Scan Tool Data Definitions Part 2
Part 2EVAP Vacuum Sw: Display shows No Flow or Purging. The EVAP purge vacuum switch is a normally closed switch positioned in the purge line between the canister and the EVAP purge solenoid. The EVAP purge vacuum switch will open when vacuum increases to greater than five inches of water in the purge line. The EVAP purge vacuum switch is used by the PCM to monitor EVAP canister purge solenoid operation and purge system integrity. The EVAP purge vacuum switch should be closed to ground with no vacuum present, 0% EVAP purge solenoid PWM. With EVAP purge solenoid PWM at 25% or greater the EVAP purge vacuum switch should open and purge should be indicated.
EVAP Sol: Display shows EVAP Purge solenoid in percent from 0 to 100. The evaporative emission purge valve solenoid is a proportional signal used to control the evaporative emission canister purge function. 0% means the valve is commanded fully closed while 100% means that the valve is commanded fully open.
Air Fuel Ratio: Display shows Air Fuel Ratio from 0 to 1 to 25.5 to 1. Display indicates the air fuel ratio based on oxygen sensor inputs. The PCM uses fuel trims to adjust fueling to attempt to maintain an air fuel ratio of 14.7 to 1.
Power Enrichment: Display shows Inactive or Active. The scan tool indicates when Power Enrichment mode is active, moderate to heavy acceleration.
Traction Control: Display shows Inactive or Active. Display will show Active if the PCM receives a signal from the Electronic Brake and Traction Control Module (EBTCM) requesting torque reduction during a traction control maneuver.
Des. Torque Lvl: Display shows Desired Torque Level in percent from 0 to 100. The EBTCM sends a Desired Torque Level signal request to the PCM to decrease torque output form the powertrain to reduce wheel slip during acceleration for traction control.
Non-Driven Wheel Speed: Display shows MPH / km/h from 0 to 158 MPH, 0 to 255 km/h. This display is the nondrive (rear) wheel speed sent to the EBTCM, used for traction control and Anti-Lock braking and is monitored by the PCM.
Traction Control Delivered Torque: Display shows percent from 0 to 100. This is the calculated torque output from the engine to the transaxle used by the EBTCM for traction control system operation.
Service Spark Retard: Display shows degrees from 0 to 4. This displays the amount of spark retard in degrees from the base spark timing of 10 degrees before top dead center. Service Spark Retard is used to compensate for poor fuel quality or low octane fuel. It can only be adjusted with a scan tool. If the battery is disconnected the service spark retard setting will reset to zero.
Ref. Volts Low: Display shows Ignition Ground Voltage in volts Display shows the voltage difference between ignition ground and PCM ground shifted 2.5 volts. A reading of 2.500 volts means the ignition and the PCM grounds are at the same voltage. A reading of 1.000 volt means the ignition ground voltage is 1.5 volts lower than the PCM ground. A reading of 3.500 volts means the ignition ground voltage is 1.0 volt above the PCM ground. Display shows Ignition Ground Voltage level from 0.003 to 4.970.
4X Ref. Counter: Display shows counts from 0 to 255. This is the number of 4X reference pulses between cam pulses. The normal amount of pulses should be 8 with engine running.
Ign. Cycle Cnter: Display shows counts from 0 to 50. The counts increase by one with each On to Off key cycle. When a DTC sets, the counter is set to zero. If the DTC becomes history, the counter will increment with each key cycle until another DTC is set, or until the key has been cycled at which time the DTC will be erased.
A/C Relay: Display shows A/C relay On or Off. This display represents the commanded state of the A/C Clutch Control Relay. Clutch should be engaged when On is displayed.
FC Relay 1: Display shows Fan Control Relay state as On or Off. When the PCM is commanding the Fan 1 Relay On, the scan tool display will switch from Oft to On.
FC Relay 2 and 3: Display shows Fan Control Relay state as On or Off. When the PCM is commanding the Fan 2 and 3 Relays On, the scan tool display will switch from Off to On.
Outside Air Temp: Display shows -40°C (-40°F) to 102°C (215°F). This is the outside temperature sent from the HVAC to the PCM across the data link.
Engine Oil Level: Display shows Oil Level OK or Low. The PCM monitors the engine Oil Level switch. When Oil Level drops approximately two quarts below full, display will show Low.
Engine Oil Life: Display shows Engine Oil Life in percent from 0 to 100. This display represents the Engine Oil Life Index that is calculated and maintained by the PCM.
Trans. Oil Temp: Display shows -40°C (-40°F) to 215°C (419°F). This is the Transaxle Oil Temperature in degrees.
Trans. Oil Life: Display shows Transaxle Oil Life in percent from 0 to 100. This display represents the Transaxle Oil Life Index that is calculated and maintained by the PCM.
Shift Solenoid 1: Display shows shift solenoid 1 as On or Off. When the automatic transaxle is in first or fourth gear, the scan tool should display On. When the transaxle is in second or third gear, the scan tool should display Off.
Shift Solenoid 2: Display shows shift solenoid 2 as On or Off. When the automatic transaxle is in first or second gear, the scan tool should display On. When the transaxle is in third or fourth gear, the scan tool should display Off.
Commanded Gear: Display shows Commanded Gear as 1, 2, 3 or 4. This display is the decoded value converted to 1, 2, 3 or 4 from the state of the solenoids, PCM commanded.
Trans. Range: Display shows Drive 1, Drive 2, Drive 3, Drive 4, Reverse, P/N, or Invalid. This is the decoded manual valve position from the transaxle range pressure switch.
Trans Range A/B/C: Display shows ON or OFF. This shows the state of the three outputs from the transaxle range pressure switch which is used to indicate the actual manual valve position.
TCC: Display shows TCC as Disengaged or Engaged. This display is the commanded state of the viscous Torque Converter Clutch.
TCC Duty Cycle: Display shows viscous TCC Duty Cycle in percent from 0 to 100. This parameter is the commanded percent of ON time of the TCC solenoid. 100% represents an On, energized, commanded state. 0% represents a Off, non-energized, commanded state.
Engine Oil Pres: Display shows OK or Low. Display will show OK if the Oil Pressure is above 4.5 PSI.
Brake Boost. Vac: Display shows Brake Booster Vacuum in kilopascals (Kpa) and voltage from -10 to 84 kPa, 0.00 to 5.00 volts. This display is the signal from the Brake Booster Vacuum Sensor attached to the vacuum booster assembly.
Sel. Lever Sw: Display shows Invalid, Drive 4, Drive 3, Reverse, P/N, Drive 1, Drive 2. This display is the decoded transaxle range, from the 4 PRNDL inputs.
Sel Level Sw A/B/C/P: Display shows ON/OFF for each of the four PRNDL inputs. ON = open circuit, OFF = grounded circuit.
Malfunction Ind. Lamp Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) A output # 1 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
PCM Ride Control Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) B output # 1 for an open or shorted condition if one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
PCM Ride Control: Display shows Normal or Firm. This parameter is the operating mode that the ride control is operating at, for vehicle stability.
Vehicle Speed Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) A output # 2 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Tachometer Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) A output # 3 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Delivered Torque Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) A output # 4 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
EVAP Purge Sol. Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) A output # 5 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Air Conditioning Relay Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) B # 3 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Cruise Requested: Display shows No or Yes. The display represents the state of the cruise request input from the cruise control switch.
Cruise: Display shows cruise state as Disabled or Enabled. If the PCM detects conditions that the vehicle is operating under that cruise should not be allowed, I.E. low vehicle speed, it will send out a signal to disable cruise. If cruise will be allowed it will send out a signal to enable cruise.
Cruise Enable Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) B # 4 for an open or shorted condition. If one of the conditions exists the fault line will go Low. The scan tool will display the condition that is present.
Shift Solenoid 1 Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) # 2 output # 5 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Shift Solenoid 2 Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) # 2 output # 6 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
TCC Solenoid Driver: Display shows OK, Open/Short, Over Current. The PCM monitors output driver (0DM) # 2 output # 7 for an open or shorted condition. If one of the conditions exists the fault line will go low. The scan tool will display the condition that is present.
Driver 1 Ground: Display shows OK, Over Voltage, Over Current. This displays the state of 0DM # 1's input circuit.
Driver 2 Ground: Display shows OK, Over Voltage, Over Current. This displays the state of 0DM # 2's input circuit.
Quad Driver 1: Display shows OK or Fault. This displays the state of QDM # 1 output circuits with fault being open or grounded.
Injector 1 thru 8: Fault Display shows OK or Fault. Scan tool will display fault if the PCM has detected an improper voltage level in any of the fuel injectors circuits to determine if any of the eight injectors are misfiring.
VTD Fuel Cont: Display shows No or Yes. The Vehicle Theft Deterrent (VTD) controller will not disable fuel on initial start-up. The VTD must receive the correct message from the ignition lock assembly before reaching the fuel continue/disable point. If the correct message is not received, fuel injection will be disabled for 10 minutes.
IPC Fuel Disabled: Display shows Inactive or Active. The IPC will send out a fuel disable message to the PCM if the incorrect message from the ignition lock assembly has been received.
VTD Password: Display shows OK or Incorrect. The PCM will store a learned password that it receives from the vehicle theft deterrent (VTD) module. The display will show if the password that was sent was the correct password.
Auto Learn Timer: Display shows Inactive or Active. The auto learn timer is the indication if the Vehicle Theft Deterrent (VTD) is in learn mode and has not timed out.
VTD Password Learn Mode: Display shows Inactive or Active. The learn mode must be active for the PCM to learn the correct password from the Vehicle Theft Deterrent (VTD) system. This allows learning for the replacement of the PCM.
Odometer: Display shows miles from 0 to 1677722. This display is the actual vehicle miles stored in the PCM.
CL Fuel Control Sw. Point O2S: Display shows millivolts from 0 to 1107. This is the oxygen sensor voltage at which closed loop is achieved.
HO2S Warm Up Time Bn 1 Sen. 1: Display shows minutes and seconds from 0:00 to 4:15. This parameter is how much time it takes for the oxygen sensor to start its voltage swings over the rich/lean threshold.
HO2S Warm Up Time Sn 2 Sen. 1: Display shows minutes and seconds from 0:00 to 4:15. This parameter is how much time it takes for the oxygen sensor to start its voltage swings over the rich/lean threshold.
02S X Counts Bn 1: Display shows counts from 0 to 255. This display is the number of times the oxygen sensor voltage crosses over the rich/lean threshold during a one second interval.
02S X Counts Bn 2: Display shows counts from 0 to 255. This display is the number of times the oxygen sensor voltage crosses over the rich/lean threshold during a one second interval.
HO2S Lean/Rich Transition Time Bn 1 Sen. 1: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the lean threshold to the rich threshold.
HO2S Rich/Lean Transition Time Bn 1 Sen. 1: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the rich threshold to the lean threshold.
HO2S Lean/Rich Transition Time Bn 2 Sen. 1: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the lean threshold to the rich threshold.
HO2S Rich/Lean Transition Time Bn 2 Sen. 1: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the rich threshold to the lean threshold.
HO2S Lean/Rich Transition Time Bn 1 Sen. 2: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the lean threshold to the rich threshold.
HO2S Rich/Lean Transition Time Bn 1 Sen. 2: Display shows time in milliseconds from 0.0 to 3187.5 ms. Display is the time for the HO2S voltage to change from the rich threshold to the lean threshold.
Calc. TWC Temp: Display shows temperature in degrees C and degrees F from 0°C (32°F) to 765°C (1409°F). This parameter is the PCM calculated temperature of the Three Way Catalyst.
Lean/Rich Switch Bn 1 Sen. 1: Display shows counts from 0 to 65535. This displays the number of counts when the HO2S voltage swings above the rich mean threshold.
Rich/Lean Switch Bn 1 Sen. 1: Display shows counts from 0 to 65535. This displays the number of counts when the HO2S voltage swings below the lean mean threshold.
Lean/Rich Switch Bn 2 Sen. 1: Display shows counts from 0 to 65535. This displays the number of counts when the HO2S voltage swings above the rich mean threshold.
Rich/Lean Switch Bn 2 Sen. 1: Display shows counts from 0 to 65535. This displays the number of counts when the HO2S voltage swings below the lean mean threshold.
Lean/Rich Switch Bn 1 Sen. 2: Display shows counts from 0 to 65535. This displays the number of counts when the HO2S voltage swings above the rich mean threshold.
Rich/Lean Switch Bn 1 Sen. 2: Display shows counts from 0 to 85535. This displays the number of counts when the HO2S voltage swings below the lean mean threshold.
Misfire Hist. # 1 (thru) # 8: Display shows counts from 0 to 65535. 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 Passes: Display shows counts from 0 to 65535. The Misfire Passes counter shows the relative number of passed misfire tests since P0300 went active.
Misfire Failures: Display shows counts from 0 to 65535. The Misfire Failure counter shows the relative number of failed misfire tests since P0300 went active. Cycles of Misfire Data: Display shows counts from 0 to 100. Displays which engine cycle of the 100 engine cycle test the PCM is collecting data for P0300.
Misfire Cycle Delay Counter: Display shows counts from 0 to 255. If the misfire test is interrupted, due to the vehicle coming outside the test conditions for P0300, this display will show the number of engine cycles left before the test is re-enabled and data collection will resume.
Revs. w/Misfire: Display shows counts from 0 to 200. The counts displayed are the number of misfires counts detected in the last misfire test. A misfire count is two times the number of misfires.
Msf. Rev. Status: Display shows Accepted or Rejected. Accepted means the misfires are valid misfires. Rejected means the misfires were not actual misfires but an indication rough road.
Total Misfire: Display shows counts from 0 to 255. This display indicates the total number of cylinder firing events that were detected as being misfires during the last 200 crankshaft revolution sample period.
Misfiring Cyl: Display shows Primary Cyl. 1-8 and Secondary Cyl. 1-8. If a misfire is present this display will show the primary missing cylinder and if more than one, the secondary missing cylinder. If no misfire is present the display will not show a number.
Misfire Cur. # 1 (thru) # 8: Display shows Misfire Current counters increment at a rate according to the number of possible misfires being detected on each cylinder during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all the cylinders.
RPM at Misfire: Display shows RPM at which DTC P0300 was set. When a misfire is detected, the PCM will store the RPM at which the misfire occurred.
Load at Misfire: Display shows load in percent at which DTC P0300 was set. When a misfire is detected, the PCM will store the percent of load at which the misfire occurred.
ECT at Misfire: Display shows ECT in degrees at which DTC P0300 was set. When a misfire is detected, the PCM will store the ECT in degrees at which the misfire occurred.