Instrument Panel Cluster (IPC) Gages Inoperative

INSTRUMENT PANEL CLUSTER (IPC) GAGES INOPERATIVE

DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle Testing and Inspection

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. Install a scan tool.
2. Start the vehicle.
3. With the scan tool, perform the Display(s) Test in the IPC Output Controls.
- If the gage moves from 0 to its maximum value and back to 0 when you perform the displays test, check the for a poor connection at the harness connector of the IPC.
- If the gage does not perform the displays test by moving from 0 to its maximum value and back to 0, replace the IPC
4. If the suspect gage is the speedometer, the gage display must match the ECM/PCM vehicle speed parameter in the ECM/PCM Engine Data List with the vehicle drive wheel raised and transmission in drive or first gear.
- If the gage display does not match the ECM/PCM vehicle speed parameter, replace the IPC

REPAIR INSTRUCTIONS

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

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