Problem Symptoms Table
If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the order given in PROBLEM SYMPTOMS TABLE and proceed to the relevant troubleshooting link.
NOTE:
When replacing the skid control ECU, sensor, etc., turn the ignition switch off.
PROBLEM SYMPTOMS TABLE
| Symptoms | Suspected Areas | Proceed To |
|---|---|---|
| ABS does not operate BA does not operate EBD does not operate |
1. Check the DTC again and make sure that the normal code is output 2. IG power source circuit and ground circuit 3. Speed sensor circuit 4. Check the brake actuator with a hand-held tester. If abnormal, check the hydraulic circuit for leakage 5. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| ABS does not operate efficiently BA does not operate efficiently EBD does not operate efficiently |
1. Check the DTC again and make sure that the normal code is output 2. Speed sensor circuit 3. Stop lamp switch circuit 4. Check the brake actuator with a hand-held tester. If abnormal, check the hydraulic circuit for leakage 5. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| ABS warning light (Remains ON) | 1. ABS warning light circuit 2. Skid control ECU |
|
| ABS warning light (Does not light up) | 1. ABS warning light circuit 2. Skid control ECU |
|
| DTC check of ABS cannot be done | 1. Check the DTC again and make sure that the normal code is output 2. TC terminal circuit 3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| Sensor signal check cannot be done | 1. TS terminal circuit 2. Skid control ECU |
|
| VSC and/or TRAC does not operate | 1. Check the DTC again and make sure that the normal code is output 2. IG power source circuit and ground circuit 3. Check the hydraulic circuit for leakage 4. Speed sensor circuit 5. Deceleration sensor circuit 6. Yaw rate sensor circuit 7. Steering sensor circuit 8. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| SLIP indicator light abnormal | 1. SLIP indicator light circuit | |
| TRAC OFF indicator abnormal | 1. Check the DTC again and make sure that the normal code is output 2. TRAC control switch circuit 3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| DTC check of VSC cannot be done | 1. Check the DTC again and make sure that the normal code is output 2. TC terminal circuit 3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
|
| VSC warning light (Remains ON) | 1. Check the DTC again and make sure that the normal code is output 2. VSC warning circuit 3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
DTC CHECK/CLEAR VSC WARNING LIGHT CIRCUIT (REMAINS ON) - |
| VSC warning light (Does not light up) | 1. Check the DTC again and make sure that the normal code is output 2. VSC warning circuit 3. If the symptoms still occur even after the above circuits in suspected areas are inspected and proved to be normal, replace the skid control ECU |
DTC CHECK/CLEAR VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP) - |