Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Problem Symptoms Table
| Symptom | Suspected Area | See |
|---|---|---|
| Rear window defogger does not operate (Indicator ON) |
|
LOCATION LOCATION LOCATION INSPECTION - |
| Rear window defogger does not operate (Indicator OFF) |
|
LOCATION LOCATION LOCATION TERMINALS OF ECU TERMINALS OF ECU INSPECTION - |
| Mirror heater does not operate (Indicator ON) |
|
LOCATION LOCATION LOCATION INSPECTION - |
| Mirror heater does not operate (Indicator OFF) |
|
LOCATION LOCATION LOCATION TERMINALS OF ECU TERMINALS OF ECU INSPECTION - |
HINT:
The wind defogger system is part of the large-scale multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (see the multiplex communication system).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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