The Engine Scan Tool Data Definitions contains a brief description of all engine related parameters available on the scan tool. The list is 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.

12 Volt Reference: The scan tool displays OK or Fault. This parameter indicates the state of the IGN 1 input to the PCM.

24X Crank sensor (Data): The scan tool displays RPM. This parameter displays engine speed based on the correlation of CKP sensor A and B signals.

5 Volt Reference A: The scan tool displays OK or Fault. This parameter indicates the state of the 5 volt reference A circuit. This circuit supplies the reference voltage to the TP sensor , MAP sensor , and EGR pintle position sensor .

5 Volt Reference B: The scan tool display OK or Fault. This parameter indicates the state of the 5 volt reference B circuit. This circuit supplies the reference voltage to the A/C pressure sensor , and the fuel tank pressure sensor .

A/C Relay: The scan tool displays ON or OFF. This parameter indicates the PCM commanded state of the A/C Relay Control circuit.

Actual EGR Position: The scan tool range is 0-100 percent . Represents the actual position of the EGR pintle in percent. Zero percent displayed indicates a fully extended pintle (EGR valve closed).

Air Fuel Ratio: The scan tool displays the PCM commanded air to fuel. Air fuel ratio should normally be around 14.2:1 - 14.7:1. A lower air fuel ratio indicates a richer air to fuel mixture. A higher air fuel ratio indicates a leaner commanded air to fuel mixture.

Auto Learn Timer: The scan tool indicates ACTIVE or INACTIVE. This parameter indicates the status of the vehicle theft deterrent system password learn.

BARO: The scan tool range is 10-105 kPa / 0.00-5.00 volts. The barometric pressure reading is determined from the MAP sensor signal. The PCM monitors the MAP signal during key up and wide-open throttle (WOT) conditions. The barometric pressure compensates for altitude differences.

CKP sensor Status: The scan tool displays Angle, Time A or Time B. This parameter indicates the engine position sensing mode. With both CKP sensor s A and B working properly, this parameter should display Angle. If the PCM detects an incorrect condition with CKP sensor A, the PCM will command TIME B mode. If the PCM detects an incorrect condition with CKP sensor B, the PCM will command Time A mode.

CMP sensor (Data): The scan tool displays 0-16384 RPM. This parameter indicates engine speed as calculated from the CMP sensor signal.

Brake Switch: The scan tool displays Applied or Released. This parameter indicates the state of the brake switch circuit input. Open indicates 0.0 voltage input (brake switch open, brake pedal applied). Closed indicates a B+ voltage input (brake switch closed, brake pedal released). When you apply the vehicle brakes, the scan tool display shows Applied. The torque converter clutch and cruise control disengages. When you release the vehicle brakes, the scan tool displays Released. This allows the cruise control to be resumed and the torque converter clutch to engage.

Crank Request: The scan tool displays Yes or No. Yes is displayed when the key is in the Crank position.

Cruise Inhibited Signal Command: The scan tool displays Yes or No. Yes displayed indicates that the PCM is commanding the SMCC module to inhibit cruise control operation. Should display Yes with park, neutral, reverse or low gear selected.

Cruise Requested: The scan tool displays YES or NO. With cruise control engaged, this parameter indicates YES.

Current Gear: The scan tool displays the numbers 1, 2, 3, or 4. The PCM looks at trans range position and the gear commanded by the PCM. The actual forward gear that the transaxle is in will be the lower of the two because the manual valve can override the PCM commanded gear. The scan tool displays which gear the transmission is in.

Cycles Of Misfire Data: The scan tool displays 0-100. This parameter indicates which cycle of the 100 engine cycles that the PCM collects misfire data.

Desired EGR Position: The scan tool range is 0-100 percent . The parameter indicates the PCM commanded EGR pintle position. The desired EGR position should stay close to actual EGR position.

Desired Idle Speed: The scan tool range is 0-3187 RPM. The PCM commands the desired idle speed. The PCM compensates for various engine loads based on engine coolant temperature in order to keep the engine at the desired speed.

Desired Torque ABS/TCS: The scan tool displays 0-100 percent . This parameter indicates the desired amount of torque requested by the EBTCM.

ECT: The scan tool range is -40°C to 140°C (-40°F to 284°F). This parameter indicates the engine coolant temperature based on input from the engine coolant temperature sensor .

EGR Closed Pintle Position: The scan tool range is 0-255 counts. This parameter indicates the closed valve position of the EGR in counts.

EGR Flow Test Count: The scan tool range is 0-255 counts. This parameter Indicates the number of EGR flow test samples collected during the current ignition cycle.

EGR Pintle Position: The scan tool range is 0.00-5.00 volts. This parameter Indicates the EGR pintle position sensor signal voltage being monitored by the PCM. A low voltage indicates a fully extended pintle (closed valve). A voltage near 5 volts indicates a fully retracted pintle (open valve).

Engine Load: The scan tool range is 0-100 percent . This parameter indicates the calculated engine load based on engine speed, and MAF sensor readings. The engine load increases with an increase in RPM or airflow.

Engine Oil Level: The scan tool displays OK or Low. The parameter displays Low if the engine oil level remains low (about 1 quart or more) for a sufficient period of time.

Engine Oil Pressure: The scan tool displays OK or Low. This parameter displays whether or not sufficient engine oil pressure is present.

Engine Run Time: The scan tool displays Hours, Minutes, Seconds. This indicates the amount of engine run time. When the ignition is cycled off, the timer will reset to zero.

Engine Speed: The scan tool range is 0 to 16384 RPM. This parameter indicates the engine speed calculated by the PCM. The engine speed should remain close to desired idle under various engine loads with the engine idling.

EVAP Canister Purge: The scan tool range is 0-100 percent . This parameter indicates the PCM commanded duty cycle of the EVAP purge valve. a display of 0 percent indicates no purge while a display of 100 percent indicates full purge.

EVAP Purge Solenoid: The scan tool displays ON or OFF. This parameter indicates the PCM commanded state of the EVAP canister purge valve.

EVAP Test Abort Reason: The scan tool displays Not Aborted, Lost Enable, Small Leak, Veh. Not at Rest. This parameter indicates the reason the EVAP system test was aborted.

EVAP Test Result: The scan tool displays No Result, Aborted, Passed, Failed-DTC P0440, Failed-DTC P0442, Failed-DTC P0446, Failed-DTC P1441. This parameter indicates the results of the EVAP system tests.

EVAP Vent Sol.: The scan tool displays Open or Closed. This parameter indicates the PCM commanded state of the EVAP vent solenoid.

Extended Travel Brake: The scan tool displays Applied, or Released. This parameter indicates the extended travel brake switch input to the PCM.

Fuel Level: The scan tool displays Liters, Gallons. This parameter displays the volume of fuel in the tank based on input from the fuel level sensor .

Fuel Pump Relay: The scan tool displays ON or OFF. This parameter indicates the PCM commanded state of the fuel pump relay control circuit.

Fuel Tank Pressure: The scan tool range -17.5 to 7.5 inches H2O (-33 to 14 mmHg) / 0 to 5 volts. This parameter indicates the fuel tank pressure sensor input to the PCM. The PCM uses the signal to determine the fuel tank pressure. The PCM uses the fuel tank pressure sensor input to determine the status of the EVAP system diagnostics.

FT Cell: This parameter indicates the current FT cell.

Generator L Terminal: The scan tool displays OK or No Output. This parameter indicates the PCM commanded state of the generator L terminal. The PCM uses the L terminal to command the generator voltage regulator ON and OFF.

Generator PWM: The scan tool displays 0-100 percent . This parameter indicates the generator field duty cycle as commanded by the voltage regulator. The PCM monitors the duty cycle using the generator F terminal circuit.

HO2S bank 1 sensor 1: The scan tool range is 0-1275 mV (0-1.275 volts). This parameter indicates the output voltage for HO2S bank 1 sensor 1 (rear bank fuel control oxygen sensor). The voltage should fluctuate constantly within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop.

HO2S Bank 1 Sensor 2: The scan tool range is 0-1275 mV (0-1.275 volts). This parameter indicates the output voltage for HO2S bank 1 sensor 2 (post catalyst oxygen sensor). The voltage should fluctuate within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop. The post-catalyst HO2S output voltage will fluctuate slowly over a longer period of time, compared to the fuel control oxygen sensor s. This is due to the oxygen storage capacity of an efficiently operating catalyst.

HO2S Bank 2 Sensor 1: The scan tool range is 0-1275 mV (0-1.275 volts). This parameter indicates the output voltage for HO2S bank 2 sensor 1 (front bank fuel control oxygen sensor). The voltage should fluctuate constantly within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop.

HO2S Warm-up Bn1 Sen 2: The scan tool displays Seconds. This parameter indicates the time to warm-up for HO2S bank 1 sensor 2.

IAC Position: The scan tool range is 0-255 counts. This parameter displays the PCM commanded position of the idle air control pintle in counts. A larger number of counts indicates a retracted IAC valve which allows more air the idle air passage. The IAC position should respond quickly to changes in engine load in order to maintain the desired idle RPM.

IAT: The scan tool range is -40°C to 140°C (-40°F to 284°F). This parameter indicates the temperature of the intake air based on the signal voltage from the intake air temperature sensor .

IC Ckt. Cyl. 1 / IC Ckt. Cyl. 2 / IC Ckt. Cyl. 3 / IC Ckt. Cyl. 4 / IC Ckt. Cyl. 5 / IC Ckt. Cyl. 6 / IC Ckt. Cyl. 7 / IC Ckt. Cyl. 8 Status of Last Test : The scan tool displays Pass / Open / Short to Ground / Short to Volts. These parameters display the status of the last test for the ignition control circuits for cylinders 1 through 8.

Ignition 0: The scan tool displays ON, or OFF. This parameter indicates the status of the ignition 0 input to the PCM.

Ignition 1: The scan tool range is 0-25.5 volts. This parameter indicates the system voltage detected by the PCM.

Injector PWM bank 1: The scan tool range 0-985 milliseconds. This parameter indicates the PCM commanded pulse width for the bank 1 injectors.

Injector PWM bank 2: The scan tool range 0-985 milliseconds. This parameter indicates the PCM commanded pulse width for the bank 2 injectors.

IPC Fuel Disable: The scan tool displays Active, or Inactive. This parameter indicates the status of the theft deterrent fuel disable command.

Knock Retard: The scan tool range 0-45 degrees. This parameter indicates the amount of timing retard commanded by the PCM.

Long Term FT Avg. Bn1: The scan tool range is -99 to 99 percent . This parameter indicates the average Long Term FT correction for bank 1 calculated by the PCM during the current ignition cycle.

Long Term FT Avg Bn 2: The scan tool range is -99 to 99 percent . This parameter indicates the average Long Term FT correction for bank 2 calculated by the PCM during the current ignition cycle.

Long Term FT bank 1: The scan tool range is -99 to 99 percent . This parameter indicates the Long Term FT correction for bank 1 as commanded by the PCM.

Long Term FT bank 2: The scan tool range is -99 to 99 percent . This parameter indicates the Long Term FT correction for bank 2 as commanded by the PCM.

Loop Status: The scan tool displays Open, or Closed. This parameter indicates the state of the fuel control system. A CLOSED display indicates that the PCM is using the signals from the heated oxygen sensor s to control the fuel system.

Loss of Match Counter: The scan tool range is 0-255 counts. This parameter indicates the loss of CKP sensor A and CKP sensor B signal correlation.

Low Res. Ref. Pulses: The scan tool range is 0-255 counts. This parameter indicates the low res reference signal calculated by the PCM. The PCM determines the low res signal from CKP sensor s A and B.

Low Speed Fan Relay: The scan tool displays ON, or OFF. This parameter indicates the PCM commanded state of the low speed cooling fans.

MAF: The scan tool range is 0-655 grams per second (g/s). This parameter indicates the volume of air entering the engine.

MAF Frequency: The scan tool range is 0-65535 Hz. This parameter indicates the MAF sensor frequency based on the volume of air entering the engine. The PCM converts the signal frequency to grams per second (g/s).

MAP: The scan tool range is 10-105 kPa / 0-5 volts. This parameter indicates the manifold absolute pressure sensor input to the PCM.

Med. Res. Ref. Pulses: The scan tool range 0-255 counts. This parameter indicates the reference pulses based on the CKP signal input.

MIL: The scan tool displays ON, or OFF. This parameter indicates the PCM commanded state of the malfunction indicator lamp (MIL).

Misfire Current #1 through #8: The scan tool range is 0-255 counts. This parameter indicates the possible misfires being detected on each cylinder during the last 2000 cylinder firing events. The counters may normally display some activity, but the activity should be very low and equal for all cylinders.

Misfire Cycle Delay Counter: The scan too range is 0-255 counts. If the misfire diagnostic is interrupted, due to vehicle operation outside the conditions for running DTC P0300, this parameter indicates the number of engine cycles left before the test misfire test is re-enabled.

Misfire History #1 through #8: 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.

Non-Driven Wheel Speed: The scan tool range is 0-255 km/h (0-158 mph). This parameter indicates the speed of the rear wheels. The PCM receives the information from the EBTCM via class 2 serial data.

Odometer: The scan tool range is 0-1677722. This parameter indicates the actual vehicle miles stored in the PCM.

PCM Ride Control Signal: The scan tool displays NORMAL, or FIRM.

Short Term FT bank 1: The scan tool range is -99 to 99 percent . This parameter indicates the Short Term FT correction for bank 1 as commanded by the PCM.

Short Term FT bank 2: The scan tool range is -99 to 99 percent . This parameter indicates the Short Term FT correction for bank 2 as commanded by the PCM.

Short Term FT Avg Bn 1: The scan tool range is -99 to 99 percent . This parameter indicates the average Short Term FT correction for bank 1 calculated by the PCM during the current ignition cycle.

Short Term FT Avg Bn 2: The scan tool range is -99 to 99 percent . This parameter indicates the average Short Term FT correction for bank 2 calculated by the PCM during the current ignition cycle.

SP/High Speed Fan Relays: The scan tool displays ON, or OFF. This parameter indicates the PCM commanded state of the series parallel, and the cool fan 1 relays.

Spark: The scan tool range is 0-64 degrees. This parameter indicates the amount of spark advance commanded by the PCM.

Start-up ECT: The scan tool range is -40°C to 140°C (-40°F to 284°F). This parameter indicates the engine coolant temperature at start-up.

Starter Relay Status: The scan tool displays ON, or OFF. This parameter indicates the PCM commanded state of the starter relay control circuit.

TCC Brake Switch: The scan tool displays Applied, or Released. This parameter indicates the state of the torque converter clutch brake switch.

TCC Slip Speed: The scan tool range is 0-8192 RPM. This parameter indicates the amount of slip between the engine and transaxle input shaft.

Total Misfire Current Count: The scan tool range is 0-255 counts. This parameter indicates the total number of cylinder firing events that were detected as being misfires during the last 200 crankshaft revolution sample period.

TP Angle: The scan tool range is 0-100 percent . This parameter indicates the throttle angle calculated by the PCM from the TP sensor voltage input.

TP sensor : The scan tool range is 0-5 volts. This parameter indicates the TP sensor voltage input to the PCM.

Traction Control Torque: The scan tool range is 0-100 percent . This parameter indicates the available torque that the engine is delivering to the drive wheels.

Vehicle Speed: The scan tool range is 0-255 km/h (0-158 mph). This parameter indicates the vehicle speed calculated by the PCM from the vehicle speed sensor .

VTD Password: The scan tool displays OK, or Incorrect. This parameter indicates the validity of the vehicle theft deterrent password.