Scan Tool Data Definitions Part 2

Cam Pulse: Display shows counts from 0 to 255. This parameter is the number of cam signal inputs to the PCM. The counter will reset after 255 counts are reached.

IC Mode: Display shows PCM or ICM. In PCM mode, the PCM controls the ignition timing. The PCM calculates the desired ignition timing based on information the PCM receives from the input sensors. In Ignition Control Module (ICM) mode, the ignition system operates independently from the PCM. The Ignition Control Module maintains a base ignition timing of 10 degrees BTDC and is able to change this ignition timing slightly with increased engine speed. Ignition control mode is in affect whenever an ignition control fault is detected while the engine is running and it will have a noticeable effect on driveability.

Spark: Display shows spark advance in degrees from -90 to 90. The negative number indicates degrees of advance (BTDC). This is a display of the spark advance calculation which the PCM is programming into the ignition system. The PCM computes the desired spark advance using data such as Engine Temperature, RPM, Engine Load, Vehicle Speed and Operating Mode.

Knock Retard: Display shows knock retard from 0 to 45 degrees. Which indicates the amount of spark advance in degrees that the PCM is removing from the Ignition Control (IC) in response to the Knock Sensor (KS) signal.

Knock Counter: Display is shown in counts from 0 to 255. Display shows the number of instances of engine detonation detected by the knock sensor in one-eighth of a second from 1 to 255.

MPH: Display shows vehicle speed in mph and km/h from 0 to 159 mph (0 to 255 km/h). The vehicle speed is converted into mph and km/h for display.

Throttle at Idle: Display shows No or Yes. This display indicates whether the TP Angle being monitored by the PCM is at 0 percent when the throttle is closed.

PNP: Display shows P-N- or -R-OD21. P-N- displayed indicates the gear select lever is in Park or Neutral. -ROD21 displayed indicates the gear select lever is in Reverse, Drive, or Low Range.

PSP Switch: Display shows Normal or Hi Press. The PCM compensates engine idle depending on steering load condition. Scan tool will display Hi Press. due to increase of power steering fluid pressure while turning the steering wheel. Scan tool displays Normal under no load condition.

TCC Brake Switch: Display shows Released or Applied This parameter indicates the state of the TCC brake switch circuit input. Released indicates a B+ voltage input brake switch closed - brake pedal released. Applied indicates a 0 voltage input brake switch open - brake pedal applied.

Ext Travel Brake: Display shows Released or Applied. This parameter indicates the state of the extended travel brake switch contacts of the torque management brake switch. Scan tool will display Released with the brake pedal released and Applied with the brake pedal applied.

TCC Slip Speed: Display shows TCC Slip Speed in RPM from 4096 to 4064. Display shows the amount of slip between the engine and transaxle input shaft.

Commanded EGR: Display shows commanded EGR position in percent from 0 to 100. Commanded EGR is the EGR pintle position which is being commanded by the PCM which should be very close to the Actual EGR Pos. display.

Actual EGR Pos: Display shows EGR position in percent from 0 to 100. Actual EGR position represents the linear EGR pintle position signal in percent of travel. 0% displayed indicates a closed EGR valve, EGR flow not allowed.

EGR Closed Valve Pintle Position: Display shows position in volts from 0.0 to 5.00. This display represents the voltage that the PCM uses to determine whether or not the EGR valve is fully closed, 0% pintle position.

EGR Pintle Pos: The EGR valve contains a potentiometer type position sensor that provides a voltage proportional to the pintle position. Pintle position is used by the PCM for Closed Loop control of valve pintle position to follow commanded position for diagnostics, and to correct fuel and spark for EGR.

Ignition 0: Displays voltage from 0 to 25.5. This represents the system voltage measured by the PCM at its Ignition 0 feed.

Start Up ECT: Displays start up ECT in °C/°F. This display is the ECT when engine start up occurred.

TP Angle: Display shows throttle angle in percent. Display is computed by the PCM from TP Sensor voltage. Display should read 0% at idle, 100% at wide open throttle (WOT).

EVAP 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 from 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 non-drive (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 Off 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.

Engine Coolant Lvl: Display shows coolant level as OK or Low. If the internal float is not suspended in coolant, Low will be displayed.

A/C Request: Display shows No or Yes. This display represents the state of the A/C request input from the A/C selection switch control assembly.

A/C Low Side Tmp: Display shows A/C Low Side Temp in degrees from -40°C (-40°F) to 85°C (215°F).

A/C High Side Temp: Display shows A/C High Side Temp in degrees from -13°C (9°F) to 215°C,(455°F).

A/C HI Pres. Sw: Display shows Normal or High Pressure. The A/C high pressure switch is normally closed. If the A/C pressure rises too high, the switch contacts open, interrupting the voltage signal to the PCM. The PCM deenergizes the A/C compressor control relay and the compressor stops running to prevent A/C system damage.

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.

Shift Mode Sw: Display shows Normal or Perf. This display shows the position of the transmission shift performance switch.

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, nonenergized, commanded state.

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.

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.

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 it 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 0DM #1 output circuits with fault being open or grounded.

Passkey Fuel: Display shows Enabled or Inhibited. This display is a input from the Pass-Key II module that tells the PCM to enable the injectors if the proper signal is received. The scan tool will normally display Enabled. If the Pass-key test has failed, the display will switch to Inhibited and the fuel system may be disabled.

Passkey Input: Display shows Enabled or Disabled and 0.0 to 984.6 ms. Scan tool will display Enabled after the Passkey II module has read the ignition key code and is allowing vehicle operation. Disabled will be shown if a system fault is detected.

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.

Odometer: Display shows miles from 0 to 1677722. This display is the actual vehicle miles stored in the PCM.

CL Fuel Control Sw. Point 02S: 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 Bn 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.

025 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 65535. 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 reenabled 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.