BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE; 2007 MY LX470 [08/2006

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

Symptom

Suspected area

See page

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