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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 147 (BODY CONTROL SYSTEM)CIRCUIT TESTSKEY UNLOCK WARNING SWITCH CIRCUITDIAGNOSTIC PROCEDURE
2004 Toyota Celica GT, Standard
Diagnostic Procedure
2004 Toyota Celica GT, StandardSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
- Check the key unlock warning switch. See STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT. If the results are OK, go to the next step. If the results are not good, replace the key unlock warning switch.
- Check the wiring harness and connector between the key unlock warning switch and body ECU. If the results are OK, perform the next test procedure of the problem symptom. See step 4 of the SYSTEM OPERATION CHECK under TROUBLE SHOOTING. If the results are not good, repair or replace the wiring harness or connector.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.