Reading and Clearing Diagnostic Trouble Codes

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 duster 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.

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

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

In order to diagnose the instrument duster functions, a DRBIII(R) scan tool and the proper Body Diagnostic Procedures Manual 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.