For 1990-2009 cars only
3X Crank Sensor: Scan Tool Displays the engine RPM as calculated from the 3X signal
synthesized for the powertrain control module (PCM) by the ignition module.
18X Crank Sensor: Scan Tool Displays the engine RPM as calculated from the 18X sensor signal passed through the ignition module to the PCM.
1-2 Sol.: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
2-3 Sol,: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
A/C High Side Pressure: Scan Tool Displays 0.00 to 5.00 volts. This represents the A/C refrigerant pressure sensor signal. The amount of pressure indicates the amount of load that the A/C compressor is placing on the engine. The PCM uses this information in order to adjust the idle and to control the cooling fans.
A/C Pressure Out Of Range: Scan Tool Displays YES or NO. YES indicates that the PCM is monitoring an A/C Refrigerant Pressure signal voltage which is too high or too low to allow the A/C compressor clutch to engage.
A/C Relay: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
Actual EGR Position: Scan Tool Range 0 percent to 100 percent. This represents the actual position of the EGR pintle in percent. 0 percent displayed indicates a fully extended pintle, with the exhaust gas recirculation (EGR) valve closed.
A.I.R. Active Test Air Injection: A.I.R. Active Test Air Injection represents whether the active test has been run. The scan tool displays Yes or No.
A.I.R. Active Test Inhibited: A.I.R. Active Test Inhibited indicates whether the PCM is inhibiting the AIR active test. The scan tool displays Yes or No.
A.I.R. Active Test Passed: A.I.R. Active Test Passed indicates whether the active test has been run and has passed. The scan tool displays Yes or No.
A.I.R. Passive Test Inhibited: A.I.R. Passive Test Inhibited indicates whether the AIR passive test is being inhibited by the PCM. The scan tool displays Yes or No.
A.I.R. Passive Test In Progress: A.I.R. Passive Test In Progress indicates whether the AIR passive test is currently running. The scan tool displays Yes or No.
A.I.R. Passive Test Passed: A.I.R. Passive Test Passed indicates whether the passive test has passed. The scan tool displays Yes or No.
A.I.R. Passive Test 1 Passed: A.I.R. Passive Test 1 Passed indicates whether the first passive test has passed. The scan tool displays Yes or No.
A.I.R. Passive Test 2 Failed: A.I.R. Passive Test 2 Failed indicates whether the second passive test has failed. The scan tool displays Yes or No.
A.I.R. Pump Relay: A.I.R. Pump Relay indicates the commanded state of the AIR pump relay. The scan tool displays On or Off.
A.I.R. Pump Relay: A.I.R. Pump Relay indicates the diagnostic state of the output driver for the AIR pump relay control circuit. The scan tool displays Fault or OK.
A.I.R. Solenoid: A.I.R. Solenoid indicates the dommanded state of the AIR solenoid. The scan tool displays On or Off.
A.I.R. Solenoid: A.I.R. Solenoid indicates the diagnostic state of the output driver for the AIR solenoid control circuit. The scan tool displays Fault or OK.
Air Fuel Ratio: Scan Tool Range 0.0 to 25.5. Air Fuel Ratio indicates the PCM commanded value. In closed loop, Air Fuel Ratio should normally be around 14.2-14.7. A lower Air Fuel Ratio indicates a richer commanded mixture, which may be seen during Power Enrichment or TWC Protection modes. A higher Air Fuel Ratio indicates a leaner commanded mixture. This can be seen during Decel Fuel Mode.
BARO: Scan Tool Range 10 to 105 kPa 0.00 to 5.00 volts. The barometric pressure reading is determined from the manifold absolute pressure (MAP) sensor signal that us monitored during key-up and wide-open throttle (WOT) conditions. The barometric pressure is used to adjust the fuel delivery and the spark advance to compensate for altitude changes.
Cam Signal Present: Scan Tool Displays YES or NO. This represents whether the PCM is receiving a cam signal.
Commanded A/C: Scan Tool Displays ON or OFF. This represents the PCM commanded state of the A/C compressor clutch relay driver circuit. The A/C compressor clutch should be engaged when Commanded A/C displays ON.
Commanded Fan 1 / Commanded Fan 2: Scan Tool Displays ON or OFF. This represents the PCM commanded state of the fan 1, or low speed, and fan 2, or high speed, control circuits.
Commanded Gen: Scan Tool Displays ON or OFF. OFF displayed indicates that the PCM has commanded the generator control circuit OFF.
Commanded Starter: Scan Tool Displays ENABLED or DISABLED. Disabled displayed indicates that the PCM has inhibited starter relay operation. The PCM will inhibit starter relay operation if the engine is running and a correct VTD password has not been received from the VTD module, or if the starter is engaged for an extended period of time.
Cruise: Scan Tool Displays ENGAGED or DISENGAGED. This represents the state of the Cruise Status Input from the SMCC module. The Cruise Status should not display ENGAGED unless the vehicle is operating in cruise control.
Cruise Inhibit: Scan Tool Displays OK, Stuck Low, or open, Stuck High, or Fault. This represents state of the output driver.
Cruise Inhibited: Scan Tool Displays YES or NO. YES displayed indicates that the PCM is commanding the SMCC module to inhibit cruise control operation. The scan tool should display YES with park, neutral, reverse or low gear selected.
Current Gear: Scan Tool Displays numbers 1, 2, 3, or 4. The PCM looks at Trans Range position and the gear commanded by the PCM. The actual forward gear that the transaxle is in will be the lower of the two gears because the manual valve can override the PCM-commanded gear.
Cyl. 1-6 Injector Ckt. Status: Scan Tool Displays OK, Stuck Low, or open, or Stuck High. This represents state of the output driver.
Decel Fuel Mode: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in Deceleration Fuel Mode. The PCM will command deceleration fuel mode when a sudden decrease in the throttle position has been detected while the vehicle is traveling more than 25 mph. While in Deceleration Fuel mode, the PCM will decrease the amount of fuel delivered by entering Open Loop and decreasing the injector pulse width.
Desired EGR Position: Scan Tool Range 0 percent to 100 percent. This represents the EGR pintle position that the PCM is commanding. The desired EGR Position should stay close to the actual EGR Position.
Desired Idle Speed: Scan Tool Range 0 to 3187 RPM. This represents the idle speed that is commanded by the PCM. The PCM will compensate for various engine loads based on engine coolant temperature in order to keep the engine at the desired idle speed.
Driver Module 1 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. Represents state of the output driver.
Driver Module 2 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. Represents state of the output driver.
Driver Module 3 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. This represents the state of the output driver.
Driver Module 4 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. This represents the state of the output driver.
ECT: Scan Tool Range -40°C to 151°C, -40°F to 304°F. The Engine Coolant Temperature (ECT) sensor is mounted in the coolant stream. The PCM applies 5 volts to the ECT sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold, indicating that internal resistance is high, the PCM monitors a high signal voltage and interprets it as a cold engine. As the sensor warms, or as the internal resistance decreases, the voltage signal decreases and the PCM interprets the lower voltage as a warm engine.
EGR Closed Valve Pintle Position: Scan Tool Range 0.0 to 5.0 volts. This represents the learned voltage that the PCM uses in order to determine whether or not the EGR valve is fully closed, and at 0 percent pintle position. If the Desired EGR Position is 0 percent, and a difference of more than 0.4 volt between the EGR Feedback and the EGR Closed Valve Pintle Position is detected, DTC P0405 will set.
EGR Duty Cycle: Scan Tool Range 0 percent to 100 percent. This represents the EGR valve driver pulse width modulation (PWM) signal from the PCM. A duty cycle of 0 percent indicates that no EGR flow is being commanded. A 100 percent duty cycle indicates maximum EGR flow commanded.
EGR Feedback: Scan Tool Range 0.00 to 5.00 volts. This indicates that the EGR pintle position sensor signal voltage is being monitored by the PCM. A low voltage indicates a fully extended pintle, and a closed valve. A voltage near 5 volts indicates a fully retracted pintle, and an open valve.
EGR Flow Test Count: Scan Tool Range 0 to 255. This indicates the number of EGR flow test samples that were collected during the current ignition cycle. The maximum number of samples allowed is one during normal operation. If the PCM battery feed has been disconnected or a DTC P0401 has been cleared, several EGR flow test samples will be allowed during the next ignition cycle. This is to allow repair verification during a single ignition cycle.
EGR Position Error: Scan Tool Range 0 percent to 100 percent. This indicates the difference between the desired EGR position and the actual EGR position currently being monitored by the PCM. If the EGR Position Error reaches an unacceptable level, DTC P0405 will set.
Engine Load: Scan Tool Range 0 percent to 100 percent. The engine load is calculated by the PCM from the engine speed and the MAF sensor readings. The engine load should increase with an increase in RPM or air flow.
Engine Oil Level: Scan Tool Displays OK or LOW. This indicates the oil level as determined by the engine oil level switch.
Engine Oil Life: Scan Tool Range 0 percent to 100 percent. This indicates the engine oil life index. The PCM calculates engine oil life based on the number of engine revolutions seen, and on operating conditions such as calculated oil temperature. Pressing the Oil Life Monitor reset switch will return the displayed Engine Oil Life to 100 percent.
EOP Sensor: Scan Tool Range 0.00 to 5.00 volts. This represents the engine oil pressure sensor signal voltage. The PCM transmits the engine oil pressure information to the instrument panel cluster (IPC) via Class 2 serial data. The normal range of the engine oil pressure sensor is from 0.5 volt at 0 kPa (0 PSI) and 4.5 volts at 88 kPa (128 PSI).
Engine Run Time: Scan Tool Range 00:00:00 to 99:99:99 Hrs:Min:Sec. This indicates the time elapsed since the engine was started. If the engine is stopped, ENGINE RUN TIME will be reset to 00:00:00.
Engine Speed: Scan Tool Range 0 to 9999 RPM. The engine speed is computed by the PCM from the 3X reference input. It should remain close to desired idle under various engine loads with engine idling.
EVAP Canister Purge: Scan Tool Range 0 percent to 100 percent. This represents the PCM-commanded pulse width modulation (PWM) duty cycle of the evaporative emission (EVAP) purge valve. Zero percent displayed indicates no purge. One hundred percent displayed indicates a full purge.
EVAP Fault History: Scan Tool Displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK or WEAK VACUUM. The EVAP Fault History indicates the status of the EVAP system diagnostics performed by the PCM.
EVAP Purge Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
EVAP Vent Sol.: Scan Tool Displays Open or Closed. This represents the commanded state of the EVAP vent solenoid.
EVAP Vent Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Extended Travel Brake Switch: Scan Tool Displays Engaged or Released. This represents the monitored state of the switch.
FC Relay 1: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
FC Relay 2 and 3: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Fuel Level: Scan Tool Displays 0-100 percent. The scan tool displays in percentage the amount of fuel in the fuel tank.
Fuel Pump: Scan Tool Displays ON or OFF. This indicates the PCM commanded state of the fuel pump relay control circuit.
Fuel Tank Pressure: Scan Tool Displays in 0 to 5.00 volts or -32 to 32 in/H2O. This parameter indicates the pressure or vacuum inside the fuel tank. A negative value indicates a vacuum. A positive value indicates a pressure.
Fuel Trim Cell: Scan Tool Range 0 to 9. The fuel trim cell depends on the engine speed and the MAF sensor readings. A plot of RPM vs. MAF is divided into 10 cells. The fuel trim cell indicates which cell is currently active.
Fuel Trim Learn: Scan Tool Displays NO or YES. When conditions are appropriate for enabling long-term fuel trim corrections, FUEL TRIM LEARN will display YES. This indicates that the long term fuel trim is responding to short-term fuel trim. If the Fuel Trim Learn displays NO, long-term fuel trim will not respond to changes in short-term fuel trim.
Generator PWM: Scan Tool Range 0 percent to 100 percent. This represents the field terminal input from the generator. The field PWM duty cycle indicates generator output level. A higher duty cycle indicates a higher generator output. The PCM uses the generator F terminal signal to adjust the spark and the IAC in order to compensate for variances in engine load caused by the generator.
HO2S Sen. 1: Scan Tool Range 0 to 1132 mV. This represents the fuel control exhaust oxygen sensor output voltage. The voltage should fluctuate constantly within a range between 10 mV , indicating a lean exhaust and 1000 mV, indicating a rich exhaust, while operating in Closed Loop.
HO2S Sen. 1: Scan Tool Displays NOT READY or READY. This indicates the status of the fuel control exhaust oxygen sensor. The scan tool will indicate that the exhaust oxygen sensors are ready when the PCM detects a fluctuating HO2S voltage sufficient to allow closed loop operation. This will not occur unless the exhaust oxygen sensors are warmed up.
HO2S Sen. 2: Scan Tool Range 0 to 1132 mV. This represents the catalyst monitor exhaust oxygen sensor output voltage. If the catalyst is operating efficiently, the HO2S 1 signal will be far more active than that produced by the HO2S 2 sensor. If the PCM detects a level of HO2S 2 activity that indicates the catalyst is no longer operating efficiently, DTC P0420 will be set.
HO2S XCounts: Scan Tool Range 0 to 255. This indicates the number of times the HO2S 1 signal has crossed the 450-mV bias voltage during a 1-second interval. A HO2S 1 signal that almost never crosses the bias voltage could indicate a fuel trim problem, a faulty HO2S 1 circuit, or a faulty HO2S 1.
IAC Position: Range 0 to 255. This displays the commanded position of the idle air control pintle in counts. A larger number of counts means that more air is being commanded through the idle air passage. The IAC Position should respond fairly quickly to changes in engine load in order to maintain the desired idle RPM.
IAT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). The PCM converts the resistance of the intake air temperature sensor to degrees. The PCM uses intake air temperature (IAT) to adjust the fuel delivery and the spark timing according to incoming air density. The IAT is also compared to The ECT at startup in order to identify cold starts for the HO2S heater and the EVAP diagnostics.
Ignition 1: Scan Tool Range 0 to 25.5 volts. This represents the system voltage measured by the PCM at its ignition feed.
Ignition Mode: Scan Tool Displays BYPASS or IC. This indicates the commanded state of the bypass signal output from the PCM. When BYPASS is displayed, the ignition control module is controlling the spark advance at a fixed 10° BTDC (bypass mode). Ignition Control (IC) displayed indicates that the PCM has requested control of the spark advance (IC mode). The ignition control module determines the correct operating mode based on the level of voltage that the PCM applies to the ignition control module bypass circuit. The PCM provides 5 volts to the ignition control module bypass circuit when conditions are appropriate for PCM control of spark timing (IC mode). If the PCM does not apply 5 volts to the bypass circuit, or if the ignition control module does not receive it, the module will control spark timing.
Injector Pulse Width: Scan Tool Displays 0 to 1000 milliseconds. This represents the injector pulse width as commanded by the PCM.
Knock Retard: Scan Tool Range 0.0 degrees to 25.5 degrees. This indicates the amount of spark the PCM is removing from the IC spark advance in response to the signal from the knock sensors. The traction control system Desired Torque signal from the electronic brake and traction control module (EBTCM) may cause Knock Retard to display a value more than 0.0 degrees if traction control is active.
Long Term Fuel Trim: Scan Tool Range -23 percent to 16 percent. Long Term Fuel Trim is derived from the Short Term Fuel Trim value and represents a long-term correction of fuel delivery. A value of 0 percent indicates that fuel delivery requires no compensation in order to maintain the PCM commanded air-to-fuel ratio. A negative value significantly below 0 percent indicates that the fuel system is rich and fuel delivery is being reduced. This is indicated by a decreased injector pulse width. A positive value significantly more than 0 percent indicates that a lean condition exists and the PCM is compensating by adding fuel. This is indicated by an increased injector pulse width. Because Long Term Fuel Trim tends to follow Short Term Fuel Trim, a value in the negative range due to canister purge at idle should not be considered unusual. The PCM's maximum authority to control long term fuel trim allows a range between -23 percent and +16 percent. Fuel trim values at or near maximum authority may indicate an excessively rich or lean system.
Loop Status: Scan Tool Displays OPEN or CLOSED. Closed Loop indicates that the PCM is controlling fuel delivery according to the oxygen sensor voltage. In Open Loop, the PCM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, engine coolant, and MAF sensor inputs only.
MAF: Scan Tool Range 0.0-512 gm/s. mass air flow (MAF) is the MAF Input Frequency converted to grams of air per second. This indicates the amount of air entering the engine.
MAF Frequency: Scan Tool Range 0 to 32000 Hz. The MAF sensor input signal to the PCM is a frequency which varies from approximately 3000 Hz at idle to more than 7000 Hz at wide-open throttle. The PCM converts this frequency signal to grams per second to be displayed on the scan tool as MAF.
MAP: Scan Tool Range 10-105 kPa/0.00 to 4.97 volts. The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure from engine load, EGR flow, and speed changes. As the intake manifold pressure increases, the intake vacuum decreases, resulting in a higher MAP sensor voltage and kPa reading. The MAP sensor signal is used to monitor intake manifold pressure changes during the EGR flow test, to update the BARO reading, and as an enabling factor for many of the diagnostics.
MIL: Scan Tool Displays ON or OFF. Indicates the PCM commanded state of the Malfunction Indicator Lamp (MIL).
MIL: Scan Tool Displays OK, Fault, or Invalid State. This represents state of the output driver.
Misfire Current Cyl #1- Misfire Current Cyl #6: Scan Tool Range 0 to 198 Counts. The Misfire Current counters indicate the number of cylinder firing events detected as possible misfires on each cylinder during the last 200 crankshaft revolutions. The number that the counters display are twice the actual number of misfire events detected. The counters may normally display some activity, but the activity should be very low and should be nearly equal for all the cylinders.
Misfire History Cyl #1- Cyl #6: Scan Tool Range 0 to 65535 Counts. The Misfire History counters indicate the total level of misfire that has been detected on each cylinder. The number that the counters display are twice the actual number of misfire events detected. The Misfire History counters will not update or show any activity until a misfire DTC (P0300) has become active. The Misfire History counters will be updated every time a 200 crankshaft revolution misfire test failure is detected.
Misfiring Cylinder (Primary) / Misfiring Cylinder (Secondary): Scan Tool Displays 0 or Cylinder #. If a misfire is being detected, Misfiring Cylinder displays the misfiring cylinder numbers.
Power Enrichment: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in the Power Enrichment mode. The PCM will command the Power Enrichment mode when a large increase in the throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done in order to prevent a possible sag or hesitation from occurring during acceleration.
Rich/Lean: Scan Tool Displays RICH or LEAN. This indicates whether the oxygen sensor voltage is greater than a 600-mV threshold voltage (rich) or less than a 300-mV threshold voltage (lean). The voltage should change constantly while in closed loop, indicating that the PCM is controlling the air/fuel mixture properly.
Short Term Fuel Trim: Scan Tool Range -11 percent to 20 percent. Short Term Fuel Trim represents a short-term correction to fuel delivery by the PCM in response to the amount of time the fuel control oxygen sensor voltage spends above or below the 450-mV threshold. If the oxygen sensor voltage has mainly remained less than 450 mV, indicating a lean air-to-fuel mixture, the short-term fuel trim will increase into the positive range above 0 percent and the PCM will add fuel. If the oxygen sensor voltage stays mainly above the threshold, the short-term fuel trim will decrease below 0 percent into the negative range, while the PCM reduces fuel delivery in order to compensate for the indicated rich condition. Under certain conditions such as extended idle and high ambient temperatures, canister purge may cause Short Term Fuel Trim to read in the negative range during normal operation. The PCM's maximum authority to control fuel trim allows a range between -11 percent and +20 percent. Fuel trim values at maximum authority may indicate an excessively rich or lean system.
Spark: Scan Tool Range -64 degrees to 64 degrees. This displays the spark timing being commanded by the PCM on the IC circuit. A negative (-) value indicates degrees Before Top Dead Center (BTDC), or spark advance. A positive value indicates degrees After Top Dead Center (ATDC), or spark retard. Because the ignition control module sets spark advance at a fixed value of 10° BTDC while operating in Bypass mode, the displayed spark advance only reflects true spark timing when the PCM has commanded the IC mode.
Starter Enable Relay: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Start-Up ECT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). This indicates the Engine Coolant Temperature at the time the vehicle was started. This is used by the HO2S diagnostic in order to determine whether the last startup was a cold start.
Start-Up IAT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). This indicates the Intake Air Temperature at the time that the vehicle was started. This range is used by the HO2S diagnostic in order to determine whether the last startup was a cold start.
TCC Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Throttle At Idle: Scan Tool Displays YES or NO. This indicates whether the TP angle being monitored by the PCM is at 0 percent.
Total Misfire Current Count:: Scan Tool Range 0 to 99. This indicates the total number of cylinder firing events that were detected as being misfires during the last 200 crankshaft revolution sample period.
Total Misfire Failures Since First Fail: Scan Tool Range 0 to 65535 Counts. This indicates the number of 200 crankshaft revolution sample periods during which the level of misfire was sufficiently high to report a failure.
Total Misfire Passes Since First Fail: Scan Tool Range 0 to 65535 Counts. This indicates the number of 200 crankshaft revolution sample periods during which the level of misfire was sufficiently low to report a pass.
TP Angle: Scan Tool Range 0 percent to 100 percent. The TP angle is computed by the PCM from the TP sensor voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle.
TP Sensor: Scan Tool Range 0.00 to 5.00 volts. This indicates the voltage being monitored by the PCM on the TP sensor signal circuit.
Traction Control: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the traction control system is taking action to reduce drive wheel slippage.
Traction Control Desired Torque: Scan Tool Range 0 percent to 100 percent. This represents the PWM signal from the electronic brake and traction control module (EBTCM). The EBTCM reduces the Traction Control Desired Torque signal pulse width when a drive wheel slippage situation is detected. The PCM monitors the Traction Control Desired Torque signal and reduces drive wheel slippage as necessary by retarding the spark timing or increasing the air-to-fuel ratio. The PCM can also turn OFF up to three fuel injectors if the Traction Control Desired Torque signal indicates enough drive wheel slippage. A problem with the Traction Control Desired Torque signal should cause DTC P1571 to set.
Traction Control Torque: Scan Tool Range 0 percent to 100 percent. This represents the PWM signal which indicates the percent of available torque the engine is delivering to the drive wheels. The EBTCM monitors the Traction Control Torque signal in order to ensure that the PCM is responding properly to the Traction Control Desired Torque signal.
Transmission Range: Scan Tool Displays INVALID, PARK/NEUTRAL, REVERSE, DRIVE 4, DRIVE 3, DRIVE 2, or LOW. Transmission Range represents the decoded status of the four inputs from the Transaxle Range Switch Assembly. The combination of transaxle range inputs indicates the position of the transaxle manual valve.
TR Switch P / A / B / C: Scan Tool Displays HIGH or LOW. The TR Switch P / A / B / C display represents the states of the four inputs from the transaxle range switch. HIGH displayed indicates a B+ voltage signal being monitored at the PCM. LOW displayed indicates a grounded input signal. The combination of transaxle range inputs indicates the position of the transaxle manual valve.
TWC Protection: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in three-way catalytic converter (TWC) protection mode. This is determined based on the engine load and the engine coolant temperature. While in TWC Protection, the PCM will decrease the air-to-fuel ratio to a value that depends on mass air flow (MAF). Higher MAF equals a lower air-to-fuel ratio.
Vehicle Speed: Scan Tool Range 0-255 km/h, 0-155 mph. The vehicle speed sensor signal is converted into mph and km/h for display.
18X Crank Sensor: Scan Tool Displays the engine RPM as calculated from the 18X sensor signal passed through the ignition module to the PCM.
1-2 Sol.: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
2-3 Sol,: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
A/C High Side Pressure: Scan Tool Displays 0.00 to 5.00 volts. This represents the A/C refrigerant pressure sensor signal. The amount of pressure indicates the amount of load that the A/C compressor is placing on the engine. The PCM uses this information in order to adjust the idle and to control the cooling fans.
A/C Pressure Out Of Range: Scan Tool Displays YES or NO. YES indicates that the PCM is monitoring an A/C Refrigerant Pressure signal voltage which is too high or too low to allow the A/C compressor clutch to engage.
A/C Relay: Scan Tool Displays OK, Fault, or Invalid State. These displays represent the state of the output driver.
Actual EGR Position: Scan Tool Range 0 percent to 100 percent. This represents the actual position of the EGR pintle in percent. 0 percent displayed indicates a fully extended pintle, with the exhaust gas recirculation (EGR) valve closed.
A.I.R. Active Test Air Injection: A.I.R. Active Test Air Injection represents whether the active test has been run. The scan tool displays Yes or No.
A.I.R. Active Test Inhibited: A.I.R. Active Test Inhibited indicates whether the PCM is inhibiting the AIR active test. The scan tool displays Yes or No.
A.I.R. Active Test Passed: A.I.R. Active Test Passed indicates whether the active test has been run and has passed. The scan tool displays Yes or No.
A.I.R. Passive Test Inhibited: A.I.R. Passive Test Inhibited indicates whether the AIR passive test is being inhibited by the PCM. The scan tool displays Yes or No.
A.I.R. Passive Test In Progress: A.I.R. Passive Test In Progress indicates whether the AIR passive test is currently running. The scan tool displays Yes or No.
A.I.R. Passive Test Passed: A.I.R. Passive Test Passed indicates whether the passive test has passed. The scan tool displays Yes or No.
A.I.R. Passive Test 1 Passed: A.I.R. Passive Test 1 Passed indicates whether the first passive test has passed. The scan tool displays Yes or No.
A.I.R. Passive Test 2 Failed: A.I.R. Passive Test 2 Failed indicates whether the second passive test has failed. The scan tool displays Yes or No.
A.I.R. Pump Relay: A.I.R. Pump Relay indicates the commanded state of the AIR pump relay. The scan tool displays On or Off.
A.I.R. Pump Relay: A.I.R. Pump Relay indicates the diagnostic state of the output driver for the AIR pump relay control circuit. The scan tool displays Fault or OK.
A.I.R. Solenoid: A.I.R. Solenoid indicates the dommanded state of the AIR solenoid. The scan tool displays On or Off.
A.I.R. Solenoid: A.I.R. Solenoid indicates the diagnostic state of the output driver for the AIR solenoid control circuit. The scan tool displays Fault or OK.
Air Fuel Ratio: Scan Tool Range 0.0 to 25.5. Air Fuel Ratio indicates the PCM commanded value. In closed loop, Air Fuel Ratio should normally be around 14.2-14.7. A lower Air Fuel Ratio indicates a richer commanded mixture, which may be seen during Power Enrichment or TWC Protection modes. A higher Air Fuel Ratio indicates a leaner commanded mixture. This can be seen during Decel Fuel Mode.
BARO: Scan Tool Range 10 to 105 kPa 0.00 to 5.00 volts. The barometric pressure reading is determined from the manifold absolute pressure (MAP) sensor signal that us monitored during key-up and wide-open throttle (WOT) conditions. The barometric pressure is used to adjust the fuel delivery and the spark advance to compensate for altitude changes.
Cam Signal Present: Scan Tool Displays YES or NO. This represents whether the PCM is receiving a cam signal.
Commanded A/C: Scan Tool Displays ON or OFF. This represents the PCM commanded state of the A/C compressor clutch relay driver circuit. The A/C compressor clutch should be engaged when Commanded A/C displays ON.
Commanded Fan 1 / Commanded Fan 2: Scan Tool Displays ON or OFF. This represents the PCM commanded state of the fan 1, or low speed, and fan 2, or high speed, control circuits.
Commanded Gen: Scan Tool Displays ON or OFF. OFF displayed indicates that the PCM has commanded the generator control circuit OFF.
Commanded Starter: Scan Tool Displays ENABLED or DISABLED. Disabled displayed indicates that the PCM has inhibited starter relay operation. The PCM will inhibit starter relay operation if the engine is running and a correct VTD password has not been received from the VTD module, or if the starter is engaged for an extended period of time.
Cruise: Scan Tool Displays ENGAGED or DISENGAGED. This represents the state of the Cruise Status Input from the SMCC module. The Cruise Status should not display ENGAGED unless the vehicle is operating in cruise control.
Cruise Inhibit: Scan Tool Displays OK, Stuck Low, or open, Stuck High, or Fault. This represents state of the output driver.
Cruise Inhibited: Scan Tool Displays YES or NO. YES displayed indicates that the PCM is commanding the SMCC module to inhibit cruise control operation. The scan tool should display YES with park, neutral, reverse or low gear selected.
Current Gear: Scan Tool Displays numbers 1, 2, 3, or 4. The PCM looks at Trans Range position and the gear commanded by the PCM. The actual forward gear that the transaxle is in will be the lower of the two gears because the manual valve can override the PCM-commanded gear.
Cyl. 1-6 Injector Ckt. Status: Scan Tool Displays OK, Stuck Low, or open, or Stuck High. This represents state of the output driver.
Decel Fuel Mode: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in Deceleration Fuel Mode. The PCM will command deceleration fuel mode when a sudden decrease in the throttle position has been detected while the vehicle is traveling more than 25 mph. While in Deceleration Fuel mode, the PCM will decrease the amount of fuel delivered by entering Open Loop and decreasing the injector pulse width.
Desired EGR Position: Scan Tool Range 0 percent to 100 percent. This represents the EGR pintle position that the PCM is commanding. The desired EGR Position should stay close to the actual EGR Position.
Desired Idle Speed: Scan Tool Range 0 to 3187 RPM. This represents the idle speed that is commanded by the PCM. The PCM will compensate for various engine loads based on engine coolant temperature in order to keep the engine at the desired idle speed.
Driver Module 1 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. Represents state of the output driver.
Driver Module 2 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. Represents state of the output driver.
Driver Module 3 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. This represents the state of the output driver.
Driver Module 4 Status: Scan Tool Displays Enabled, Off-High Volts, Off-High Temp, or Invalid State. This represents the state of the output driver.
ECT: Scan Tool Range -40°C to 151°C, -40°F to 304°F. The Engine Coolant Temperature (ECT) sensor is mounted in the coolant stream. The PCM applies 5 volts to the ECT sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold, indicating that internal resistance is high, the PCM monitors a high signal voltage and interprets it as a cold engine. As the sensor warms, or as the internal resistance decreases, the voltage signal decreases and the PCM interprets the lower voltage as a warm engine.
EGR Closed Valve Pintle Position: Scan Tool Range 0.0 to 5.0 volts. This represents the learned voltage that the PCM uses in order to determine whether or not the EGR valve is fully closed, and at 0 percent pintle position. If the Desired EGR Position is 0 percent, and a difference of more than 0.4 volt between the EGR Feedback and the EGR Closed Valve Pintle Position is detected, DTC P0405 will set.
EGR Duty Cycle: Scan Tool Range 0 percent to 100 percent. This represents the EGR valve driver pulse width modulation (PWM) signal from the PCM. A duty cycle of 0 percent indicates that no EGR flow is being commanded. A 100 percent duty cycle indicates maximum EGR flow commanded.
EGR Feedback: Scan Tool Range 0.00 to 5.00 volts. This indicates that the EGR pintle position sensor signal voltage is being monitored by the PCM. A low voltage indicates a fully extended pintle, and a closed valve. A voltage near 5 volts indicates a fully retracted pintle, and an open valve.
EGR Flow Test Count: Scan Tool Range 0 to 255. This indicates the number of EGR flow test samples that were collected during the current ignition cycle. The maximum number of samples allowed is one during normal operation. If the PCM battery feed has been disconnected or a DTC P0401 has been cleared, several EGR flow test samples will be allowed during the next ignition cycle. This is to allow repair verification during a single ignition cycle.
EGR Position Error: Scan Tool Range 0 percent to 100 percent. This indicates the difference between the desired EGR position and the actual EGR position currently being monitored by the PCM. If the EGR Position Error reaches an unacceptable level, DTC P0405 will set.
Engine Load: Scan Tool Range 0 percent to 100 percent. The engine load is calculated by the PCM from the engine speed and the MAF sensor readings. The engine load should increase with an increase in RPM or air flow.
Engine Oil Level: Scan Tool Displays OK or LOW. This indicates the oil level as determined by the engine oil level switch.
Engine Oil Life: Scan Tool Range 0 percent to 100 percent. This indicates the engine oil life index. The PCM calculates engine oil life based on the number of engine revolutions seen, and on operating conditions such as calculated oil temperature. Pressing the Oil Life Monitor reset switch will return the displayed Engine Oil Life to 100 percent.
EOP Sensor: Scan Tool Range 0.00 to 5.00 volts. This represents the engine oil pressure sensor signal voltage. The PCM transmits the engine oil pressure information to the instrument panel cluster (IPC) via Class 2 serial data. The normal range of the engine oil pressure sensor is from 0.5 volt at 0 kPa (0 PSI) and 4.5 volts at 88 kPa (128 PSI).
Engine Run Time: Scan Tool Range 00:00:00 to 99:99:99 Hrs:Min:Sec. This indicates the time elapsed since the engine was started. If the engine is stopped, ENGINE RUN TIME will be reset to 00:00:00.
Engine Speed: Scan Tool Range 0 to 9999 RPM. The engine speed is computed by the PCM from the 3X reference input. It should remain close to desired idle under various engine loads with engine idling.
EVAP Canister Purge: Scan Tool Range 0 percent to 100 percent. This represents the PCM-commanded pulse width modulation (PWM) duty cycle of the evaporative emission (EVAP) purge valve. Zero percent displayed indicates no purge. One hundred percent displayed indicates a full purge.
EVAP Fault History: Scan Tool Displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK or WEAK VACUUM. The EVAP Fault History indicates the status of the EVAP system diagnostics performed by the PCM.
EVAP Purge Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
EVAP Vent Sol.: Scan Tool Displays Open or Closed. This represents the commanded state of the EVAP vent solenoid.
EVAP Vent Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Extended Travel Brake Switch: Scan Tool Displays Engaged or Released. This represents the monitored state of the switch.
FC Relay 1: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
FC Relay 2 and 3: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Fuel Level: Scan Tool Displays 0-100 percent. The scan tool displays in percentage the amount of fuel in the fuel tank.
Fuel Pump: Scan Tool Displays ON or OFF. This indicates the PCM commanded state of the fuel pump relay control circuit.
Fuel Tank Pressure: Scan Tool Displays in 0 to 5.00 volts or -32 to 32 in/H2O. This parameter indicates the pressure or vacuum inside the fuel tank. A negative value indicates a vacuum. A positive value indicates a pressure.
Fuel Trim Cell: Scan Tool Range 0 to 9. The fuel trim cell depends on the engine speed and the MAF sensor readings. A plot of RPM vs. MAF is divided into 10 cells. The fuel trim cell indicates which cell is currently active.
Fuel Trim Learn: Scan Tool Displays NO or YES. When conditions are appropriate for enabling long-term fuel trim corrections, FUEL TRIM LEARN will display YES. This indicates that the long term fuel trim is responding to short-term fuel trim. If the Fuel Trim Learn displays NO, long-term fuel trim will not respond to changes in short-term fuel trim.
Generator PWM: Scan Tool Range 0 percent to 100 percent. This represents the field terminal input from the generator. The field PWM duty cycle indicates generator output level. A higher duty cycle indicates a higher generator output. The PCM uses the generator F terminal signal to adjust the spark and the IAC in order to compensate for variances in engine load caused by the generator.
HO2S Sen. 1: Scan Tool Range 0 to 1132 mV. This represents the fuel control exhaust oxygen sensor output voltage. The voltage should fluctuate constantly within a range between 10 mV , indicating a lean exhaust and 1000 mV, indicating a rich exhaust, while operating in Closed Loop.
HO2S Sen. 1: Scan Tool Displays NOT READY or READY. This indicates the status of the fuel control exhaust oxygen sensor. The scan tool will indicate that the exhaust oxygen sensors are ready when the PCM detects a fluctuating HO2S voltage sufficient to allow closed loop operation. This will not occur unless the exhaust oxygen sensors are warmed up.
HO2S Sen. 2: Scan Tool Range 0 to 1132 mV. This represents the catalyst monitor exhaust oxygen sensor output voltage. If the catalyst is operating efficiently, the HO2S 1 signal will be far more active than that produced by the HO2S 2 sensor. If the PCM detects a level of HO2S 2 activity that indicates the catalyst is no longer operating efficiently, DTC P0420 will be set.
HO2S XCounts: Scan Tool Range 0 to 255. This indicates the number of times the HO2S 1 signal has crossed the 450-mV bias voltage during a 1-second interval. A HO2S 1 signal that almost never crosses the bias voltage could indicate a fuel trim problem, a faulty HO2S 1 circuit, or a faulty HO2S 1.
IAC Position: Range 0 to 255. This displays the commanded position of the idle air control pintle in counts. A larger number of counts means that more air is being commanded through the idle air passage. The IAC Position should respond fairly quickly to changes in engine load in order to maintain the desired idle RPM.
IAT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). The PCM converts the resistance of the intake air temperature sensor to degrees. The PCM uses intake air temperature (IAT) to adjust the fuel delivery and the spark timing according to incoming air density. The IAT is also compared to The ECT at startup in order to identify cold starts for the HO2S heater and the EVAP diagnostics.
Ignition 1: Scan Tool Range 0 to 25.5 volts. This represents the system voltage measured by the PCM at its ignition feed.
Ignition Mode: Scan Tool Displays BYPASS or IC. This indicates the commanded state of the bypass signal output from the PCM. When BYPASS is displayed, the ignition control module is controlling the spark advance at a fixed 10° BTDC (bypass mode). Ignition Control (IC) displayed indicates that the PCM has requested control of the spark advance (IC mode). The ignition control module determines the correct operating mode based on the level of voltage that the PCM applies to the ignition control module bypass circuit. The PCM provides 5 volts to the ignition control module bypass circuit when conditions are appropriate for PCM control of spark timing (IC mode). If the PCM does not apply 5 volts to the bypass circuit, or if the ignition control module does not receive it, the module will control spark timing.
Injector Pulse Width: Scan Tool Displays 0 to 1000 milliseconds. This represents the injector pulse width as commanded by the PCM.
Knock Retard: Scan Tool Range 0.0 degrees to 25.5 degrees. This indicates the amount of spark the PCM is removing from the IC spark advance in response to the signal from the knock sensors. The traction control system Desired Torque signal from the electronic brake and traction control module (EBTCM) may cause Knock Retard to display a value more than 0.0 degrees if traction control is active.
Long Term Fuel Trim: Scan Tool Range -23 percent to 16 percent. Long Term Fuel Trim is derived from the Short Term Fuel Trim value and represents a long-term correction of fuel delivery. A value of 0 percent indicates that fuel delivery requires no compensation in order to maintain the PCM commanded air-to-fuel ratio. A negative value significantly below 0 percent indicates that the fuel system is rich and fuel delivery is being reduced. This is indicated by a decreased injector pulse width. A positive value significantly more than 0 percent indicates that a lean condition exists and the PCM is compensating by adding fuel. This is indicated by an increased injector pulse width. Because Long Term Fuel Trim tends to follow Short Term Fuel Trim, a value in the negative range due to canister purge at idle should not be considered unusual. The PCM's maximum authority to control long term fuel trim allows a range between -23 percent and +16 percent. Fuel trim values at or near maximum authority may indicate an excessively rich or lean system.
Loop Status: Scan Tool Displays OPEN or CLOSED. Closed Loop indicates that the PCM is controlling fuel delivery according to the oxygen sensor voltage. In Open Loop, the PCM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, engine coolant, and MAF sensor inputs only.
MAF: Scan Tool Range 0.0-512 gm/s. mass air flow (MAF) is the MAF Input Frequency converted to grams of air per second. This indicates the amount of air entering the engine.
MAF Frequency: Scan Tool Range 0 to 32000 Hz. The MAF sensor input signal to the PCM is a frequency which varies from approximately 3000 Hz at idle to more than 7000 Hz at wide-open throttle. The PCM converts this frequency signal to grams per second to be displayed on the scan tool as MAF.
MAP: Scan Tool Range 10-105 kPa/0.00 to 4.97 volts. The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure from engine load, EGR flow, and speed changes. As the intake manifold pressure increases, the intake vacuum decreases, resulting in a higher MAP sensor voltage and kPa reading. The MAP sensor signal is used to monitor intake manifold pressure changes during the EGR flow test, to update the BARO reading, and as an enabling factor for many of the diagnostics.
MIL: Scan Tool Displays ON or OFF. Indicates the PCM commanded state of the Malfunction Indicator Lamp (MIL).
MIL: Scan Tool Displays OK, Fault, or Invalid State. This represents state of the output driver.
Misfire Current Cyl #1- Misfire Current Cyl #6: Scan Tool Range 0 to 198 Counts. The Misfire Current counters indicate the number of cylinder firing events detected as possible misfires on each cylinder during the last 200 crankshaft revolutions. The number that the counters display are twice the actual number of misfire events detected. The counters may normally display some activity, but the activity should be very low and should be nearly equal for all the cylinders.
Misfire History Cyl #1- Cyl #6: Scan Tool Range 0 to 65535 Counts. The Misfire History counters indicate the total level of misfire that has been detected on each cylinder. The number that the counters display are twice the actual number of misfire events detected. The Misfire History counters will not update or show any activity until a misfire DTC (P0300) has become active. The Misfire History counters will be updated every time a 200 crankshaft revolution misfire test failure is detected.
Misfiring Cylinder (Primary) / Misfiring Cylinder (Secondary): Scan Tool Displays 0 or Cylinder #. If a misfire is being detected, Misfiring Cylinder displays the misfiring cylinder numbers.
Power Enrichment: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in the Power Enrichment mode. The PCM will command the Power Enrichment mode when a large increase in the throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done in order to prevent a possible sag or hesitation from occurring during acceleration.
Rich/Lean: Scan Tool Displays RICH or LEAN. This indicates whether the oxygen sensor voltage is greater than a 600-mV threshold voltage (rich) or less than a 300-mV threshold voltage (lean). The voltage should change constantly while in closed loop, indicating that the PCM is controlling the air/fuel mixture properly.
Short Term Fuel Trim: Scan Tool Range -11 percent to 20 percent. Short Term Fuel Trim represents a short-term correction to fuel delivery by the PCM in response to the amount of time the fuel control oxygen sensor voltage spends above or below the 450-mV threshold. If the oxygen sensor voltage has mainly remained less than 450 mV, indicating a lean air-to-fuel mixture, the short-term fuel trim will increase into the positive range above 0 percent and the PCM will add fuel. If the oxygen sensor voltage stays mainly above the threshold, the short-term fuel trim will decrease below 0 percent into the negative range, while the PCM reduces fuel delivery in order to compensate for the indicated rich condition. Under certain conditions such as extended idle and high ambient temperatures, canister purge may cause Short Term Fuel Trim to read in the negative range during normal operation. The PCM's maximum authority to control fuel trim allows a range between -11 percent and +20 percent. Fuel trim values at maximum authority may indicate an excessively rich or lean system.
Spark: Scan Tool Range -64 degrees to 64 degrees. This displays the spark timing being commanded by the PCM on the IC circuit. A negative (-) value indicates degrees Before Top Dead Center (BTDC), or spark advance. A positive value indicates degrees After Top Dead Center (ATDC), or spark retard. Because the ignition control module sets spark advance at a fixed value of 10° BTDC while operating in Bypass mode, the displayed spark advance only reflects true spark timing when the PCM has commanded the IC mode.
Starter Enable Relay: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Start-Up ECT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). This indicates the Engine Coolant Temperature at the time the vehicle was started. This is used by the HO2S diagnostic in order to determine whether the last startup was a cold start.
Start-Up IAT: Scan Tool Range -40°C to 151°C (-40°F to 304°F). This indicates the Intake Air Temperature at the time that the vehicle was started. This range is used by the HO2S diagnostic in order to determine whether the last startup was a cold start.
TCC Sol.: Scan Tool Displays OK, Fault, or Invalid State. This represents the state of the output driver.
Throttle At Idle: Scan Tool Displays YES or NO. This indicates whether the TP angle being monitored by the PCM is at 0 percent.
Total Misfire Current Count:: Scan Tool Range 0 to 99. This indicates the total number of cylinder firing events that were detected as being misfires during the last 200 crankshaft revolution sample period.
Total Misfire Failures Since First Fail: Scan Tool Range 0 to 65535 Counts. This indicates the number of 200 crankshaft revolution sample periods during which the level of misfire was sufficiently high to report a failure.
Total Misfire Passes Since First Fail: Scan Tool Range 0 to 65535 Counts. This indicates the number of 200 crankshaft revolution sample periods during which the level of misfire was sufficiently low to report a pass.
TP Angle: Scan Tool Range 0 percent to 100 percent. The TP angle is computed by the PCM from the TP sensor voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle.
TP Sensor: Scan Tool Range 0.00 to 5.00 volts. This indicates the voltage being monitored by the PCM on the TP sensor signal circuit.
Traction Control: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the traction control system is taking action to reduce drive wheel slippage.
Traction Control Desired Torque: Scan Tool Range 0 percent to 100 percent. This represents the PWM signal from the electronic brake and traction control module (EBTCM). The EBTCM reduces the Traction Control Desired Torque signal pulse width when a drive wheel slippage situation is detected. The PCM monitors the Traction Control Desired Torque signal and reduces drive wheel slippage as necessary by retarding the spark timing or increasing the air-to-fuel ratio. The PCM can also turn OFF up to three fuel injectors if the Traction Control Desired Torque signal indicates enough drive wheel slippage. A problem with the Traction Control Desired Torque signal should cause DTC P1571 to set.
Traction Control Torque: Scan Tool Range 0 percent to 100 percent. This represents the PWM signal which indicates the percent of available torque the engine is delivering to the drive wheels. The EBTCM monitors the Traction Control Torque signal in order to ensure that the PCM is responding properly to the Traction Control Desired Torque signal.
Transmission Range: Scan Tool Displays INVALID, PARK/NEUTRAL, REVERSE, DRIVE 4, DRIVE 3, DRIVE 2, or LOW. Transmission Range represents the decoded status of the four inputs from the Transaxle Range Switch Assembly. The combination of transaxle range inputs indicates the position of the transaxle manual valve.
TR Switch P / A / B / C: Scan Tool Displays HIGH or LOW. The TR Switch P / A / B / C display represents the states of the four inputs from the transaxle range switch. HIGH displayed indicates a B+ voltage signal being monitored at the PCM. LOW displayed indicates a grounded input signal. The combination of transaxle range inputs indicates the position of the transaxle manual valve.
TWC Protection: Scan Tool Displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in three-way catalytic converter (TWC) protection mode. This is determined based on the engine load and the engine coolant temperature. While in TWC Protection, the PCM will decrease the air-to-fuel ratio to a value that depends on mass air flow (MAF). Higher MAF equals a lower air-to-fuel ratio.
Vehicle Speed: Scan Tool Range 0-255 km/h, 0-155 mph. The vehicle speed sensor signal is converted into mph and km/h for display.
