Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
VEHICLE STABILITY CONTROL SYSTEM (w/ VDIM) - PROBLEM SYMPTOMS TABLE
If there are no DTCs output and the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
- HINT:
Inspect the fuse and relay before investigating the suspected areas as shown in the table below.
Inspect each malfunction circuit in numerical order for the corresponding symptom.
| Symptom | Suspected Area | See page |
| ABS, BA and/or EBD does not operate | 1. Check the DTC again and make sure that the normal system code is output. | |
| 2. IG power source circuit | ||
| 3. Front speed sensor circuit | ||
| 4. Rear speed sensor circuit | ||
| 5. Check the brake actuator assembly with the intelligent tester. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leakage. | ||
| 6. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU. | ||
| ABS, BA and/or EBD does not operate efficiently | 1. Check the DTC again and make sure that the normal system code is output. | |
| 2. Front speed sensor circuit | ||
| 3. Rear speed sensor circuit | ||
| 4. Stop light switch circuit | ||
| 5. Check the brake actuator assembly with the intelligent tester. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leakage. | ||
| 6. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU. | ||
| ABS sensor DTC check cannot be done | 1. Check the DTC again and make sure that the normal system code is output. | |
| 2. TC and CG terminal circuit | ||
| 3. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU. | ||
| ABS warning light abnormal (Remains on) | 1. ABS warning light circuit | |
| 2. Skid control ECU | ||
| ABS warning light abnormal (Does not come on) | 1. ABS warning light circuit | |
| 2. Skid control ECU | ||
| BRAKE warning light abnormal (Remains on) | 1. BRAKE warning light circuit | |
| 2. Skid control ECU | ||
| BRAKE warning light abnormal (Does not come on) | 1. BRAKE warning light circuit | |
| 2. Skid control ECU | ||
| VSC and/or TRC does not operate | 1. Check the DTC again and make sure that the normal system code is output. | |
| 2. IG power source circuit | ||
| 3. Check the hydraulic circuit for leakage | - | |
| 4. Front speed sensor circuit | ||
| 5. Rear speed sensor circuit | ||
| 6. Yaw rate and acceleration sensor circuit | ||
| 7. Steering angle sensor circuit | ||
| 8. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU. | ||
| VSC sensor DTC check cannot be done | 1. Check the DTC again and make sure that the normal system code is output. | |
| 2. TC and CG terminal circuit | ||
| 3. If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU. | ||
| VSC warning (multi information display and master caution indicator light) light abnormal (Remains on) | 1. VSC warning light circuit | |
| 2. Skid control ECU | ||
| VSC warning (multi information display and master caution indicator light) light abnormal (Does not come on) | 1. VSC warning light circuit | |
| 2. Skid control ECU | ||
| SLIP indicator light abnormal (Remains on) | 1. SLIP indicator light circuit | |
| 2. Skid control ECU | ||
| SLIP indicator light abnormal (Does not come on) | 1. SLIP indicator light circuit | |
| 2. Skid control ECU | ||
| Sensor check cannot be done | 1. TS and CG terminal circuit | |
| 2. Skid control ECU | ||
| Skid control buzzer abnormal | 1. Skid control buzzer circuit | |
| 2. Skid control ECU |
LEXUS IS250, IS220d / GSE20 ALE20