Scan Tool Data Definitions - Instrument Panel

8 DIGIT GM PART NUMBER: Displays the part number for the control module.

ABS INPUT: Displays Off or On. The status of the discrete back-up ABS indicator signal. The instrument cluster uses this input to determine illumination of the ABS indicator when the instrument cluster loses communication with the electronic brake control module (EBCM).

BATTERY VOLTS: Displays 0 to 255 Volts. The battery voltage level at the instrument cluster.

BRAKE FLUID LEVEL: Displays OK or Low. The status of the discrete brake fluid level switch signal. The instrument cluster uses this input to determine illumination of the BRAKE indicator and display of the CHECK BRAKE FLUID message on the DIC.

CALIBRATION ID: Displays the calibration ID for the control module.

COMPONENT SERIAL #8-11: Digits 8 to 11 of the component serial number of the control module.

COMPONENT SERIAL #12: Digit 12 of the component serial number of the control module.

COMPONENT SERIAL #13-16: Digits 13 to 16 of the component serial number of the control module.

COMPONENT SERIAL #17-18: Digits 17 to 18 of the component serial number of the control module.

DISPLAY MODE SWITCH: Displays Off or On. The status of the discrete DSPL MODE switch signal. The instrument cluster uses this input to determine the state of the instrument cluster display.

DiSPLAY TRIP RESET SW.: Displays Off or On. The status of the discrete TRIP RESET switch signal. The instrument cluster uses this input to determine when to reset the trip odometer currently displayed.

ECT: Displays -40°C to 215°C (-40°C to 419°F). The temperature of the engine coolant.

ENGINE OIL LEVEL: Displays OK or Low. The status of the discrete engine oil level switch signal. The PCM monitors the engine oil level switch and when the engine oil level is low, the PCM requests via class 2 serial data message that the instrument cluster display the CHECK OIL LEVEL message on the DIC.

ENGINE SPEED: Displays from 0 to 7000 RPM. The current engine speed reported to the instrument cluster by the powertrain control module (PCM) via the discrete tachometer signal. The value should match the tachometer display.

ENGINE SPEED: DISPLAYS FROM 0 to 10000 RPM. The PCM calculates engine speed from ignition reference pulses. The engine speed should remain close to desired idle under various engine loads with engine idling.

ENGLISH/METRIC SW.: Displays Off or On. The status of the discrete ENG/MET switch signal. The instrument cluster uses this input to determine the units of the instrument cluster display.

FLUORESCENT LIGHT: Displays 0 to 100%. The fluorescent light level of the instrument cluster.

FUEL LEVEL: DISPLAYS 0 to 70 L (0 to 18.5 gal). The PCM monitors the fuel level sensor and sends the fuel level to the instrument cluster via class 2 serial data message. The instrument cluster displays the proportional fuel level and when fuel level is less than 11.4 L (3 gal), the instrument cluster displays the FUEL LEVEL LOW message on the DIC and requests a single pulse chime.

IGNITION 1: Displays Off or On. The status of the discrete ignition positive voltage signal.

IMS: Displays PARK, REVERSE, NEUTRAL, DRIVE 4, DRIVE 3, DRIVE 2, DRIVE 1 OR INVALID. If a valid combination of inputs is not received by the PCM, INVALID will be displayed. This display is the decoded status of the four A/B/C/P inputs from the automatic transmission internal mode switch. If a valid combination of inputs is not received by the PCM, INVALID will be displayed.

INFO. RESET SWITCH: Displays off or On. The status of the discrete INFO RESET switch signal. The instrument cluster uses this input to determine when to reset the vehicle information parameter currently displayed.

INFORMATION DOWN SWITCH: Displays Off or On. The status of the discrete INFO Down switch signal. The instrument cluster uses this input to determine which vehicle information parameter to display next.

INFORMATION UP SWITCH: Displays Off or On. The status of the discrete INFO Up switch signal. The instrument cluster uses this input to determine which vehicle information parameter to display next.

JULIAN DATE OF BUILD: Displays year and day. The first digit indicates the last digit of the year that the control module was built. The remaining 3 digits indicate the day of the year that the control module was built.

KEY IN IGNITION: Displays Yes or No. The IPM monitors the status of the discrete key-in-ignition switch signal of the ignition switch. When the ignition is OFF, the driver's door is open, and the key is in the ignition, a medium rate multiple pulse chime sounds.

LEFT TURN SIGNAL: Displays Off or On. The status of the discrete left turn signal. The instrument cluster uses this input to determine when to flash the left turn indicator.

LOW COOLANT LEVEL: Displays Off or On. The status of the discrete engine coolant level switch signal. The instrument cluster uses this input to determine display of the CHECK COOLANT LEVEL message on the DIC.
On/Off Switch: Displays Off or On. The status of the discrete ON/OFF switch signal. The instrument cluster uses this input to start and stop the timer and also to change the status the parameters in the feature programming.

ON/OFF SWITCH: Displays Off or On. The status of the discrete ON/OFF switch signal. The instrument cluster uses this input to start and stop the timer and also to change the status the parameters in the feature programming.

PARK BRAKE SWITCH: Displays off or On. The status of the discrete park brake switch signal. The instrument cluster uses this input to determine illumination of the BRAKE indicator.

PROM ID: Displays the PROM ID for the control module.

REFLECTIVE DISPLAY: Displays Off or On. The status of the reflective display on the instrument cluster.

RIGHT TURN SIGNAL: Displays Off or On. The status of the discrete right turn signal. The instrument cluster uses this input to determine when to flash the right turn indicator.

TRIP ODOMETER A/B SWITCH: Displays off or On. The status of the discrete TRIP A/B switch signal. The instrument cluster uses this input to switch the trip odometer currently displayed. The instrument cluster is equipped with 2 trip odometers, TRIP A and TRIP B.

VEHICLE SPEED: Displays 0 to 255 km/h (0 to 159 mph). The current vehicle speed reported to the instrument cluster by the powertrain control module (PCM) via the discrete vehicle speed signal (VSS). The value should match the speedometer display.

VEHICLE SPEED: Displays 0 to 255 km/h (0 to 159 mph). The vehicle speed sensor signal displayed in km/h or mph.

VF DIM: Displays Off or On. The vacuum fluorescent (VF) display dimming level of the instrument cluster.

WASHER FLUID LEVEL: Displays off or On. The status of the discrete washer fluid level switch signal. The instrument cluster uses this input to determine display of the CHECK WASHER FLUID message on the DIC.

YEAR MODULE BUILT: Displays the year that the control module was built.