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 for fuel control to compensate for altitude differences.
BARO: This parameter displays the barometric pressure voltage.
The control module uses the barometric pressure for fuel control to compensate for
altitude differences.
Brake Pedal Signal Status: This parameter displays the serial
data message of the brake signal from the EBTCM.
Calculated ECT - Closed Loop Fuel Control: This parameter displays
the modeled temperature that the control module calculates from air entering the engine,
coolant temperature, and ambient air temperature. If the actual engine coolant temperature
does not reach this calculated temperature within a predetermined amount of time,
a DTC will set.
Calculated ECT - Thermostat Diagnosis: This parameter displays
the modeled temperature that the control module calculates from air entering the engine,
coolant temperature, and ambient air temperature. If the actual engine coolant temperature
does not reach this calculated temperature within a predetermined amount of time,
a DTC will set.
Calc. TWC Temp. Bank 1 or Bank 2: This parameter displays the
catalytic converter temperature as calculated by the control module.
Catalytic Converter Protection Active: This parameter displays
if the control module is commanding catalytic converter protection.
Catalyst Monitor Complete This Ignition: 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.
Current Gear: This parameter displays the transmission gear
commanded by the transmission control module.
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.
This parameter displays indeterminate until the control circuit has been
commanded ON.
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 Bank 1 or 2 Sensor 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 the engine
oil pressure.
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.
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 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.
Extended Travel Brake Pedal Switch: This parameter displays
the state of the brake pedal as determined by the control module from the extended
travel brake pedal switch position.
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 1 Command: This parameter displays the control module
commanded state of the fan relay control circuit.
FC Relay 2 and 3 Command: This parameter displays the control
module commanded state of the fan relay control circuit.
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 Sensor Left Tank (Secondary): This parameter displays
the voltage signal received by the control module from the left or secondary fuel
level sensor.
Fuel Level Sensor Right Tank (Primary): This parameter displays
the voltage signal received by the control module from the right or primary 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.
HO2S Bank 1 or 2 Sensor 1: This parameter displays the lambda
output from the heated oxygen sensor (HO2S) to the control module. A lambda below
1.0 indicates a rich exhaust, while a lambda above 1.0 indicates a lean exhaust.
HO2S Bank 1 or 2 Sensor 2: This parameter displays the voltage
output from the HO2S to the control module. A lower voltage indicates a lean exhaust,
while a higher voltage indicates a rich exhaust.
HO2S Heater Monitor Complete This Ignition: This parameter displays
the diagnostic monitor completion status during the current driving/monitoring cycle.
HO2S Heater Monitor Enabled This Ignition: This parameter displays
the diagnostic monitor enable status during the current driving/monitoring cycle.
HO2S Htr. Bn. 1 or 2 Sensor 1 or 2 Circuit Status: This parameter displays the state of the oxygen sensor heater control circuit.
The parameter displays Fault if the oxygen sensor heater control circuit is open,
shorted to ground, or shorted to voltage. The parameter displays Indeterminate until
the circuit has been commanded ON.
HO2S Htr. Bn. 1 or 2 Sensor 1 Command: This parameter
displays the commanded state of the heater control circuit as commanded by the control
module.
HO2S/O2S Monitor Complete This Ignition: This parameter displays
the diagnostic monitor completion status during the current driving/monitoring cycle.
HO2S/O2S Heater Monitor Enabled This Ignition: This parameter
displays the diagnostic monitor enable status during the current driving/monitoring
cycle.
HO2S Sensing Element Bn. 1 or 2 Sensor 1: This
parameter displays the resistance of the sensing element within the control module.
The front sensors are normally regulated to 80 ohms.
IAT Sensor: This parameter displays the temperature of the air
entering the air induction system based on input to the control module from the intake
air temperature (IAT) sensor.
Ignition 0 Signal: This parameter displays On when the control
module detects a voltage at the ignition 0 input terminal.
Ignition 1 Signal: This parameter displays On when the control
module detects a voltage at the ignition 1 input terminal.
IMRC Solenoid Circuit Status: This parameter displays the state
of the IMRC control circuit. The parameter displays Fault if the IMRC control circuit
is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate
until the circuit has been commanded ON.
IMRC Solenoid Command: This parameter displays the control modules
commanded state of the IMRC solenoid.
Initial Brake Apply Signal: This parameter displays the state
of the brake pedal that is transmitted over the serial data circuit from the electronic
brake control module (EBCM).
Injector 1-6 Command: This parameter displays the amount
of fuel injector ON time or pulse width as commanded by the control module.
Injector PWM Bank 1 or 2 Average: This parameter displays
the average pulse width of the fuel injectors for each bank of the engine as determined
by the control module.
Int. CMP Angle Bank 1 or 2: This parameter displays the actual
intake camshaft position in degrees.
Int. CMP Bank 1 or 2 Command: This parameter displays the intake
camshaft position in percent of range as commanded by the control module.
Int. CMP Solenoid Bn. 1 or 2 Circuit Status: This parameter
displays the state of the intake camshaft actuator solenoid control circuit. The
parameter displays Fault if the camshaft actuator solenoid control circuit is open,
shorted to ground, or shorted to voltage. The parameter displays Indeterminate until
the circuit has been commanded ON.
Knock Retard: This parameter indicates the amount of spark advance
the control module removes from the ignition control (IC) spark advance in response
to the signal from the knock sensors.
KS 1 or 2 Signal: This parameters displays the
voltage input to the control module from the knock sensor (KS).
Loop Status Bn. 1 or 2 Sen. 1: This parameter
displays the state of the fuel control system as commanded by the control module.
Closed Loop operation indicates that the control module is controlling the fuel delivery
based off the oxygen sensors input signal. In Open Loop operation the control module
ignores the oxygen sensor input signal and bases the amount of fuel to be delivered
on other sensor inputs.
Loop Status Bn. 1 or 2 Sen. 2: This parameter
displays the state of the rear heated oxygen sensors as commanded by the control module.
The rear sensors will not go into Closed Loop until the ECM determines that the HO2S
is ready for operation.
LT FT Bn. 1 or Bn. 2 Cruise/Accel.: This parameter
displays the commanded Long Term Fuel Trim correction by the control module for bank 1
or bank 2 for cruise and acceleration conditions.
LT FT Bn. 1 or Bn. 2 Idle/Decel.: This parameter
displays the commanded Long Term Fuel Trim correction by the control module for bank 1
or bank 2 for idle and deceleration conditions.
MAF Sensor: This parameter displays the measured quantity of
air flowing into the engine during all operating conditions.
MAF Sensor: This parameter displays the signal voltage from
the mass air flow (MAF) sensor to the control module.
MIL Circuit Status: This parameter displays the state of the
MIL control circuit. The parameter displays Fault if the MIL control circuit is open,
shorted to ground, or shorted to voltage. This parameter displays indeterminate until
the circuit is commanded ON.
MIL Command: This parameter displays the commanded state of
the malfunction indicator lamp (MIL) control circuit by the control module.
Mileage Since DTC Cleared: This parameter displays the mileage
that has elapsed since any diagnostic trouble code (DTC) has been cleared from the
control modules memory.
Mileage Since First Failure: This parameter displays the mileage
that has elapsed since the first emission failure.
Mileage Since Last Failure: This parameter displays the mileage
that has elapsed since the last emission failure.
Mileage Since MIL Requested: This parameter displays the mileage
that has elapsed since the control module has commanded the malfunction indicator
lamp (MIL) On.
Misfire Current Cyl. 1-6: The scan tool displays a range
of 0-200 counts. This parameter displays the number of misfires that
have been detected during the last 200 cylinder firing events. The counters
may normally display some activity, but the activity should be nearly equal for all
of the cylinders, and in low numbers.
Misfire History Cyl. 1-6: The scan tool displays a range
of 0-65,535 counts. The misfire history counters display the total level
of misfire that has been detected on each cylinder. The misfire history counters will
not update or show any activity until a misfire DTC P0300 has become active.
The misfire history counters will update every 200 cylinder firing events.
Misfire Monitor Complete This Ignition: This parameter displays
the diagnostic monitor completion status during the current driving/monitoring cycle.
Misfire Heater Monitor Enabled This Ignition: This parameter
displays the diagnostic monitor enable status during the current driving/monitoring
cycle.
Moderate Brake Apply Signal: This parameter displays the state
of the brake pedal that is transmitted over the serial data circuit from the electronic
brake control module (EBCM).
PNP Switch: This parameter displays whether the transmission
range selector is in park or neutral.
Power Enrichment: This parameter displays the status of the
operating mode of the control module used to increase fuel delivery during certain
acceleration conditions.
Reduced Engine Power: This parameter displays whether the control
module is commanding reduced engine power due to a throttle actuator control (TAC)
system condition.
Short Term FT Bank 1 or Bank 2: This parameter
displays the short-term correction to the fuel delivery by the control module in response
to oxygen sensor 1 or 2. If the oxygen sensor indicates a lean air/fuel mixture,
the control module will add fuel increasing the short term fuel trim above 0.
If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce
fuel decreasing the short term fuel trim below 0.
Spark: This parameter displays the amount of spark advance the
control module is commanding on the ignition control circuits. The control module
determines the desired advance.
Starter Relay Circuit Status: This parameter displays the state
of the starter relay control circuit. The parameter displays Fault if the starter
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.
Start Up ECT: This parameter displays the temperature of the
engine coolant on start up based on input to the control module from the ECT sensor.
Start Up IAT: This parameter displays the temperature of the
intake air at start in the air induction system based on input to the control module
from the IAT sensor.
Stoplamp Pedal Switch: This parameter displays the position
of the stop lamp pedal switch input to the control module.
System Power Mode: This parameter displays the position of the
ignition switch.
TAC System Learned Counts: This parameter displays the steps
counted in learning the throttle actuator control parameters. The last step learned
is 11.
Torque Delivered Signal: This is the calculated torque output
from the engine to the transmission used by the EBTCM for the traction control system
operation.
Torque Request Signal: The EBTCM sends a Desired Torque Level
signal request to the control module. This decreases torque from the powertrain in
order to reduce wheel slip during acceleration for the traction control.
Total Fuel Trim Avg. Bank 1 or Bank 2: This parameter displays
the overall fuel trim from the idle/decel cell and the cruise/accel cell.
Total Misfire Count: This parameter displays the total number
of cylinder firing events that the control module detected as misfires for the last
200 crankshaft revolution sample period.
TP Desired Angle: This parameter displays the desired TP angle
commanded by the control module.
TP Indicated Angle: This parameter displays the percent of throttle
opening as calculated by the control module using information from the two TP sensors.
TP Sensor 1: This parameter displays the actual voltage on the
TP sensor 1 signal circuit as measured by the control module.
TP Sensor 1 Learned Minimum: This parameter displays the learned
minimum value of throttle position (TP) sensor 1 as recorded by the control
module during the last learn procedure.
TP Sensor 2: This parameter displays the actual voltage on the
TP sensor 2 signal circuit as measured by the control module.
TP Sensor 2 Learned Minimum: This parameter displays the learned
minimum value of TP sensor 2 as recorded by the control module during the last
learn procedure.
TP Sensor 1 and 2: This parameter displays Disagree when the
control module detects that TP sensor 1 voltage signal is not within the correct relationship
to TP sensor 2. The scan tool displays Agree under the normal operating conditions.
Traction Control Status: This parameter displays Active if the
electronic brake and traction control module (EBTCM) is commanding traction control.
Transmission Gear Selector Signal: This parameter displays
the position of the transmission gear selector that is transmitted over the serial
data circuit from the transmission control module (TCM).
Vehicle Security Status: This parameter displays the status
of the vehicle theft deterrent system.
Vehicle Speed: This parameter displays the speed of the vehicle
as calculated by the transmission control module (TCM) from information received
from the vehicle speed sensor (VSS).
Volumetric Efficiency: This parameter displays the calculated
volumetric efficiency of the engine as calculated by the control module.