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 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 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.
Important: 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. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
The column labeled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:
Eng: Engine DataCMP Actuator: Camshaft Position (CMP) Actuator Data
EVAP: Evaporative Emission (EVAP) Data
FUEL TRIM: Fuel Trim Data
HO2S: Heated Oxygen Sensor (HO2S) Data
Ignition: Ignition System Data
Induction: Induction Data
Misfire: Misfire Data
TAC: Throttle Actuator Control Data
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
5-Volt Reference 1 Circuit Status | EVAP, Ignition, Induction, TAC | OK/Fault | OK |
5-Volt Reference 2 Circuit Status | EVAP, Ignition, Induction, TAC | OK/Fault | OK |
A/C Relay Command | Eng, Indiction, Misfire, TAC | On/Off | Off |
Air Flow Calculated | Eng, EVAP, Fuel Trim, HO2S, Induction, Misfire, TAC | g/s | 3-6 g/s |
Air Fuel Ratio | Eng, Fuel Trim, HO2S, Induction | Ratio | 1.0 |
Ambient Air Temperature | Engine, EVAP | Degrees | Varies |
APP Indicated Angle | CMP Actuator, Eng, EVAP, HO2S, Ignition, Induction, Misfire, TAC, Fuel Trim | Percent | 0 |
APP Sensors | TAC | Percent | 0 |
APP Sensor 1 | TAC | Volts | Varies |
APP Sensor 1 Indicated Position | TAC | Percent | 0 |
APP Sensor 2 | TAC | Volts | Varies |
APP Sensor 2 Indicated Angle | TAC | Percent | 0 |
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
BARO | Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition, Induction | kPa | 65-110 kPa |
BPP Signal | Engine, TAC | Applied/Released/Invalid | Released |
BPP Signal Circuit | TAC | Applied/Released/Invalid | Released |
Calc. TWC Temp. | Fuel Tim, Misfire | °C/°F | Varies |
Catalytic Converter Protection Active | Fuel Trim, HO2S | Yes/No | No |
CKP Active Counter | Ignition | Counts | Varies |
CKP sensor | Ignition | RPM | 650-950 |
CKP Resync Counter | Ignition | Counts | Varies |
CMMD A/F Equivalence Ratio | Eng, Fuel Trim, HO2S, Induction | ratio | 1:1 |
CMP Active Counter | CMP Actuator, Ignition | Counts | 0-250 |
CMP Angle | CMP Actuator | Degrees of camshaft actuation | 0° |
CMP Command | CMP Actuator | Percent | 0% |
CMP Sensor | CMP Actuator, Ignition, Misfire | RPM | Varies |
CMP Solenoid Circuit Status | CMP Actuator | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
CMP Variance | CMP Actuator | Degrees of camshaft actuation | 0° |
CPP Switch (if equipped) | Engine, TAC | Applied/Released/Invalid | Released |
Cruise Control Active | Engine, TAC | Active/Inactive/Invalid | Inactive |
Cycles of Misfire Data | Misfire | Counts | 0-99 |
Cylinder 1-6 Injector Circuit Status | Misfire | OK, Incomplete, Short B+, Short Gnd / Open | OK |
Cylinder 1 and 4 IC Circuit Status | Misfire | OK, Incomplete, Short B+, Short Gnd / Open | OK |
Cylinder 2 and 5 IC Circuit Status | Misfire | OK, Incomplete, Short B+, Short Gnd / Open | OK |
Cylinder 3 and 6 IC Circuit Status | Misfire | OK, Incomplete, Short B+, Short Gnd / Open | OK |
Cold Start Up | Eng, EVAP | Yes/No | Varies on startup |
Decel Fuel Cut-off | Eng, Fuel Trim, HO2S | Active/Inactive | Inactive |
Desired CMP | CMP Actuator | Degrees | Varies |
Desired Idle Speed | CMP Actuator, Engine, EVAP, Induction, TAC | RPM | Varies |
Distance Since DTC Cleared | Engine | Km/Miles | Varies |
EC Ignition Relay Circuit Status | TAC | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
EC Ignition Relay Feed Back Signal | Engine, TAC | Volts | 13.0-14.2 |
EC Ignition Relay Command | Engine, TAC | ON/OFF | ON |
ECT Sensor | CMP Actuator, Eng, EVAP, HO2S, Fuel Trim, Ignition, Induction, Misfire, TAC | °C/°F | Varies |
Engine Load | CMP Actuator, Eng, Misfire, Fuel Trim, EVAP, HO2S, Ignition, Induction, TAC | Percent | 0 |
Engine Oil Pressure Sensor | CMP Actuator, Engine, Misfire | kPa/PSI | 15-25 PSI |
Engine Oil Level Switch | CMP Actuator, Engine | Low/OK | OK |
Engine Oil Life Remaining | CMP Actuator | Percent | Varies |
Engine Oil Temperature | CMP Actuator | Degrees | Varies |
Engine Off Time | EVAP | Hr: Min: Sec | Varies |
Engine Run Time | CMP Actuator, Engine, EVAP, HO2S, Ignition, Induction, Misfire, TAC | Hr: Min: Sec | Varies |
Engine Speed | CMP Actuator, Engine, EVAP, HO2S, Ignition, Induction, Misfire, Fuel Trim, TAC | RPM | Varies |
EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum/No Test Result | No Fault |
EVAP Purge Solenoid Circuit Status | EVAP | OK/Open/Short | OK |
EVAP Purge Solenoid Command | Eng, EVAP, Fuel Trim, HO2S | Percent | 0-2% |
EVAP Vent Solenoid Circuit Status | EVAP | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Venting |
Ext. Travel BPP Signal | TAC | Applied/Released/Invalid | Released |
Fuel Alcohol Content | Fuel Trim | Percent | 0-85% |
Fuel Composition Learn | Fuel Trim | Active/Inactive | Active |
Fuel Level Sensor | EVAP | Volts | Varies |
Fuel Level Sensor | EVAP | percent | Varies |
Fuel Pump Relay Circuit Status | Engine | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
Fuel Pump Relay Command | Engine | On/Off | On |
Fuel Tank Level Remaining | Engine, EVAP, Fuel Trim, Misfire | Percent | 0-104 |
Fuel Tank Pressure Sensor | Engine, EVAP | mm Hg/in H2O | Varies |
Fuel Tank Pressure Sensor | EVAP | Volts | Varies |
Fuel Trim Cell | Engine, Fuel Trim | 0-20 | 17 |
Fuel Trim Learn | Engine, Fuel Trim | Enabled/Disabled | Varies |
Fuel Trim System Test State | Fuel Trim | Disabled/Enabled/Run Purge Test | Varies |
Fuel Volatility | EVAP, Fuel Trim | Low/Moderate/High | Varies |
HO2S 1 | Engine, EVAP, Fuel Trim, Induction, HO2S | Millivolts | 300-900 and Varying |
HO2S 1 Heater Command | HO2S | Percent | Varies |
HO2S 1 Heater Command | HO2S | Amps | Varies |
HO2S 2 | Eng, Fuel Trim, HO2S | Millivolts | 400-600 and Varying |
HO2S 2 Heater Command | HO2S | Percent | Varies |
HO2S 2 Heater Command | HO2S | Amps | Varies |
Fuel Tank Rated Capacity | EVAP | Gallons/Liters | Varies with vehicle option |
Hot Open Loop | Fuel Trim, HO2S | Active/Inactive | Inactive |
IAT Sensor | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | °C/°F | Varies |
Ignition Accessory Signal | Engine, TAC | ON/OFF | OFF |
Ignition 1 Signal | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | Volts | 13.0-14.2 |
Injector PWM | Engine, Fuel Trim, HO2S, Misfire | Milliseconds | Varies |
IMT Valve Command | Induction | ON/OFF | ON |
IMT Valve Command | Induction | Open/Closed | Open |
IMT Valve Feedback Signal | Induction | Percent | 20-22% |
IMT Valve Learn Enabled | Induction | YES/NO | YES |
IMT Valve Position | Induction | Open, Intermediate, Closed | Open |
IMT Valve Solenoid Circuit Status | Induction | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
Knock Bank 1 Circuit Status | Ignition | Pass/Fail | Pass |
KS Bank 2 Circuit Status | Ignition | Pass/Fail | Pass |
Knock Detected Cylinder 1-6 | Ignition | YES/NO | NO |
LT FT Test Avg. | Fuel Trim | Percent | Varies |
LT FT Test Avg. w/o Purge | Fuel Trim | Percent | Varies |
Injector 1-6 Disabled Due to Misfire | Misfire | Yes/No | No |
Intake Manifold Pressure | Fuel Trim, Induction | kPa | Varies |
Knock Retard | Ignition | Degrees | 0 |
Knock Sensor Bank 1 Circuit Status | Ignition | OK/Fault/Incomplete | OK |
Knock Sensor Bank 2 Circuit Status | Ignition | OK/Fault/Incomplete | OK |
KS Module Status | Ignition | Pass/Fail | Pass |
Long Term FT | Eng, EVAP, Fuel Trim, HO2S | Percent | -10% to +10% |
Loop Status | Eng, Fuel Trim, EVAP, HO2S | Open/Closed | Closed |
MAF Sensor | CMP Actuator, Eng, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | g/s | 3-6 (Varies with altitude) |
MAF Sensor | EVAP, Fuel Trim, Induction, | Hz | 1,200-3,000 (depends on altitude) |
MAF Performance Test | Fuel Trim, Induction, TAC | OK/Fault | OK |
MAP Sensor | Induction | Volts | 0.4-2.0 Volts |
MAP Sensor | CMP Actuator, Eng, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, EGR, TAC | kPa | 20-48 kPa (Varies with altitude) |
MAP Performance Test 1 | Fuel Trim, Induction, TAC | OK/Fault | OK |
MAP Performance Test 2 | Fuel Trim, Induction, TAC | OK/Fault | OK |
MIL Command | Engine | On/Off | Off |
MIL Circuit Status | Engine | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
MIL Requested by DTC | CMP Actuator, Engine, EVAP, HO2S, Ignition, Induction, Misfire, TAC | YES/NO | NO |
Misfire Current Cyl. 1-6 | Misfire | Counts | 0 |
Misfire History Cyl. 1-6 | Misfire | Counts | 0 |
PNP Switch (if equipped) | Engine | Park/Neutral | Park |
Power Enrichment | Engine, Fuel Trim, HO2S, Misfire | Active/Inactive | Inactive |
Reduced Engine Power | TAC | Active/Inactive | Inactive |
ST FT Test Avg. | Fuel Trim | Percent | Varies |
Short Term FT | Eng, EVAP, Fuel Trim, HO2S, | Percent | -10 to +10 |
Spark | Engine, Fuel Trim, HO2S, Ignition, Induction, Misfire | Degrees | 22 (Varies) |
Start Up ECT | EVAP, Fuel Trim, HO2S | °C/°F | Varies |
Start Up IAT | EVAP, Fuel Trim, HO2S | °C/°F | Varies |
TAC Forced Engine Shutdown | TAC | YES/NO | NO |
TAC Motor | TAC | Enabled/Disabled | Enabled |
TAC Motor Command | TAC | Percent | Varies |
Torque Management Spark Retard | Ignition | Degrees | 0 |
TCS Torque Request Signal | TAC | Percent | 100% |
TCS Torque Delivered Signal | TAC | Percent | 75% |
Total Knock Retard | Ignition | Degrees | 0 |
Total Misfire | Misfire | Counts | 0 |
TP Desired Angle | TAC | Percent | Varies |
TP Indicated Angle | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | Percent | % |
TP Performance Test | Fuel Trim, Induction, TAC | OK/Fault | OK |
TP Sensor 1 | TAC | Volts | Varies |
TP Sensor 1 Indicated Position | TAC | Percent | 0 |
TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
TP Sensor 1 Learned Minimum | TAC | Volts | Varies |
TP Sensor 2 | TAC | Volts | Varies |
TP Sensor 2 Indicated Position | TAC | Percent | 0 |
TP Sensor 2 Learned Minimum | TAC | Volts | Varies |
Vehicle Speed Sensor | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | mph/km/h | 0 |
Warm-ups w/o Emission Faults | Engine | 1-10 | 0 |
Warm-ups w/o Non-Emission Faults | Engine | 1-10 | 0 |
Wide Open Throttle | TAC | YES/NO | NO |
