Important: For the rear window defogger system, the
following steps must be performed before using the symptom tables.
- 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:
• | The control modules can communicate via the serial data link. |
- Review the rear window defogger system operation in order to familiarize
yourself with the system functions. Refer to
Rear Window Defogger 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: