Important: For the Outside Automatic Day-Night Mirror system, review the system
operation in order to familiarize yourself with the system functions. Refer
to 
Outside Mirror Description and Operation 
.
For the other Door systems, the following steps must be performed before
using the symptom tables.
- Perform the 
Diagnostic System Check - Door Systems 
 before using the symptom tables in order to verify
that all of the following are true:
 
| •  | The control module can communicate via the serial data link. | 
 
- Review the system operation in order to familiarize yourself with
the system functions:
 
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: