Important: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Instrument Cluster , Diagnostic System Check - Driver Information Systems or to Diagnostic System Check - Audible Warnings before using the Symptom Tables in order to verify that all of the following are true:

•	There are no DTCs set.

•	The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

•	Instrument Cluster Description and Operation

•	Indicator/Warning Message Description and Operation

•	Driver Information Center (DIC) Description and Operation

•	Audible Warnings Description and Operation

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Gages and Odometer

Indicators

Driver Information Center (DIC)

IPC Dimming

Audible Warnings