Instrument Cluster / Carrier: Testing and Inspection

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 PCI 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. By pressing the trip odometer reset button while going through the self-test, you can temporarily freeze the test. Pressing the bottom again will continue sequence. The cluster will store bus communication faults with other modules. It will also store faults for the AIRBAG and ABS lamps. During the self-diagnostics, the AIRBAG and ABS lamps are tested.

The cluster is capable of turning ON/OFF the PCI bus controlled lamps through the PID (parameter ID).

It is capable of controlling gauges and turning ON the VFD to various brightness levels.

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.

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

If the diagnostic procedure determines that a replacement of an instrument cluster component is required, refer to Electrical, Instrument Cluster, Removal, and Installation.