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.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 264 (BODY CONTROL SYSTEMS - DIAGNOSTICS)CIRCUIT INSPECTIONFOG LIGHT SWITCH CIRCUITINSPECTION PROCEDURE
2004 Toyota Celica GT, Standard
Inspection Procedure
2004 Toyota Celica GT, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- Check fog light switch
. See
INSPECTION
- NG : Replace the fog light switch.
- OK : Go to step 2.
- Check wire harness and connector between fog light switch and Body ECU
. See
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
.
- NG : Repair or replace wire harness or connector.
- OK : Proceed to next circuit inspection shown in problem symptoms. See PROBLEM SYMPTOMS .
RENDER: 1.0x
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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.