For 1990-2009 cars

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

1. Perform the Diagnostic System Check - Vehicle 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 links.

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

• | Electronic Park Lock Description and Operation

• | Power Mode Description and Operation

• | Retained Accessory Power Description and Operation

### Visual/Physical Inspection

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

• | 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

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

• | Ignition Can/Cannot Be Turned Off with Transmission in Any Gear

• | Power Mode Mismatch

• | Retained Accessory Power Malfunction