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

1. Before using the symptom diagnostic tables, perform the Diagnostic System Check - Vehicle in Vehicle DTC Information in order to verify the following conditions:

•	There are not any DTCs set.

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

2. Review the system operation in order to understand the system functions. Refer to the following description and operations:

•	Instrument Cluster Description and Operation

•	Indicator/Warning Message 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

Audible Warnings