GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    •  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The instrument panel cluster (IPC) calculates the vehicle mileage based on the vehicle driven distance information from the engine control module (ECM). The ECM sends the vehicle driven distance information to the steering column control module (SCCM) via the serial data circuit. The SCCM sends a serial data message to the IPC indicating the vehicle driven distance. The IPC uses the vehicle driven distance data to calculate and display the vehicle odometer and trip odometer. The IPC detects the activation of the trip reset switch and a press and hold of the trip reset switch resets the trip odometer information to zero.

Reference Information

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Instrument Cluster Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, verify the odometer trip reset switch resets the trip odometer display when the switch is pressed.

If the odometer trip reset switch does not reset the trip odometer, replace the IPC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the IPC replacement, setup and programming.