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

The BCM calculates the mileage based on the vehicle speed signal from the engine control module (ECM). The BCM then sends a serial data message to the IPC indicating the value of the odometer. The odometer will display 'error' if an internal BCM memory failure is detected or there is a serial data communication fault. The odometer displays either miles or kilometers and the desired units can be accessed by pressing the trip/reset switch.

### 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, press the trip reset button and verify the odometer display toggles between season odometer and trip odometer.

⇒ | If the odometer display does not toggle between season odometer and 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