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.
2004 Lexus SC 430FACTORY OEM SERVICE PROCEDURE
With Hand-Held Tester
- Hook up the hand-held tester to the DLC3.
- Turn the ignition switch ON and check that the ABS warning light blinks. If the warning light does not blink, inspect the ABS warning light circuit or Ts terminal circuit. See TEST D: ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) and TEST I: TS TERMINAL CIRCUIT .
- Ensure the vehicle is in a stationary condition. Leave the brake pedal in free condition for 1 second or more then quickly depress the brake pedal hard for 1 second or more. At this time the ABS warning light goes on for 3 seconds. This step will check the master cylinder pressure sensor.
- Drive the vehicle straight forward with the speed faster than 28 mph (48 km/h) for several seconds and check that the ABS warning light turns off. The sensor check may not be completed if the wheels spin or the steering wheel is turned during this check. This will check the speed sensor signal.
- Stop the vehicle.
- Read the DTC by following the prompts on the tester screen. Refer to the LEXUS hand-held tester operator's manual for further details.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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