Part 1

Scan Tool Data Definitions

3X Crank Sensor
- 3 X crank sensor indicates engine RPM based on the 3X reference signal input to the powertrain control module (PCM).

18X Crank Sensor
- 18 X crank sensor indicates engine RPM based on the 18 X reference signal input to the PCM.

A/C High Side Pressure Sensor
- Scan tool displays 0.00-5.00 volts. 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 to adjust idle and to control the cooling fans.

A/C Off For WOT
- Scan tool displays YES or NO. Indicates whether A/C is commanded OFF due to wide open throttle (WOT).

A/C Pressure Disable
- Scan tool displays YES or NO. Indicates whether A/C is commanded OFF due to excessive or insufficient pressure.

A/C Relay Command
- Scan tool displays On or Off. Indicates intended PCM output to the A/C relay.

A/C Relay Circuit Status
- Scan tool displays OK, Fault, or Invalid State. Indicates the diagnostic state of the A/C relay control circuit.

A/C Request Signal
- This parameter displays the state of the air conditioning (A/C) request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls. The scan tool will display Yes or No. Yes indicates the control module is receiving a request from the HVAC system to ground the A/C clutch relay control circuit, engaging the A/C compressor clutch. No indicates the control module is not receiving a request from the HVAC system to ground the A/C clutch relay control circuit.

Air Fuel Ratio
- Scan tool range 0.0-25.5. 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 (PE) or 3-way catalytic converter (TWC) protection modes. A higher air fuel ratio indicates a leaner commanded mixture. This can be seen during Decel Fuel Mode.

APP Average
- This parameter displays the average of the 3 accelerator pedal position (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 Indicated Angle
- 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 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 Sensor 1
- This parameter displays the voltage signal sent to the control module from accelerator pedal position (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
- This parameter displays the angle of the accelerator pedal position (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 1 and 2
- This parameter displays the results of a control module test that compares the signals from the accelerator pedal position (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 Sensor 2
- This parameter displays the voltage signal sent to the control module from accelerator pedal position (APP) sensor 2 of the APP sensor assembly. APP sensor 2 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
- This parameter displays the angle of the accelerator pedal position (APP) sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 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.

BARO
- Scan tool range 10-105 kPa/0.00-5.00 volts. The barometric pressure (BARO) reading is determined from the manifold absolute pressure (MAP) sensor signal monitored during key up and WOT conditions. BARO is used to adjust fuel delivery and spark advance to compensate for altitude changes.

Boost Solenoid Circuit Status
- Boost Solenoid Circuit Status indicates the diagnostic state of the output driver for the boost solenoid control circuit. The scan tool displays Fault, OK or Invalid State

Boost Solenoid Command
- Boost Solenoid Command indicates the commanded state of the boost solenoid. The scan tool displays percent.

CMP Sensor Signal Present
- Camshaft position (CMP) Sensor Signal Present indicates if the PCM is receiving the cam sensor reference signal from the ignition control module (ICM). The scan tool displays Yes or No.

Cruise Control Active
- The scan tool displays Yes or No. The PCM determines the current status of cruise control operation. An active cruise control system is displayed as Yes.

Cruise Disengage (1-8) History
- The scan tool displays the last reasons why the cruise control system was disengaged. Refer to the Scan Tool Data Definitions (Disengaged History) for description.

Cruise ON/OFF Switch
- The scan tool displays ON or OFF. The PCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. A closed switch is displayed as ON.

Cruise Resume/Accel. Switch
- The scan tool displays ON or OFF. The PCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. A closed switch is displayed as ON. The cruise control ON/OFF switch must be switched ON in order to correctly view the Cruise Resume/Accel. Switch parameter.

Cruise Set/Coast Switch
- The scan tool displays ON or OFF. The PCM monitors the cruise control set/coast and resume/accelerate switch signal circuit. A closed switch is displayed as ON. The cruise control ON/OFF switch must be switched ON in order to correctly view the Cruise Set/Coast Switch parameter.

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 because the manual valve can override the PCM commanded gear.

Cycles of Misfire Data
- Scan Tool Range-0-99 Counts.

Indicates the total number of cylinder firing events that were detected as being misfires during the last 200 crankshaft revolution sample period.

Cyl. 1-6 Injector Circuit History
- Scan Tool Displays-Fault or OK

This parameter saves the state of the driver circuit for this device.

Cyl. 1-6 Injector Circuit Status
- Scan Tool Displays-Fault or OK

This parameter indicates the state of the driver circuit for this device.

Decel Fuel Cutoff
- 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 throttle position has been detected while the vehicle is traveling over 40 km/h (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 displays volts or a range from 0-100 percent. Represents the exhaust gas recirculation (EGR) pintle position that the PCM is commanding. Desired EGR Position should stay close to EGR position sensor.

Desired Idle Speed
- Scan tool range 0-3187 RPM. Represents the idle speed that is commanded by the PCM. The PCM will compensate for various engine loads based on engine coolant temperature (ECT) to keep the engine at the desired idle speed.

Driver Module 1 Status
- Driver Module 1 Status indicates the diagnostic state of the module. The scan tool displays Enabled, Off-High Volts, Off-High Temp, or Invalid State.

Driver Module 2 Status
- Driver Module 2 Status indicates the diagnostic state of the module. The scan tool displays Enabled, Off-High Volts, Off-High Temp, or Invalid State.

Driver Module 3 Status
- Driver Module 3 Status indicates the diagnostic state of the module. The scan tool displays Enabled, Off-High Volts, Off-High Temp, or Invalid State.

Driver Module 4 Status
- Driver Module 4 Status indicates the diagnostic state of the module. The scan tool displays Enabled, Off-High Volts, Off-High Temp, or Invalid State.

EC Ignition Relay Circuit
- Indicates the diagnostic state of output driver for the EC ignition relay control circuit. The scan tool displays Fault, OK, Invalid State.

ECT Sensor
- Scan tool range -40 to +151°C (-40 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, the internal resistance is high, the PCM monitors a high signal voltage and interprets the higher voltage as a cold engine. As the sensor warms, the internal resistance decreases, the voltage signal decreases and the PCM interprets the lower voltage as a warm engine.

EGR Flow Test Count
- Scan tool range 0-255. Indicates the number of EGR flow test samples collected during the current ignition cycle. The maximum number of samples allowed is 1 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 Learned Minimum Position
- Scan tool range 0.0-5.0 volts. Represents the learned voltage that the PCM uses to determine whether or not the EGR valve is fully closed, 0 percent pintle position. If the Desired EGR Position is 0 percent and a difference of more than 0.4 volt between EGR Feedback and EGR Closed Valve Pintle Position is detected, the PCM will illuminate the MIL to indicate an EGR system fault.

EGR Position Sensor
- Scan tool range 0.00-5.00 volts. Indicates the EGR pintle position sensor signal voltage being monitored by the PCM. A low voltage indicates a fully extended pintle, closed valve, a voltage near 5 volts indicates a fully retracted pintle, open valve.

EGR Position Sensor
- Scan tool range 0-100 percent. Represents the actual position of the EGR pintle in percent. 0 percent displayed indicates a fully extended pintle, the EGR valve is closed.

EGR Position Variance
- Scan tool range 0-100 percent. Indicates the difference between Desired EGR Position and Actual EGR Position currently being monitored by the PCM. If the EGR Position Variance reaches an unacceptable level, the PCM will illuminate the MIL to indicate an EGR system fault.

EGR Solenoid Command
- Scan tool range 0-100 percent. 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 Solenoid Circuit Status
- EGR Solenoid Circuit Status indicates the diagnostic state of the output driver for the EGR solenoid circuit. The scan tool displays Fault, OK or Invalid State.

Engine Load
- Scan tool range 0-100 percent. Engine load is calculated by the PCM from engine speed and mass air flow (MAF) sensor readings. Engine load should increase with an increase in RPM or air flow.

Engine Oil Level Switch
- Scan tool displays OK or LOW. Indicates the oil level as determined by the engine oil level switch.

Engine Oil Life Remaining
- Scan tool range 0-100 percent. Indicates the engine oil life index. The PCM calculates engine oil life based upon the number of engine revolutions seen and operating conditions such as calculated oil temperature. Pressing the Oil Life Monitor reset switch will return the displayed Engine Oil Life to 100 percent.

Engine Oil Pressure Switch
- Engine oil pressure switch indicates the state of the switch. The scan tool displays Low or OK.

Engine Run Time
- Scan tool range 00:00:00-99:99:99 Hrs:Min:Sec. 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 0-9999 RPM. Engine speed is computed by the PCM from the 3 X reference input. The engine speed should remain close to desired idle under various engine loads with engine idling

EVAP Fault History
- Scan Tool displays No Fault, Excess Vacuum, Purge Valve Leak, Small Leak, Weak Vacuum or No Test Result.

EVAP Purge Solenoid Circuit Status
- Evaporative emission (EVAP) Purge Solenoid Circuit Status indicates the diagnostic state of the output driver for the EVAP purge solenoid circuit. The scan tool displays Fault, OK or Invalid State.

EVAP Purge Solenoid Command
- Scan tool range 0-100 percent Represents the PCM commanded PWM duty cycle of the EVAP purge valve. 0 percent displayed indicates no purge. 100 percent displayed indicates full purge.

EVAP Vent Solenoid Circuit Status
- EVAP Vent Solenoid Circuit Status indicates the diagnostic state of the output driver for the EVAP vent solenoid circuit. The scan tool displays Fault, OK or Invalid State.

EVAP Vent Solenoid Command
- The scan tool displays the commanded state of the EVAP vent solenoid as either venting or not venting.

FC Relay 1 Circuit Status
- FC Relay 1 Circuit Status indicates the diagnostic state of the output driver for the FC relay 1 circuit. The scan tool displays Fault, OK or Invalid State.

FC Relay 1 Command
- FC relay 1 Command indicates the commanded state of the FC relay 1. The scan tool displays ON or OFF.

FC Relay 2 and 3 Circuit Status
- FC Relay 2 and 3 Circuit Status indicates the diagnostic state of the output driver for the FC relay 2 and 3 circuits. The scan tool displays Fault, OK or Invalid State.

FC Relay 2 and 3 Command
- FC Relay 2 and 3 Command indicates the commanded state of the FC relays 2 and 3. The scan tool displays ON or OFF.

Fuel Pump Relay Circuit Status
- Fuel Pump Relay Circuit Status indicates the diagnostic state of the output driver for the fuel pump relay control circuit. The scan tool displays Fault, OK or Invalid State.

Fuel Pump Relay Command
- Scan tool displays ON or OFF. Indicates the PCM commanded state of the fuel pump relay control circuit.

Fuel Tank Level Remaining
- Fuel Tank Level Remaining indicates the level of fuel remaining in the fuel tank. The scan tool displays percent.

Fuel Tank Pressure Sensor
- Scan Tool Displays - 0-5 volts, -32.69 to +014.01 mm Hg, or -17.5 to +7.5 in of H2O
Fuel tank pressure (FTP) is used extensively for EVAP purge control and EVAP system diagnostics.

Fuel Trim Cell
- Scan tool range 0-9 fuel trim cell is dependent upon engine speed and MAF sensor readings. A plot of RPM vs. MAF is divided into 10 cells. 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 FT is responding to short term fuel trim. If the Fuel Trim Learn displays NO, the long term FT will not respond to changes in short term FT.

Gen L-Terminal Signal Command
- Scan tool displays ON or OFF. OFF displayed indicates that the PCM has commanded the generator control circuit OFF.