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 125 (MULTIPLEX COMMUNICATION SYSTEM)COMPONENT LOCATIONS
2004 Toyota Celica GT, Standard
Component Locations
2004 Toyota Celica GT, StandardSECTION Component Locations
WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
BODY ELECTRONICS AREA NETWORK (BEAN) COMPONENT LOCATIONS
| Component | Location | ||
|---|---|---|---|
| Body ECU (Driver Side Junction Block) | (1) | ||
| Driver Door ECU (Power Window Regulator Master Switch) | (1) | ||
| Driver Side Junction Block | (1) | ||
| Front Passenger Door ECU (Power Window Regulator Switch) | (1) | ||
| Theft Deterrent ECU (Security ECU) | (1) | ||
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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.