Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The instrument panel cluster (IPC) displays the engine speed based on the information from the engine control module (ECM) or the powertrain control module (PCM). The ECM/PCM converts the data from the engine speed sensor to a 2 pulses/engine revolution signal. The IPC receives a serial data message from the ECM/PCM indicating the engine speed.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Instrument Panel, Gages, and Console Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

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 value and back to the gage minimum value.

⇒	If the tachometer does not perform the IPC Gage Sweep Test, replace the IPC.

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

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