For 1990-2009 cars only
Important Preliminary Checks Before Starting
- Review the Keyless Entry System description and operation in order to familiarize yourself with the system functions. Refer to Keyless Entry System Description and Operation .
- Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information, 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 link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the Keyless Entry system, such as cell phone charges, power inventors, or laptop computers. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | 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 in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
