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 132 (POWER SEATS)SELF-DIAGNOSTIC SYSTEMRETRIEVING DIAGNOSTIC TROUBLE CODESUSING A/C CONTROL PANEL SWITCHES
2004 Toyota Celica GT, Standard
Using A/C Control Panel Switches
2004 Toyota Celica GT, StandardSECTION Using A/C Control Panel Switches
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.
- While pressing and holding AUTO and fresh/recirculated air switches simultaneously, turn ignition on. See Figure. Indicators will flash on and off at one second intervals 4 times in succession. After indicator check is complete, system will automatically enter self-diagnostic mode. Press OFF button to cancel indicator check.
- Stored trouble DTCs will appear in sequence on temperature display panel. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table. Press front defrost switch to display DTCs one at a time. Press OFF button to exit self-diagnostics. To clear DTC(s), see CLEARING DIAGNOSTIC TROUBLE CODES .
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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.