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 314 (BODY CONTROL SYSTEMS - DIAGNOSTICS)
2004 Toyota Celica GT, Standard
Section 314 (Body Control Systems - Diagnostics)
2004 Toyota Celica GT, StandardSECTION Section 314 (Body Control Systems - Diagnostics)
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- Service Precautions
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Parts Location
- Terminals Of Ecu
- Problem Symptoms Table
- Circuit Inspection
- Power Source Circuit
- Ignition Switch Power Source Circuit
- Light Control Switch Circuit
- Taillight Relay Circuit
- Headlight Relay Circuit
- Key Unlock Warning Switch Circuit
- Horn Circuit
- Theft Deterrent Horn Circuit
- Illumination Circuit
- Indicator Light Circuit
- Door Lock Control Switch Circuit
- Door Key Lock And Unlock Switch Circuit
- Door Unlock Detection Switch
- Door Lock Motor Circuit
- Door Courtesy Switch Circuit
- Driver Buckle Switch Circuit
- Passenger Buckle Switch And Seat Belt Warning Occupant Detection Sensor
- Engine Hood Courtesy Switch Circuit
- Luggage Courtesy Switch Circuit
- Power Window Master Switch Circuit
- Power Window Switch Circuit
- Wireless Door Lock Tuner Circuit
RENDER: 1.0x
NO RELATED
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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.