Window Defogger System

WINDSHIELD / WINDOWGLASS: WINDOW DEFOGGER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the window defogger system.
- *: Use the intelligent tester or Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Use the intelligent tester or Techstream to check that the CAN communication system is functioning normally.

Result





B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.
4. PROBLEM SYMPTOMS TABLE
(a) Refer to the problem symptoms table Problem Symptoms Table.

Result





B -- Go to step 6
A -- Continue to next step.
5. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Terminals of ECU Window Defogger System

(b) Data List / Active Test Window Defogger System

(c) On-vehicle Inspection Component Tests and General Diagnostics

(d) Inspection
NEXT -- Continue to next step.
6. REPAIR OR REPLACE
NEXT -- Continue to next step.
7. CONFIRMATION TEST
NEXT -- END