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)CIRCUIT INSPECTIONINDICATOR LIGHT 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 Prius. However, it is still accessible from the selected car via links, so may be relevant.
- Check indicator light. (center cluster module control)
- NG: Replace center cluster module control.
- OK: Go to next step.
- Check harness and connector between body ECU and indicator light, indicator light and body ground
. See
HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
.
- NG: Repair or replace harness or connector.
- OK: Go to next step.
Check and replace body ECU. When there is a malfunction that the theft deterrent system cannot be set, proceed to the next numbered circuit inspection shown on problem symptom table. See PROBLEM SYMPTOMS TABLE .
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.