Instrument Cluster Gages Inoperative

Instrument Cluster Gages Inoperative

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle Initial Inspection and Diagnostic Overview

Circuit/System Description

This diagnostic procedure applies to serial data gages located in the instrument panel cluster (IPC) which include the speedometer, tachometer, engine coolant temperature gage and volt gage if equipped.

Circuit/System Testing

Important: If the suspect gage is the speedometer, the drive wheels of the vehicle must be raised and the transmission must be placed in drive or first gear.

1. Ignition ON, with the scan tool, perform the IPC Gage Sweep Test in the IPC Output Controls. Verify that all gage dials move from minimum to the maximum position and back to the gage minimum position.

• If the gage does not perform the IPC Gage Sweep Test, replace the IPC.

2. Start the engine, with the vehicle drive wheels raised and place the transmission in drive or first gear. Verify that the speedometer value matches the scan tool Vehicle Speed parameter in the ECM/PCM Engine Data List.

• If the speedometer is incorrect, test or replace the IPC.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Refer to Programming and Relearning for the IPC replacement, setup and programming. Programming and Relearning