For 1990-2009 cars only
Important: The following steps must be completed before using the symptom tables.
- Perform Diagnostic System Check - Vehicle in order to verify that all of the following are true:
- Review the system operation in order to familiarize yourself with the system functions. Refer to Content Theft Deterrent (CTD) Description and Operation .
| • | There are no DTCs set. |
| • | The control module(s) can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the Theft Deterrent System. Refer to Checking Aftermarket Accessories . |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | Ensure that the ignition key is a Pass Key III® key. Pass Key III® keys are identified by 'PK3' stamped into the steel shank of the key. |
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:
