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 137 (AUTOMATIC HEADLIGHTS)
2004 Toyota Celica GT, Standard
Section 137 (Automatic Headlights)
2004 Toyota Celica GT, StandardSECTION Section 137 (Automatic Headlights)
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Adjustments
- Trouble Shooting
- Self-Diagnostic System
- Diagnostic Tests
- System Tests
- Notes
- Test A: Headlight (Lo Beam, Discharge) Does Not Light Up
- Test B: Taillight Does Not Light Up
- Test C: Initial Set Control Function Does Not Operate (Warning Light Lights Up)
- Test D: Initial Set Control Function Does Not Operate (Warning Light Goes Off)
- Test E: Initial Set Control Function Operates, But Headlight Aiming Does Not Operate (Warning Light Lights Up)
- Test F: Initial Set Control Function Operates, But Headlight Aiming Does Not Operate (Warning Light Goes Off)
- Test G: Light Auto Turn Off System Light Does Not Operate
- Test H: Room Lamp Assembly No. 1 Does Not Light Up
- Test I: Room Lamp Assembly Does Not Go Off
- Test J: Step Lamp Assembly Does Not Light Up
- Component Tests
- Removal & Installation
- Connector Identification
- Wiring Diagrams
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.