For 1990-2009 cars

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the radio. Refer to Checking Aftermarket Accessories .

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

• | Inspect for mechanical binding.

### Intermittents

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

### Symptoms

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

Power Sunroof Inoperative