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
System Testing: Notes
SYSTEM INDEX
| Symptom | Perform Test |
|---|---|
| ABS Sensor Signal Check | TEST A |
| DTC Always On, Malfunction In ABS ECU | TEST B |
| DTC Always On, Malfunction in ECU (VSC Warning Light) | TEST C |
| ABS Warning Light Circuit (Does Not Light Up) | TEST D |
| BRAKE Warning Light Circuit | TEST E |
| SLIP Indicator Light Circuit | TEST F |
| Skid Control Buzzer Circuit | TEST G |
| TC Terminal Circuit | TEST H |
| TS Terminal Circuit | TEST I |
| VSC OFF Indicator Light, VSC OFF Switch Circuit | TEST J |
| VSC Sensor Signal Check | TEST K |
| VSC Warning Light Circuit (Does Not Light Up) | TEST L |
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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