The instrument panel cluster (IPC) calculates the mileage based on the vehicle speed information from the engine control module (ECM). The ECM sends the vehicle speed information via the serial data circuit to the body control module (BCM). The BCM then sends the information via the serial data circuit to the IPC. The IPC odometer information is displayed in the driver information center (DIC) and is accessed by pressing the TRIP/FUEL switch until the odometer and trip odometer information is displayed from the menu. The TRIP/FUEL switch is monitored by the IPC via the DIC select menu switch signal circuit and the IPC also provides ground to the switch. The odometer will display 'error' if an internal memory failure is detected. The odometer displays either miles or kilometers and the desired units can be accessed from the vehicle information switch.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Displays and Gages Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

1. Ignition OFF, disconnect the DIC switch connector.
2. Test for less than 1 ohm of resistance between the ground circuit terminal 5 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Trip/Fuel Switch parameter is Inactive.

⇒	If not inactive, test the select menu switch signal circuit for a short to ground. If the circuit tests normal, replace the IPC.

4. Install a 3A fused jumper wire between the select menu switch signal circuit terminal 3 and ground. Verify the scan tool Trip/Fuel Switch parameter is Active.

⇒	If not active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.

5. If all circuits test normal, test or replace the DIC switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the IPC replacement, setup and programming