How To Proceed With Troubleshooting

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

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the defogger system.
- *: Use the 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 LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)*
(a) Use the Techstream to check that the Multiplex Communication System (MPX) is functioning normally.
Result:






B -- Go to MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.

4. 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 Window Defogger System
(d) Inspection Defogger Relay
NEXT -- Continue to next step.

6. REPAIR OR REPLACE
NEXT -- Continue to next step.

7. CONFIRMATION TEST
NEXT -- END