Important: The following steps must be completed before using the symptom tables.
- Perform Diagnostic System Check - Remote Keyless Entry before using the
 Symptom Tables in order to verify that all of the following are true:
 
| •  | The control module(s) can communicate via the serial data link. | 
 
- Review the system operation in order to familiarize yourself with the
 system functions. Refer to 
Keyless Entry System Description and Operation 
.
 
Visual/Physical Inspection
|     •  | 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: