Part 1

Scan Tool Data Definitions

The Scan Tool Data Definitions list contains a brief description of all of the 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. In some cases the parameter may appear more than once, or in more than one data list in order to group certain related parameters together.

A/C Relay Circuit Status
- This parameter displays the state of the air conditioning (A/C) clutch relay control circuit. The parameter displays Fault if the A/C clutch relay control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

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

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

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

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

APP Sensor 1 and 2
- 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.

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

BARO
- This parameter displays the barometric pressure sensor voltage.

Catalytic Converter Protection Active
- This parameter displays if the control module is commanding catalytic converter protection.

Catalyst Monitor Complete This Ignition
- This parameter displays the monitor completion status during the current driving/monitoring cycle.

Catalyst Monitor Enabled This Ignition
- This parameter displays the monitor enable status during the current driving/monitoring cycle.

CKP Resync Counter
- This parameter displays the number of times the control module re-syncs with the CKP sensor.

Component Monitor Complete This Ignition
- This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.

Component Monitor Enabled This Ignition
- This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.

Cruise Control Active
- This parameter displays the status of the cruise control system as determined by the control module.

Current Gear
- This parameter displays the transmission gear commanded by the transmission control module.

Current Gear Signal
- This parameter displays Invalid if the serial data message from the transmission control module (TCM) is invalid.

Cycles of Misfire Data
- This parameter displays the number of misfire tests during 200 engine revolutions.

Cylinder 1-6 Injector Circuit Status
- This parameter displays the state of the fuel injector control circuit. The parameter displays Fault if the fuel injector control circuit is open, shorted to ground, or shorted to voltage.

Cylinder 1-6 Knock Retard
- 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
- 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
- This parameter displays the desired exhaust camshaft angle as commanded by the control module.

Desired HO2S 1
- This parameter displays the desired HO2S lambda value as commanded by the control module.

Desired Idle Speed
- This parameter displays the desired engine idle speed as commanded by the control module.

Desired Int. CMP Bank 1 or 2
- This parameter displays the desired intake camshaft angle as commanded by the control module.

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

ECM Reset
- This parameter displays Yes when an internal control module reset occurs. The scan tool displays NO under normal operating conditions.

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

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
- 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
- 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
- This parameter displays OK if the engine oil pressure is within the correct range. If the control module detects that the engine oil pressure is not within the correct range, the scan tool displays Low.

Engine Oil Pressure Sensor
- This parameter displays the engine oil pressure.

Engine Oil Pressure Sensor
- This parameter displays the voltage signal received by the control module from the engine oil pressure (EOP) sensor.

Engine Run Time
- This parameter displays the time elapsed since the engine was started.

Engine Speed
- 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.

EVAP Monitor Complete This Ignition
- This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle.

EVAP Monitor Enabled This Ignition
- This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle.

EVAP Purge Solenoid Circuit Status
- 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, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

EVAP Purge Solenoid Command
- 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 Solenoid Circuit Status
- 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, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON.

EVAP Vent Solenoid Command
- 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
- This parameter displays the actual exhaust camshaft position in degrees.

Exh. CMP Angle Bank 1 or 2 Variance
- This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position.

Exh. CMP Bank 1 or 2 Command
- This parameter displays the exhaust camshaft position in percent of range as commanded by the control module.

Exh. CMP Solenoid Bn. 1 or 2 Circuit Status
- 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, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

FC Relay 1 Circuit Status
- This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

FC Relay 2 and 3 Circuit Status
- This parameter displays the state of the fan relay control circuit. The parameter displays Fault if the fan relay control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the relay control circuit has been commanded ON.

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

Fuel Level Sensor
- This parameter displays the voltage signal received by the control module from the fuel level sensor.

Fuel Pump Relay Circuit Status
- 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, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

Fuel Pump Relay Command
- This parameter displays the control modules commanded state of the fuel pump relay control circuit.

Fuel Tank Level Remaining
- This parameter displays the amount of fuel in liters/gallons that remains in the fuel tank as determined by the control module from information received from the left and right fuel level sensors.

Fuel Tank Pressure Sensor
- 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
- This parameter displays the voltage signal received by the control module from the fuel tank pressure (FTP) sensor.

Fuel Tank Rated Capacity
- This parameter displays the capacity of the fuel tank in liters or gallons.

Fuel Trim Learn
- 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.