Part 3

Scan Tool Data Definitions (ECM) - continued

MAF Performance Test
- This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.

MAF Sensor
- The scan tool displays g/s. This parameter indicates the airflow into the engine as calculated by the control module based on mass airflow (MAF) sensor inputs. The scan tool will display a high value at higher engine speeds, and a low value at idle.

MAF Sensor
- The scan tool displays in Hz. This parameter indicates the frequency signal sent from the MAF sensor to the control module. the scan tool will display a high value indicates a higher engine speed. The scan tool will display a low value at idle.

MAP Performance Test 1
- This parameter displays the status of the MAP performance test 1 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.

MAP Performance Test 2
- This parameter displays the status of the MAP performance test 2 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.

MAP Sensor
- The scan tool displays kPa. This parameter displays the pressure inside of the intake manifold as calculated by the control module based on the input from the MAP sensor. The scan tool will display a high value at cruising speed or wide open throttle (WOT). The scan tool will display a low value at idle speed.

MAP Sensor
- This parameter displays the voltage signal from the MAP sensor to the control module. The scan tool will display a high value at cruising speed or wide open throttle (WOT). The scan tool will display a low vale at idle speed.

MIL Circuit Status
- This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK, Incomplete, Short B+, Short Gnd/Open. The scan tool will display OK/Incomplete if the circuit is operating correctly. The scan tool will display a fault if there is an open, short to ground, or a short to voltage on the circuit.

MIL Command
- This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check.

MIL Requested by DTC
- This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs.

Mileage Since DTC Cleared
- The scan tool displays km or miles. This parameter indicates the mileage accumulated since an emission diagnostic trouble code cleared.

Misfire Current Cyl. #1-8
- The scan tool will display in counts. This parameter indicates the number of cylinder firing events detected as possible misfires on each cylinder during the last 200 crankshaft revolutions as calculated by the control module. The scan tool will display a low number for a low number of cylinder misfire events. The scan tool will display a high number for a high number of cylinder misfire events.

Misfire History Cyl. #1-8
- The scan tool displays in counts. This parameter displays the total level of cylinder misfires that have been calculated for each cylinder by the control module. This parameter will not update or show activity until a misfire DTC has become active. The misfire history counters will update every 200 cylinder firing events.

Not Run Counter
- The scan tool displays the number of times a DTC diagnostic has not reached the predetermined criteria in order to run since the first DTC run failure.

Pass Counter
- The scan tool displays the number of times a DTC has run and passed.

PNP Switch
- This parameter displays whether the transmission range selector is in Park or Neutral.

Power Enrichment
- Scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the control module has detected conditions appropriate to operate in Power Enrichment mode. The control module commands Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the control module will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width.

Reduced Engine Power
- The scan tool displays Active or Inactive. The scan tool displays Active when the control module receives a signal from the throttle actuator control (TAC) module that a TAC system fault is occurring. The scan tool displays inactive when the engine is operating normally.

Short Term FT Avg. Bn 1
- The scan tool displays %. This parameter indicates the average short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.

Short Term FT Avg. Bn 2
- The scan tool displays %. This parameter indicates the average short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.

Short Term FT Bank 1
- The scan tool displays %. This parameter indicates the current short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.

Short Term FT Bank 2
- The scan tool displays %. This parameter indicates the current short term fuel trim for this bank. The scan tool will display a value higher than 0 if the time is being added to the injector pulse width, increasing the amount of fuel to that bank of the engine to compensate for a lean condition sensed by the oxygen sensors on that bank. The scan tool will display a value lower than 0 if time is being subtracted from the injector pulse width, reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensors on that bank. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.

Spark
- This parameter is the desired spark advance calculated by the control module based on many sensor inputs. The scan tool will display a lower value at idle speed, and a higher value under heavy acceleration and load conditions.

Starter Relay Circuit Status
- This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK, Incomplete, Short B+, Short Gnd/Open. The scan tool will display OK/Incomplete if the circuit is operating correctly. The scan tool will display a fault if there is an open, short to ground, or a short to voltage on the circuit.

Start-Up ECT
- This parameter indicates the engine coolant temperature at start-up, as calculated by the control module based on the input from the engine coolant temperature sensor. The scan tool will display a higher value at higher engine start-up temperatures, and a lower value at lower start-up temperatures.

Start-UP IAT
- Indicates the intake air temperature (IAT) at the time that the vehicle was started. Used to determine if the last start-up was a cold start. The scan tool range is -39 to +140°C (-38 to +284°F). This parameter indicates the ambient air temperature at start-up.

Stop Lamp Pedal Switch
- This parameter displays the state of the brake pedal as determined by the control module based on an input from the stop lamp pedal switch. This switch turns on the stop lamps when the brake pedal is depressed. The scan tool will display Applied when the brake pedal is depressed.

TAC Forced Engine Shutdown
- This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.

TAC Motor
- This parameter indicates the status of the TAC motor driver. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled.

TAC Motor Command
- This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position.

TCC/Cruise Brake Pedal Switch
- This parameter displays the position of the torque converter clutch (TCC) brake pedal switch input to the control module. The scan tool displays Applied, Released, or Invalid.

TCC Enable Solenoid Command
- This parameter displays the commanded state of the torque converter clutch (TCC) solenoid control circuit. The scan tool will display Enabled or disabled. Enabled indicates the TCC solenoid control circuit is being grounded by the control module, operating the torque converter. Disabled indicates the TCC solenoid is not being commanded on by the control module.

TCC PWM Solenoid Command
- This parameter indicates the commanded state of the TCC PWM Solenoid by the control module. The scan tool displays ON or OFF. The scan tool displays ON when the commanded state of the solenoid is ON. The scan tool displays OFF when the solenoid is OFF.

TCS Circuit Status
- This parameter indicates the diagnostic state of the output driver for the traction control system (TCS) circuit. The scan tool will display OK, Incomplete, Short B+, Short Gnd/Open. The scan tool will display OK/Incomplete if the circuit is operating correctly. The scan tool will display a fault if there is an open, short to ground, or a short to voltage on the circuit.

TCS Torque Request Signal
- This parameter indicates the percentage of available torque requested from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque.

TFP Switch
- This parameter displays the state of the Transmission Internal Mode Switch based on the signal from the IMS inside the transmission. The scan tool will display Drive 1, Drive 2, Drive 3, Drive 4, Park, Reverse, or Neutral. Drive 1 indicates the Transmission Range switches C and P are closed, connecting these circuits to ground. Drive 2 indicates the Transmission Range switches A and C are closed, connecting these circuits to ground. Drive 3 indicates that all of the Transmission Range switches are closed, connecting all four circuits to ground. Drive 4 indicates the Transmission Range switches B and C are closed, connecting these circuits to ground. Park indicates the Transmission Range A switch is closed, connecting the circuit to ground. Reverse indicates the Transmission Range switches A, B, and P are closed, connecting these circuits to ground. Neutral indicates the Transmission Range switches B and P are closed, connecting these circuits to ground.

Torque Management Spark Retard
- This parameter indicates how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving.

Torque Delivered Signal
- The scan tool displays lb ft or N.m. This parameter represents the pulse width modulation (PWM) signal which indicates the percent of available torque the engine is delivering to the drive wheels. The electronic brake/traction control module (EBCM) monitors the Traction Control Torque signal to ensure that the powertrain control module (PCM) is responding properly to the Traction Control Desired Torque signal.

Total Knock Retard
- This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.

Total Misfire
- The scan tool range is 0-255 counts. This parameter indicates 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 or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.

TP Desired Angle
- This parameter indicates the TP angle commanded by the control module. The scan tool will display a low value at idle, and a high value at wide open throttle (WOT).

TP Indicated Angle
- This parameter displays the angle of the throttle position (TP) in percent. This information is calculated by the control module using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.

TP Performance Test
- This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.

TP Sensor
- This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open.

TP Sensor
- This parameter displays the angle of the throttle position (TP) sensor in percent. This information is calculated by the control module using the signal from the throttle position sensor. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.

TP Sensor 1
- This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 1 of the throttle position (TP) sensor assembly. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open.

TP Sensor 1
- This parameter displays the angle of the throttle position (TP) sensor 1 in percent. This information is calculated by the control module using the signal from the throttle position sensor 1. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.

TP Sensors 1 and 2
- This parameter displays the results of a control module test that compares signals from the throttle position (TP) sensors 1 and 2. The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2.

TP Sensor 1 Indicated Position
- This parameter displays the angle of the throttle position (TP) sensor 1 as calculated by the control module using the signal from the TP sensor 1. The TP sensor 1 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open.

TP Sensor 2
- This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 2 of the throttle position (TP) sensor assembly. The scan tool will display a high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open.

TP Sensor 2
- This parameter displays the angle of the throttle position (TP) sensor 2 in percent. This information is calculated by the control module using the signal from the throttle position sensor 2. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.

TP Sensor 2 Indicated Position
- This parameter displays the angle of the throttle position (TP) sensor 2 as calculated by the control module using the signal from the TP sensor 2. The TP sensor 2 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open.

TR Switch
- This parameter indicates the current state of the gear select switch on the transmission/transaxle as calculated by the control module based on the TR switch. The scan tool status will switch from High to Low as different combinations are met. On the scan tool in Park, the PRNDL would read P and A will be Low, and B and C will be High.

TWC Temperature Calculated
- This parameter displays the catalytic converter temperature as calculated by the control module.

Vacuum Calculated
- This parameter displays the actual intake manifold vacuum of the engine. Intake manifold vacuum is calculated within the engine control module (ECM) by subtracting the manifold absolute pressure (MAP) sensor input reading from the barometric input reading.

Vehicle Speed Circuit Status
- This parameter displays the status of the Vehicle Speed Circuit. The scan tool will display OK, Incomplete, Short B+, Short Gnd/Open. The scan tool will display OK/Incomplete if the circuit is operating correctly.

Vehicle Speed Sensor
- This parameter indicates the vehicle speed calculated by the control module based on an input from the vehicle speed sensor (VSS). the scan tool will display a high value at higher vehicle speeds, and a low value at lower vehicle speeds.

VTD Auto Learn Timer
- The scan tool displays Active/Inactive. This parameter indicates if the control module is ready to learn the theft deterrent password. The scan tool will display active if the system is ready to learn. The scan tool will display inactive if the system has timed out or is not ready to learn the password.

VTD Fuel Disable
- This parameter Indicates if the VTD system has received proper information to enable or disable fuel. The scan tool will display Active or Inactive. The scan tool will display Active if the control module does not receive the correct password from the BCM. The scan tool will display Inactive if the control module receives the correct password from the BCM. If the system is Active, the engine will not start.

VTD Fuel Disable Until Ign. Off
- The scan tool will display Yes or No. This parameter indicates if the VTD is disabled until the ignition is turned OFF. The scan tool will display Yes if the ignition is ON and a theft deterrent DTC is present. The scan tool will display off if the system is OK and the theft deterrent system is inactive.

Warm-ups Since DTC Cleared
- This parameter indicates the number of warm-up cycles that have occurred Since DTCs were cleared. The scan tool will display a higher counts as more warm-up cycles have occurred since the DTCs were cleared.

Warm-ups w/o Emission Faults
- The scan tool displays in counts. This parameter counts the number of warm-up cycles without an emission fault present. The parameter increments until a fault occurs. If a fault occurs, the counter reverts to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also resets the counter to 0.

Warm-ups w/o Non-Emission Faults
- The scan tool displays in counts. This parameter counts the number of warm-up cycles without a non-emission fault present. The parameter increments until a fault occurs. If a fault occurs, the counter reverts to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also resets the counter to 0.

Wide Open Throttle
- This parameter indicates the throttle status commanded by the control module. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100 percent.