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 143 (ANTI-LOCK)COMPONENT TESTSSPEED SENSOR SIGNAL CHECKWITH HAND-HELD TESTER
2004 Toyota Celica GT, Standard
With Hand-Held Tester
2004 Toyota Celica GT, StandardSECTION With Hand-Held Tester
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.
- Connect hand-held tester to (DLC3). See Figure.
- Start engine and check that ABS warning light flashes. If ABS warning light does not flash, inspect ABS warning light circuit and Ts circuit. See SYSTEM TESTING .
- Keep vehicle in stationary condition on a flat surface for one second or more.
- Depress brake pedal with 33 ft.lb. (147 N) or more for one second or more.
- Let up pressure and then depress brake pedal quickly with 22 ft.lb. (98 N) or more. ABS warning light comes on for 3 seconds.
- Drive vehicle straight forward and faster than 28 MPH for several seconds. Check that ABS warning light turns off.
- Stop vehicle. Read DTCs by following prompts on tester screen. If any DTCs are retrieved, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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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.