- Symptoms - List

IMPORTANT: For the Automatic Day-Night Mirror system, review the system operation in order to familiarize yourself with the system functions. Refer to Automatic Day-Night Mirror Description and Operation.

For the Rear Window Defogger system, the following steps must be performed before using the symptom tables.
1. Perform the Diagnostic System Check - Defogger before using the symptom tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. 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 for aftermarket devices which could affect the operation of the Rear Window Defogger and Automatic Day-Night Mirror systems. Refer to Checking Aftermarket Accessories in Diagrams.
^ Inspect the easily accessible or visible system components for obvious damage for conditions which could cause the symptom.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Defogger Inoperative - Rear Window
^ Defogger Grid Lines Diagnosis
^ Mirrors - Automatic Day-Night Inoperative
^ Mirrors - Compass Display Inoperative or Inaccurate