Scan Tool Data Definitions Part 1
SCAN TOOL DATA DEFINITIONS 1The 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.
5-Volt Reference 1
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 throttle position (TP) sensor , manifold absolute pressure (MAP) sensor , and exhaust gas recirculation (EGR) pintle position sensor.
5-Volt Reference 2
The scan tool displays 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 (FTP) sensor.
12-Volt Reference
The scan tool displays OK or Fault. This parameter indicates the state of the IGN 1 input to the powertrain control module (PCM).
24X Crank Sensor
The scan tool displays RPM. This parameter displays engine speed based on the correlation of crankshaft position (CKP) sensor A and B signals.
A/C High Side Pressure
The scan tool range is 0.00-5.00 volts. This parameter indicates the A/C high side pressure sensor input to the powertrain control module (PCM).
A/C Relay Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the A/C relay control circuit.
Air Fuel Ratio
The scan tool displays the powertrain control module (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.
AIR Pump Relay Command
The scan tool displays ON or OFF.
This parameter indicates the powertrain control module (PCM) commanded state of the secondary air injection (AIR) pump relays.
AIR Solenoid Command
The scan tool displays ON or OFF.
This parameter indicates the powertrain control module (PCM) commanded state of the secondary air injection (AIR) vacuum solenoid.
BARO
The scan tool range is 10-105 kPa. The barometric pressure (BARO) reading is determined from the manifold absolute pressure (MAP) sensor signal. The powertrain control module (PCM) monitors the MAP signal during key up and wide-open throttle (WOT) conditions. The BARO 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 crankshaft position (CKP) sensors A and B working properly, this parameter should display Angle. If the powertrain control module (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
The scan tool displays 0-16,384 RPM. This parameter indicates engine speed as calculated from the camshaft position (CMP) sensor signal.
CMP Sensor Signal Present
The scan tool displays Yes/No.
Crank Request Signal
The scan tool displays Yes or No. Yes is displayed when the key is in the Crank position.
Cruise Control Active
The scan tool displays Yes or No.
Cruise Inhibited Signal Command
The scan tool displays On or Off. On displayed indicates that the powertrain control module (PCM) is commanding the stepper motor cruise control (SMCC) module to inhibit cruise control operation.
Current Gear
The scan tool displays the numbers 1, 2, 3, or 4. The powertrain control module (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 range is 0-100. The parameter indicates which engine cycle of the 100 engine cycle test the powertrain control module (PCM) is collecting misfire data.
Desired EGR Position
The scan tool range is 0-100 percent. The parameter indicates the powertrain control module (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 powertrain control module (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.
ECT Sensor
The scan tool range is -40 to +150°C (-40 to +302°F). This parameter indicates the engine coolant temperature (ECT) based on input from the (ECT) sensor.
EGR Position Sensor
The scan tool range is 0-100 percent/0-5 volts. Represents the actual position of the exhaust gas recirculation (EGR) pintle in percent. Zero percent displayed indicates a fully extended pintle (EGR valve closed).
Engine Load
The scan tool range is 0-100 percent. This parameter indicates the calculated engine load based on engine speed, and mass air flow (MAF) sensor readings. The engine load increases with an increase in RPM or airflow.
Engine Oil Level Switch
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 Switch
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 0-16,384 RPM. This parameter indicates the engine speed calculated by the powertrain control module (PCM). The engine speed should remain close to desired idle under various engine loads with the engine idling.
EVAP Purge Solenoid Command
The scan tool range is 0-100 percent. This parameter indicates the powertrain control module (PCM) commanded duty cycle of the evaporative emission (EVAP) purge valve. A display of 0 percent indicates no purge while a display of 100 percent indicates full purge.
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 Test State
The scan tool displays Wait For Purge, Test Running, Test Complete. This parameter indicates the state of the EVAP Service Bay Test.
EVAP Vent Solenoid Command
The scan tool displays Venting / Not Venting. This parameter indicates the powertrain control module (PCM) commanded state of the EVAP vent solenoid.
Extended Travel Brake Pedal Switch
The scan tool displays Applied or Released. This parameter indicates the extended travel brake switch input to the powertrain control module (PCM).
FC Relay 1 Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the low speed cooling fans.
FC Relay 2 and S/P Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the series parallel, and the cooling fan 1 relay.
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 Level Sensor
The scan tool displays 0-5 volts. This parameter displays the fuel level input to the powertrain control module (PCM).
Fuel Pump Relay Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the fuel pump relay control circuit.
Fuel Tank Pressure Sensor
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 (FTP) sensor input to the powertrain control module (PCM). The PCM uses the signal to determine the FTP. The PCM uses the FTP sensor input to determine the status of the EVAP system diagnostics.