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.
2006 Lexus LX 470FACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
VEHICLE STABILITY CONTROL SYSTEM
VEHICLE STABILITY CONTROL SYSTEM
| Symptom | Suspected area |
|---|---|
| BS does not operate, BA does not operate | Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU |
| 1. Reconfirm the DTC and check that the normal code is output | |
| 2. IG power source circuit | |
| 3. Speed sensor circuit | |
| 4. Check the hydraulic brake booster with a checker or intelligent tester | |
| If abnormal, check the hydraulic circuit for leakage | |
| ABS does not operate efficiently, BA does not operate | Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU |
| 1. Reconfirm the DTC and check that the normal code is output | |
| 2. Speed sensor circuit | |
| 3. Stop light switch circuit | |
| 4. Check the hydraulic brake booster with a checker or intelligent tester | |
| If abnormal, check the hydraulic circuit for leakage | |
| ABS warning light abnormal | 1. ABS warning light circuit |
| 2. Skid control ECU | |
| DTC check cannot be done | Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU |
| 1. ABS warning light circuit | |
| 2. VSC OFF indicator light, center diff. lock indicator switch circuit | |
| 3. Center diff. lock indicator switch circuit | |
| 4. TC and CG terminal circuit | |
| Speed sensor signal check cannot be done | 1. TS and CG terminal circuit |
| 2. Skid control ECU | |
| TRAC does not operate | Only when 1. to 4. are all normal and the problem is still occurring, replace the skid control ECU |
| 1. Check the DTC, reconfirming that the normal code is output | |
| 2. IG power source circuit | |
| 3. Check the hydraulic circuit for leakage | |
| 4. Speed sensor circuit | |
| VSC does not operate | Only when 1. to 7. are all normal and the problem is still occurring, replace the skid control ECU |
| 1. Check the DTC, reconfirming that the normal code is output | |
| 2. IG power source circuit | |
| 3. Check the hydraulic circuit for leakage | |
| 4. Speed sensor circuit | |
| 5. Deceleration sensor circuit | |
| 6. Yaw rate sensor circuit | |
| 7. Steering angle sensor circuit | |
| VSC TRAC warning light abnormal | 1. VSC TRAC warning light circuit |
| 2. Skid control ECU | |
| BRAKE warning light abnormal | 1. BRAKE warning light circuit |
| 2. Skid control ECU | |
| SLIP indicator light abnormal | 1. SLIP indicator light circuit |
| 2. Skid control ECU | |
| VSC OFF indicator abnormal | 1. VSC OFF indicator light, center diff. lock switch circuit |
| 2. Skid control ECU | |
| TRAC indicator light abnormal | 1. TRAC indicator light circuit |
| 2. Skid control ECU |
Factory Service Tools
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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.