Instrument Cluster Description and Operation: Odometer

The engine control module (ECM) sends the vehicle speed information to the instrument panel cluster (IPC) via the serial data circuit. The algorithm for calculating the odometer/trip odometer and the memory for storing the odometer information is in the IPC. The odometer displays 'error' in the DIC if an internal IPC memory failure is detected, an algorithm fault is detected by the IPC or the IPC receives an invalid vehicle speed information from the ECM. Refer Control Module References for the IPC replacement, setup and programming.