Diagnostic Procedures

For testing of the Instrument Cluster System, refer to Body Control Module, 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 can perform a function check for the electronic display, odometer and transmission range indicator, and all warning lamps will illuminate for a brief period of time except:
- Cruise
- Fog lamps
- High beam
- Low fuel
- Low oil pressure
- Turn Signal
- Security alarm
- Brake
- Trac OFF

If the cluster is not receiving CCD bus messages, the cluster will appear nonfunctional except for the continuously illuminated airbag indicator and NO BUS message displayed.

If the cluster is not receiving CCD bus messages, refer to the pre-diagnostic test described in proper Body Diagnostic Procedures or refer to the Instrument Cluster Self-Diagnostic Test.