For 1990-2009 cars

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to Power Mode Description and Operation .

### Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could 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

In order to diagnose the symptom, refer to Power Mode Mismatch .