Instrument Cluster Description & Operation: Odometer

The vehicle odometer is calculated and stored electronically in the body control module (BCM) and is sent via the serial data circuit to the instrument panel cluster (IPC) for display. The BCM calculates and stores the mileage based on the vehicle speed serial data message from the engine control module (ECM). The IPC displays the season odometer information from the BCM in the driver information center (DIC). The odometer displays 'error' if the IPC detects an invalid odometer data from the BCM. After an invalid odometer data is received from the BCM, the IPC will display the last known odometer reading for 1.5 seconds before 'error' is displayed in the DIC.