel Pump Relay Circuit Status	--	Okay	This parameter displays the state of the fuel pump relay control circuit. The parameter displays Fault if the fuel pump relay control circuit is open, short to ground, or short to voltage. The parameter displays Indeterminate until the circuit has been commanded on.
	--	Failed
	--	Incomplete
Fuel Tank Level Remaining	--	0 - 100 %	This parameter displays the amount of fuel remaining in tall of the fuel tanks of the vehicle as a percentage. The control module calculates this level using the signals from the sensors used to monitor the fuel level in the fuel tanks. The scan tool will display a low reading when the total fuel level in the vehicle is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full.
Fuel Tank Pressure Sensor	--	mmHg	This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high.
Fuel Tank Pressure Sensor	--	Volts	This parameter displays the voltage signal sent to the control module from the sensor used to monitor the pressure inside the fuel tank. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low or in a vacuum.
Fuel Tank Rated Capacity	--	72.9 Litres	The scan tool displays Litres or gallons. This parameter displays the fuel tank capacity as determined by the calibrations of the vehicle.
Fuel Trim Cell	--	Index	This parameter displays the fuel trim cell as calculated by the control module based on many sensor inputs. The fuel trim cell indicates which cell is currently active.
Fuel Trim Learn	--	Enable	The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled. If the scan tool displays Disabled, then long term fuel trim will not respond to changes in short term fuel trim.
Fuel Trim Learn	--	Disable
Fuel Volatility	--	Low	This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.
Fuel Volatility	--	High
GEN L-Terminal Command	--	0 - 100 %	This parameter displays the commanded state of the generator by the engine control module. The percentage indicates the capacity in which the generator is commanded to operate at by the engine control module.
GEN L-Terminal Circuit Status	--	OK	This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short on the circuit.
	--	Fault
	--	Incomplete
GEN F-Terminal Signal	--	0 - 100 %	This parameter displays the commanded state of the generator by the control module. A High value indicates a high charging command, and a low value indicates a low charging command.
HO2S Bank 1 Sensor 1	--	mV	This parameter displays the voltage from the signal produced by the heated oxygen sensor used to monitor fuel trim for cylinder bank 1. The scan tool will display a low voltage reading when that cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running rich.
HO2S Bank 1 Sensor 1 Heater	--	Amperes	This parameter displays the current through the control module when the bank 1 sensor 1 O2 heater is commanded ON by the control module. O2 Heater Bank 1 Sensor 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S Bank 1 Sensor 1 Heater Command	--	0 - 100 %	This parameter displays the commanded state of the heater control circuit for oxygen bank 1 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off.
HO2S Bank 1 Sensor 1 Heater Command	--	On	This parameter displays the commanded state of the bank 1 sensor 1 heater by the engine control module. The scan tool will display On when the heater is commanded on. The scan tool will display Off when the heater is commanded off.
HO2S Bank 1 Sensor 1 Heater Command	--	Off
HO2S Bank 1 Sensor 2	--	mV	This parameter displays the voltage from the signal produced by the heated oxygen sensor used to monitor fuel trim for cylinder bank 1. The scan tool will display a low voltage reading when that cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running rich.
HO2S Bank 1 Sensor 2 Heater	--	Amperes	This parameter displays the current through the control module when the bank 1 sensor 2 O2 heater is commanded ON by the control module. O2 Heater Bank 1 Sensor 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S Bank 1 Sensor 2 Heater Command	--	0 - 100 %	This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON.
HO2S Bank 1 Sensor 2 Heater Command	--	On	This parameter displays the commanded state of the bank 1 sensor 2 heater by the engine control module. The scan tool will display On when the heater is commanded on. The scan tool will display Off when the heater is commanded off.
HO2S Bank 1 Sensor 2 Heater Command	--	Off
HO2S Bank 2 Sensor 1	--	mV	This parameter displays the voltage from the signal produced by the heated oxygen sensor used to monitor fuel trim for cylinder bank 2. The scan tool will display a low voltage reading when that cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running rich.
HO2S Bank 2 Sensor 1 Heater	--	Amperes	This parameter displays the current through the control module when the bank 2 sensor 1 O2 heater is commanded ON by the control module. O2 Heater Bank 2 Sensor 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S Bank 2 Sensor 1 Heater Command	--	0 - 100 %	This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off.
HO2S Bank 2 Sensor 1 Heater Command	--	On	This parameter displays the commanded state of the bank 2 sensor 1 heater by the engine control module. The scan tool will display On when the heater is commanded on. The scan tool will display Off when the heater is commanded off.
HO2S Bank 2 Sensor 1 Heater Command	--	Off
HO2S Bank 2 Sensor 2	--	mV	This parameter displays the voltage from the signal produced by the heated oxygen sensor used to monitor fuel trim for cylinder bank 2. The scan tool will display a low voltage reading when that cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running rich.
HO2S Bank 2 Sensor 2 Heater	--	Amperes	This parameter displays the current through the control module when the bank 2 sensor 2 O2 heater is commanded ON by the control module. O2 Heater Bank 2 Sensor 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S Bank 2 Sensor 2 Heater Command	--	0 - 100 %	This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 2. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off.
HO2S Bank 2 Sensor 2 Heater Command	--	On	This parameter displays the commanded state of the bank 2 sensor 2 heater by the engine control module. The scan tool will display On when the heater is commanded on. The scan tool will display Off when the heater is commanded off.
HO2S Bank 2 Sensor 2 Heater Command	--	Off
Hot Open Loop	--	Inactive	This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally.
Hot Open Loop	--	Active
IAT Sensor	--	[ordm ]C/F	This parameter displays the temperature of the intake air calculated by the engine control module based on the input from the intake air temperature (IAT). The scan tool will display a low value for a low intake air temperature, and a high value for a high intake air temperature.
Ignition Accessory Signal	Ignition is in ACC position	On	This parameter displays the state of the ignition input to the control module from the ignition switch. The scan tool will display On when the ignition switch is in the ignition accessory position. The scan tool will display Off when the ignition switch is in any other position.
Ignition Accessory Signal	Ignition is in OFF/RUN/CRANK position	Off
Ignition 1 Signal	--	Volts	This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position. The scan tool will display a higher value with a higher system voltage, and a lower value with a lower system voltage.
Injector 1 Disabled Due to Misfire	--	Yes	This parameter displays the status of the fuel injector driver by the engine control module. The scan tool will display Yes if the fuel injector is being disabled due to a misfire detection. The scan tool will display No if the fuel injector is not being disabled by the engine control module due to a misfire.
Injector 1 Disabled Due to Misfire	--	No
Injector 2 Disabled Due to Misfire	--	Yes
Injector 2 Disabled Due to Misfire	--	No
Injector 3 Disabled Due to Misfire	--	Yes
Injector 3 Disabled Due to Misfire	--	No
Injector 4 Disabled Due to Misfire	--	Yes
Injector 4 Disabled Due to Misfire	--	No
Injector 5 Disabled Due to Misfire	--	Yes
Injector 5 Disabled Due to Misfire	--	No
Injector 6 Disabled Due to Misfire	--	Yes
Injector 6 Disabled Due to Misfire	--	No
Injector 7 Disabled Due to Misfire	--	Yes
Injector 7 Disabled Due to Misfire	--	No
Injector 8 Disabled Due to Misfire	--	Yes
Injector 8 Disabled Due to Misfire	--	No
Injector PWM Bank 1	--	ms	The scan tool displays in milliseconds. This parameter is the average time the control module turns on each fuel injector on that bank. The scan tool will display a higher value with a longer pulse width, or a lower value with a shorter pulse width.
Injector PWM Bank 2	--	ms	The scan tool displays in milliseconds. This parameter is the average time the control module turns on each fuel injector on that bank. The scan tool will display a higher value with a longer pulse width, or a lower value with a shorter pulse width.
Intake Manifold Pressure	--	kPa	This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or low load cruising.
Knock Detected Cylinder 1	--	Yes	This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display Yes if a knock condition has been detected related to that cylinder combustion event. The scan tool will display No if there is no knock condition detected related to that cylinder combustion event.
Knock Detected Cylinder 1	--	No
Knock Detected Cylinder 2	--	Yes
Knock Detected Cylinder 2	--	No
Knock Detected Cylinder 3	--	Yes
Knock Detected Cylinder 3	--	No
Knock Detected Cylinder 4	--	Yes
Knock Detected Cylinder 4	--	No
Knock Detected Cylinder 5	--	Yes
Knock Detected Cylinder 5	--	No
Knock Detected Cylinder 6	--	Yes
Knock Detected Cylinder 6	--	No
Knock Detected Cylinder 7	--	Yes
Knock Detected Cylinder 7	--	No
Knock Detected Cylinder 8	--	Yes
Knock Detected Cylinder 8	--	No
Knock Retard	--	°	The scan tool displays in ° (degrees). This parameter indicates the amount of timing retard commanded by the control module. The scan tool will display a lower value if no knock is detected, and a higher value as more knock is detected and the control module retards the ignition timing.
Long Term Fuel Trim Bank 1	--	%	The scan tool displays in %. This parameter is the long term fuel trim for this bank as calculated by the engine control module. The scan tool will display more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0 indicating time is being subtracted from the injector pulse width, reducing the amount fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.
Long Term Fuel Trim Bank 2	--	%	The scan tool displays in %. This parameter is the long term fuel trim for this bank as calculated by the engine control module. The scan tool will display of more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0 indicating time is being subtracted from the injector pulse width, reducing the amount fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.
Loop Status	--	Open	The scan tool displays Open or Closed. The scan tool displays Closed if the engine control module is controlling the fuel delivery according to the heated oxygen sensor (HO2S) voltages. The scan tool displays Open if the engine control module is not adjusting for the HO2S inputs. In the Open loop the engine control module bases fuel delivery on the throttle position and the mass airflow sensor inputs.
Loop Status	--	Closed
Low EOP Indicator Command (Engine Oil Pressure)	--	On	This parameter displays the commanded state of the low engine oil pressure lamp control circuit by the engine control module. The scan tool will display On if the lamp is commanded On by the engine control module. The scan tool will display Off if the lamp is not being commanded by the engine control module.
Low EOP Indicator Command (Engine Oil Pressure)	--	Off
Low Engine Oil Level Indicator Command	--	On	This parameter displays the commanded state of the low engine oil level lamp control circuit by the engine control module. The scan tool will display On if the lamp is commanded On by the control module. The scan tool will display Off if the lamp is not being commanded by the engine control module.
Low Engine Oil Level Indicator Command	--	Off
MAF Sensor	--	g/s	The scan tool displays g/s. This parameter indicates the airflow into the engine as calculated by the engine control module based on mass airflow (MAF) sensor inputs. The scan tool will display a high value at higher engine speeds, and a low value at idle.
MAP Sensor	--	kPa	The scan tool displays kPa. This parameter displays the pressure inside of the intake manifold as calculated by the engine control module based on the input from the MAP sensor. The scan tool will display a high value at cruising speed or wide open throttle (WOT). The scan tool will display a low value at idle speed.
MIL Circuit Status	--	OK	This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display Okay, Fault or Incomplete. The scan tool will display Pass/Fail if the circuit is operating correctly. The scan tool will display Incomplete if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
MIL Command	--	On	This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit. The malfunction indicator lamp should be On when the scan tool indicates the MIL Command is on. The malfunction indicator lamp should be Off when the scan tool indicates the MIL Command is off. The engine control module will command the MIL On when the ignition is on with the engine off in order to perform a bulb check.
MIL Command	--	Off
MIL Requested by DTC	--	Yes	This parameter indicates the reason the control module illuminated the MIL. The scan tool will display Yes when the MIL is requested as a result of an A or B type DTC. The scan tool will display No if the MIL is illuminated for another reason, such as transmission DTCs.
MIL Requested by DTC	--	No
Misfire Current Cylinder 1	--	(#)	The scan tool will display in counts. This parameter indicates the number of cylinder firing events detected as possible misfires on each cylinder during the last 200 crankshaft revolutions as calculated by the engine control module. The scan tool will display a low number for a low number of cylinder misfire events. The scan tool will display a high number for a high number of cylinder misfire events.
Misfire Current Cylinder 2	--	(#)
Misfire Current Cylinder 3	--	(#)
Misfire Current Cylinder 4	--	(#)
Misfire Current Cylinder 5	--	(#)
Misfire Current Cylinder 6	--	(#)
Misfire Current Cylinder 7	--	(#)
Misfire Current Cylinder 8	--	(#)
Misfire History Cylinder 1	--	(#)	The scan tool displays in counts. This parameter displays the total level of cylinder misfires that have been calculated for each cylinder by the engine control module. This parameter will not update or show activity until a misfire DTC has become active. The misfire history counters will update every 200 cylinder firing events.
Misfire History Cylinder 2	--	(#)
Misfire History Cylinder 3	--	(#)
Misfire History Cylinder 4	--	(#)
Misfire History Cylinder 5	--	(#)
Misfire History Cylinder 6	--	(#)
Misfire History Cylinder 7	--	(#)
Misfire History Cylinder 8	--	(#)
Output Shaft Speed Sensor	--	RPM	This parameter displays the rotational speed of the transmission output shaft. The scan tool displays output shaft speed as revolutions per minute (RPM).
PNP Switch (If equipped)	Gear selector is in Park position	P/N	The scan tool displays the position of the transmission selection as Park/Neutral or In Gear.
	Gear selector is in Reverse position	In Gear
	Gear selector is in Neutral position	P/N
	Gear selector is in Drive position	In Gear
Power Enrichment	--	Active	Scan tool displays Active or Inactive. Active displayed indicates that the engine control module has detected conditions appropriate to operate in power enrichment mode. The engine control module commands power enrichment mode when a large increase in throttle position and load is detected. While in power enrichment, the engine control module will increase the amount of fuel delivered by entering open loop and increasing the injector pulse width.
Power Enrichment	--	Inactive
Reduced Engine Power	--	Active	The scan tool displays Active or Inactive. The scan tool displays Active when the engine control module receives a signal from the throttle actuator control (TAC) module that a TAC system fault is occurring. The scan tool displays inactive when the engine is operating normally.
Reduced Engine Power	--	Inactive
Remote Vehicle Start (RVS) Disable 1-8 History		None	These parameters show the last 8 reasons the ECM disabled remote vehicle start (RVS). Reason 1 is the most current reason.
Remote Vehicle Start (RVS) Request Signal		Off	This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode.
Remote Vehicle Start (RVS) Request Signal		On
Skip Shift Lamp Command (If equipped)	--	On
Skip Shift Lamp Command (If equipped)	--	Off
Spark	--	° CA	This parameter is the desired spark advance calculated by the control module based on many sensor inputs. The scan tool will display a lower value at idle speed, and a higher value under heavy acceleration and load conditions.
Short Term Fuel Trim Bank 1	--	%	The scan tool displays percentage. This parameter indicates the current short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.
Short Term Fuel Trim Bank 2	--	%	The scan tool displays percentage. This parameter indicates the current short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.
Start-Up ECT	--	° C	This parameter indicates the engine coolant temperature at start-up, as calculated by the engine control module based on the input from the engine coolant temperature sensor. The scan tool will display a higher value at higher engine start-up temperatures, and a lower value at lower start-up temperatures.
Start-Up IAT	--	° C	Indicates the intake air temperature (IAT) at the time that the vehicle was started. Used to determine if the last start-up was a cold start. The scan tool range is -39 to +140°C (-38 to +284°F). This parameter indicates the ambient air temperature at start-up.
Starter Relay Command	--	On	This parameter displays the engine control modules commanded state of the starter motor relay control circuit.
Starter Relay Command	--	Off
Starter Relay Circuit Status	--	Okay	This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display Okay, Incomplete and Fault. The scan tool will display OK/Incomplete if the circuit is operating correctly. The scan tool will display a Fault if there is an open, short to ground, or a short to voltage on the circuit.
	--	Fault
	--	Incomplete
TAC Forced Engine Shutdown (Throttle Actuator Control)	--	Yes	This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.
TAC Forced Engine Shutdown (Throttle Actuator Control)	--	No
TAC Motor (Throttle Actuator Control)	--	Enabled	This parameter indicates the status of the TAC motor driver. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display Disabled if the TAC motor is disabled.
TAC Motor (Throttle Actuator Control)	--	Disable
TAC Motor Command (Throttle Actuator Control)	--	0 - 100 %	This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position.
TFT sensor (If equipped)	--	°C	This parameter indicates the transmission fluid temperature measured by a sensor. In automatic transmission applications, this is based upon the transmission fluid temperature sensor input to the TCM.
TCS Torque Request Signal	--	0 - 100 %	This parameter indicates the torque requested from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.
Torque Delivered Signal	--	Nm	This parameter indicates the torque delivered from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.
Torque Management Spark Retard	--	°	his parameter indicates how much the ignition spark timing is being retarded to control torque by the engine control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving.
Total Knock Retard	--	°	This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the engine control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.
Total Misfire	--	Count	The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
TP Desired Angle	--	0 - 100 %	This parameter indicates the desired throttle angle calculated by the TAC module as commanded by the vehicle operator. The scan tool will display a higher value when the accelerator pedal is depressed, and a lower value as the accelerator pedal is released.
TP Indicated Angle	--	0 - 100 %	This parameter displays the angle of the throttle plate as calculated by the control module using the signals from the throttle position (TP) sensor(s). The TP indicated angle is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is wide open.
TP Sensor 1 (Throttle Position)	--	Volts	The scan tool displays Volts. The scan tool displays approximately ?? Volts when the ignition is on.
TP Sensor 1 Learned Minimum Position (Throttle Position)	--	Volts	This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle.
TP Sensor 1 Indicated Position (Throttle Position)	--	0 - 100 %	This parameter displays the angle of the throttle position (TP) sensor 1 as calculated by the control module using the signal from the TP sensor 1. The TP sensor 1 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open.
TP Sensors 1 and 2 (Throttle Position)	--	Agree	This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2 . The scan tool will display Agree or Disagree. Agree indicates that TP sensor 1 and TP sensor 2 voltages correspond to the same throttle position. Disagree indicates that TP sensor 1 and TP sensor 2 voltages correspond to different throttle positions.
TP Sensors 1 and 2 (Throttle Position)	--	Disagree
TP Sensor 2 (Throttle Position)	--	Volts	The scan tool displays Volts. The scan tool displays approximately ?? Volts when the ignition is ON.
TP Sensor 2 Learned Minimum Position (Throttle Position)	--	Volts	This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle.
TP Sensor 2 Indicated Position (Throttle Position)	--	0 - 100 %	This parameter displays the angle of the TP sensor 2 as calculated by the control module using the signal from the TP sensor 2. The TP sensor 2 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open. .
Vehicle Speed Sensor	--	Km/h (Mph)	This parameter indicates the vehicle speed calculated by the engine control module based on an input from the vehicle speed sensor (VSS). The scan tool will display a high value at higher vehicle speeds, and a low value at lower vehicle speeds.
Vehicle Speed Circuit Status	--	Okay	This parameter displays the status of the Vehicle Speed Circuit. The scan tool will display OK, Incomplete and Fault. The scan tool will display OK/Incomplete if the circuit is operating correctly.
	--	Fault
	--	Incomplete
VTD Auto Learn Timer	--	Active	The scan tool displays Active/Inactive. This parameter indicates if the control module is ready to learn the theft deterrent password. The scan tool will display active if the system is ready to learn. The scan tool will display inactive if the system has timed out or is not ready to learn the password.
VTD Auto Learn Timer	--	Inactive
VTD Fuel Disable	--	Active	This parameter Indicates if the VTD system has received proper information to enable or disable fuel. The scan tool will display Active or Inactive. The scan tool will display Active if the control module does not receive the correct password from the BCM. The scan tool will display Inactive if the control module receives the correct password from the BCM. If the system is Active, the engine will not start.
VTD Fuel Disable	--	Inactive
VTD Fuel Disable Until Ignition Off	--	On	The scan tool will display Yes or No. This parameter indicates if the VTD is disabled until the ignition is turned OFF. The scan tool will display Yes if the ignition is ON and a theft deterrent DTC is present. The scan tool will display off if the system is OK and the theft deterrent system is inactive.
VTD Fuel Disable Until Ignition Off	--	Off
VTD Fuel Enable	--	Yes	This parameter Indicates if the VTD system has received proper information to enable or disable fuel. The scan tool will display Yes or No. The scan tool will display No if the engine control module does not receive the correct password from the BCM. The scan tool will display Yes if the control module receives the correct password from the BCM. If the scan tool is displaying No, the engine will not start.
VTD Fuel Enable	--	No
VTD Password Learned	--	Yes	The scan tool displays Yes/No. This parameter indicates if the engine control module has learnt the theft deterrent password. The scan tool will display Yes if the system has learnt the password. The scan tool will display No if the system has timed out or has not learnt the password.
VTD Password Learned	--	No
Warm-ups Since DTC Cleared	--	Counts	This parameter indicates the number of warm-up cycles that have occurred since DTCs were cleared. The scan tool will display a higher counts as more warm-up cycles have occurred since the DTCs were cleared
Warm-ups without Emission Faults	--	Counts	The scan tool displays in counts. This parameter counts the number of warm-up cycles without an emission fault present. The parameter increments until a fault occurs. If a fault occurs, the counter reverts to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the ECM also resets the counter to 0.
Warm-ups without Non-Emission Faults	--	Counts	The scan tool displays in counts. This parameter counts the number of warm-up cycles without a non-emission fault present. The parameter increments until a fault occurs. If a fault occurs, the counter reverts to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the ECM also resets the counter to 0.
Wide Open Throttle	--	Yes	This parameter indicates the throttle status commanded by the engine control module. The scan tool will display Yes is the vehicle throttle is commanded to wide open. The scan tool will display No if the vehicle throttle is commanded to an amount less than 100 percent.
Wide Open Throttle	--	No

Engine Control Module Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
A/C Relay	Special Functions	The scan tool commands the air conditioning ON or OFF. ON indicates the A/C control circuit is being grounded by the control module, allowing PWM signal to the A/C compressor. OFF indicates the A/C is not being commanded on by the control module.
Cooling Fan Command	Output Controls Cooling	The scan tool commands the fan relay ON or OFF.
Cylinder Deactivation System	Cylinder Deactivation	The scan tool energizes or de-energizes all 4 VLOM solenoids for V4 or V8 mode.
Cylinder Deactivation 1	Cylinder Deactivation	The scan tool energizes or de-energizes the cylinder 1 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE.
Cylinder Deactivation 4	Cylinder Deactivation	The scan tool energizes or de-energizes the cylinder 4 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE
Cylinder Deactivation 6	Cylinder Deactivation	The scan tool energizes or de-energizes the cylinder 6 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE
Cylinder Deactivation 7	Cylinder Deactivation	The scan tool energizes or de-energizes the cylinder 7 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE.
Engine Controls Ignition Relay Command	Engine Output Controls	The scan tool commands the engine controller to turn the relay ON or OFF.
EVAP Purge Solenoid	Engine Output Controls/EVAP System	The scan tool commands the EVAP Purge Solenoid ON or OFF.
EVAP Purge/Seal	Engine Output Controls/EVAP System	The scan tool simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
EVAP Vent Solenoid	Engine Output Controls/EVAP System	The scan tool Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
Fan Relay 1	Engine Output Controls	The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF.
Fan Relay 2 and 3	Engine Output Controls	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed.
Fan Relay 1, 2 and 3	Engine Output Controls	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed.
Fuel Pump Relay Command	Engine Output Controls/Fuel Pump	The scan tool Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running.
GEN L-Terminal	Engine Output Controls	The scan tools commanded states are ON or OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage.
HO2S Bank 1 Sensor 1 Heater	Engine Output Controls/Heated Oxygen Sensors	The scan tool commands the HO2S heater ON, 0-100 percent in 10 percent increments while the engine is running.
HO2S Bank 1 Sensor 2 Heater	Engine Output Controls/Heated Oxygen Sensors	The scan tool commands the HO2S heater ON, 0-100 percent in 10 percent increments while the engine is running.
HO2S Bank 2 Sensor 1 Heater	Engine Output Controls/Heated Oxygen Sensors	The scan tool commands the HO2S heater ON, 0-100 percent in 10 percent increments while the engine is running.
HO2S Bank 2 Sensor 2 Heater	Engine Output Controls/Heated Oxygen Sensors	The scan tool commands the HO2S heater ON, 0-100 percent in 10 percent increments while the engine is running.
Idle Spark	Engine Output Controls/Spark Control	The scan tool disables and enables idle spark advance with the engine running.
Loop Status	Engine Output Controls	The scan tool controls the system loop status. The commanded states include None, Open, or Closed. The normal commanded state is None. When commanded Open or Closed, the system remains in the commanded state until cancelled by the scan tool.
Malfunction Indicator Lamp	Engine Output Controls	The scan tool activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool.
Oil Life Reset	Oil Life Reset	The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life.
Spark Retard	Engine Output Controls/Spark Control	The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The degrees of spark retard will remain in the commanded state until cancelled by the scan tool. The normal commanded states is NONE.
Starter Relay	Engine Output Controls	This output control is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON.