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.
How To Proceed With Troubleshooting
HINT:
- Use the following procedure to troubleshoot the defogger system.
- The intelligent tester should be used in step 4.
- VEHICLE BROUGHT TO WORKSHOP
- INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11V, recharge or replace the battery before proceeding to the next step.
- PROBLEM SYMPTOMS TABLE
HINT:
(See PROBLEM SYMPTOMS TABLE )
- OVERALL ANALYSIS AND TROUBLESHOOTING
- (See TERMINALS OF ECU )
- (See DATA LIST / ACTIVE TEST )
- (See ON-VEHICLE INSPECTION )
- REPAIR OR REPLACE
- CONFIRMATION TEST
NEXT: END
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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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