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 165 (ANTI-LOCK BRAKE SYSTEM)SELF-DIAGNOSTIC SYSTEMRETRIEVING CODESWITHOUT HAND-HELD TESTER
2004 Toyota Celica GT, Standard
Without Hand-Held Tester
2004 Toyota Celica GT, StandardSECTION Without Hand-Held Tester
WARNING: This page is about a different car, the 2003 Lexus LS 430, 2002 Lexus LS 430, and 2001 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
- Using special tool (09843-18040), connect terminals Tc and CG of DLC3. See Figure.
- Turn the ignition switch ON. Read the DTC from the ABS warning light blinking patterns on the combination meter. If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed first. For the blinking patterns for normal and codes 11 and 21 see Figure. For diagnostic trouble code definitions see DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- If a code does not appear, inspect the Tc terminal circuit or ABS warning light circuit. See SYSTEM TESTING .
- Read the information from the multi-information display on the combination meter. "VSC OK" is displayed when VSC system is normal. If any DTC is detected, "VSC 31", for example, will be displayed. If there are 2 or more DTC, they will be displayed in ascending order of the number. If no code appears, test the VSC warning indicator circuit and Tc terminal circuit. See SYSTEM TESTING .
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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.