Instrument Cluster / Carrier: Testing and Inspection

In order to diagnose the instrument cluster function, a DRB III scan tool and the proper Body Diagnostic Procedures are required.

As a quick diagnosis, the cluster will perform a functional check of the odometer display, transmission range display and warning indicators after the ignition is switched to run/start. If the cluster is not receiving any bus messages, the cluster will appear non-functional and "no bus" will appear in the odometer display.

A self-test of the cluster can also be initiated by pressing and holding the odometer reset button and switching the ignition from lock to unlock. The cluster will then step through several displays for functional verification.

If the cluster is not functioning properly, refer to the proper Body Diagnostic Procedures.

If the cluster is not receiving PCI bus messages, refer to the pre-diagnostic test described in Body Diagnostic Procedures.

If the diagnostic procedure determines that a replacement of an instrument cluster component is required, refer to the Replacement Procedures.