For 1990-2009 cars

### 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

This diagnostic procedure applies to serial data engine coolant temperature gage located in the instrument panel cluster (IPC).

### Reference Information

#### Schematic Reference

• | Instrument Cluster Schematics

• | Engine Control Module Connector End Views

#### Connector End View Reference

• | Displays and Gages Connector End Views

• | Engine Control Module Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Scan Tool Data List

### Circuit/System Testing

Ignition ON, with the scan tool, perform the IPC Display Test in the IPC Output Controls. Verify that the engine coolant temperature gage dial moves from minimum to the maximum value and back to the gage minimum value.

⇒ | If the gage does not perform the IPC Display Test, replace the IPC.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for IPC replacement, setup and programming