For 1990-2009 cars

Important:

• | Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following conditions are true:

- | There are no DTCs set.

- | The control modules can communicate via the serial data link.

• | Review the system operation in order to familiarize yourself with the system functions. Refer to Steering Wheel Controls Description and Operation .

### Visual/Physical Inspection

• | Inspect for aftermarket devices which may affect the operation of the Steering Wheel Controls System. Refer to Checking Aftermarket Accessories .

• | Inspect for easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

### Intermittent

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

### Symptom List

Refer to Steering Wheel Controls Inoperative in order to diagnose the symptom.