GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster Scan Tool Data Parameters
Table 2: Instrument Panel Cluster Scan Tool Output Controls

Instrument Panel Cluster Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

ABS Lamp

--

Off

The scan tool displays On or Off. The state of the antilock brake system (ABS) indicator as commanded by the instrument panel cluster (IPC).

Air Bag Lamp

--

Off

The scan tool displays On or Off. The state of the air bag indicator as commanded by the instrument panel cluster (IPC).

Battery

--

On

The scan tool displays 0-19 volts. The voltage at the battery positive voltage circuit of the IPC.

Battery Voltage

--

Varies

This displays volts. This is the voltage input supplied to the instrument panel cluster.

Brake Lamp

--

Off

The scan tool displays On or Off. The state of the brake system indicator as commanded by the IPC.

Check Gauges Lamp

--

Off

The scan tool displays On or Off. The state of the CHECK GAGES indicator as commanded by the IPC.

Cruise Control

--

Off

The scan tool displays On or Off. The state of the cruise indicator as commanded by the IPC.

DIC Fuel Info.

--

Off

The scan tool displays Off or On. This is the state of the DIC Fuel Info. switch.

DIC Personalization

--

Off

The scan tool displays Active or Inactive. This is the state of the DIC Personalization switch.

DIC Select

--

Off

The scan tool displays On or Off. The IPC monitors the Select button of the DIC switch. A closed switch is displayed as On.

DIC Trip Info

--

Off

The scan tool displays On or Off. The IPC monitors the Trip button of the DIC switch. A closed switch is displayed as On.

Displayed Coolant Temp.

--

Varies

The scan tool displays 38-128°C (100-260°F). The displayed coolant temperature gage value in the IPC. This value may slightly differ from the monitored coolant temperature.

Displayed Fuel Level

--

Varies

The scan tool displays 0-100%. The displayed fuel gage value in the IPC. This value may slightly differ from the monitored fuel level.

Displayed Odometer

--

Varies

The scan tool displays 0-999999 km (miles). The displayed odometer value in the IPC.

Displayed Oil Pressure

--

0 kPA (0 PSI)

The scan tool displays 0-682 kPa (0-99 psi). The displayed oil pressure gage value in the IPC.

Engine Speed

--

0 RPM

The scan tool displays 0-9999 RPM. The IPC monitors the engine speed signal circuit from the PCM.

Fasten Seat Belts

--

Off

The scan tool displays On or Off. The state of the fasten safety belt indicator as commanded by the IPC.

High Beam Lamp

--

Off

The scan tool displays On or Off. The state of the high beam indicator as commanded by the IPC.

Ignition 1

--

12.2 V (Varies)

The scan tool displays 0-19 volts. The voltage measured at the ignition 1 voltage circuit of the IPC.

Ign. Since Current DTC

--

Varies

The scan tool displays 0-50. The IPC counts the number of times the ignition is cycled since the current DTC was set.

Left Turn Input

--

Open

The scan tool displays Open or Closed. The IPC monitors the left turn signal supply voltage circuit. An active turn signal toggles between Open and Closed.

Low Fuel Lamp

--

Off

The scan tool displays On or Off. The state of the low fuel indicator as commanded by the IPC.

Low Washer Fluid

--

OK

The scan tool displays OK or Low. This is the state of the washer fluid level.

Monitored Coolant Temp.

--

Varies

The scan tool displays 40-419°F (40-215°C). The IPC monitored coolant temperature data as provided by the PCM via the class 2 serial data link.

Monitored Fuel Level

--

Varies

The scan tool displays 0-100%. The IPC monitored fuel level percent as provided by the PCM via the class 2 serial data link.

Monitored Oil Pressure

--

0 kPA (0 PSI)

The scan tool displays 0-682 kPa (0-99 psi). The IPC monitored oil pressure as provided by the PCM via the class 2 serial data link.

PRNDL State

--

Park

The scan tool displays Park, Reverse, Neutral, Drive, and Low. The state of the PRNDL as commanded by the IPC.

Rear Gate/Door

--

Closed

The scan tool displays Open or Closed. The state of the liftgate switch as monitored by the IPC.

Right Turn Input

--

Open

The scan tool displays Open or Closed. The IPC monitors the right turn signal lamps supply voltage circuit. An active turn signal toggles between Open and Closed.

Security Lamp

--

Off

The scan tool displays On or Off. The state of the SECURITY indicator as commanded by the IPC.

Service 4WD

--

Off

The scan tool displays On or Off. The state of the Service 4WD indicator as commanded by the IPC.

Trip Odometer A

--

Varies

The scan tool displays miles. The IPC calculates trip odometer information from the vehicle speed data received from the PCM.

Trip Odometer B

--

Varies

The scan tool displays miles. The IPC calculates trip odometer information from the vehicle speed data received from the PCM.

Trip Reset Switch

--

Inactive

The scan tool displays Active or Inactive. The IPC monitors the TRIP RESET button of the DIC switch. A closed switch is displayed as Active.

Upshift Lamp

--

Off

The scan tool displays On or Off. This is the state of the upshift lamp as commanded by the IPC.

Vehicle Speed

--

0 mph (0 km/h)

The scan tool displays 0-255 km/h (0-155 mph). The IPC monitors the vehicle speed signal circuit from the PCM.


Instrument Panel Cluster Scan Tool Output Controls

Output Control

Description

IPC Gages

The IPC drives all gages to the maximum physical position when you select On. The IPC drives all gages to the minimum physical position when you select Off.

Lamp Test

The IPC illuminates the following indicators when you select On:

    • ABS
    • Air Bag
    • Battery
    • BRAKE
    • CHANGE ENG OIL
    • CHECK GAGES
    • CRUISE
    • Fasten safety belt
    • GATE AJAR
    • High beam
    • LOW FUEL
    • REDUCED ENGINE POWER
    • SECURITY
    • SERVICE 4WD
    • SERVICE ENGINE SOON

The indicators should illuminate until commanded Off.

PRNDL Display

An underscore illuminates under each indicator in the PRNDL display until commanded Off.

Segments Test

All DIC and Odometer segments illuminate until commanded Off.