VEHICLE STABILITY CONTROL SYSTEM 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 following table and proceed to the relevant troubleshooting page.
Note
When replacing the skid control ECU, sensors, etc., turn the engine switch off.
Tech Tips
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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| ABS, BA and/or EBD does not operate | Check for DTCs again and make sure that the normal system code is output. | |
| IG power source circuit | ||
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Check the brake actuator assembly using the intelligent tester. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leakage. | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and prove to be normal, replace the skid control ECU. | ||
| ABS, BA and/or EBD does not operate efficiently | Check for DTCs again and make sure that the normal system code is output. | |
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Stop light switch circuit | ||
| Check the brake actuator assembly using the intelligent tester. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leakage. | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and prove to be normal, replace the skid control ECU. | ||
| ABS sensor DTC check cannot be done | Check for DTCs again and make sure that the normal system code is output. | |
| TC and CG terminal circuit | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and prove to be normal, replace the skid control ECU. | ||
| ABS warning light abnormal (Remains on) | ABS warning light circuit | |
| Skid control ECU | ||
| ABS warning light abnormal (Does not come on) | ABS warning light circuit | |
| Skid control ECU | ||
| Brake warning light abnormal (Remains on) | Brake warning light circuit | |
| Skid control ECU | ||
| Brake warning light abnormal (Does not come on) | Brake warning light circuit | |
| Skid control ECU | ||
| VSC and/or TRC does not operate | Check for DTCs again and make sure that the normal system code is output. | |
| IG power source circuit | ||
| Check the hydraulic circuit for leakage. | - | |
| Front speed sensor circuit | ||
| Rear speed sensor circuit | ||
| Yaw rate and acceleration sensor circuit | ||
| Steering angle sensor circuit | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and prove to be normal, replace the skid control ECU. | ||
| VSC sensor DTC check cannot be done | Check for DTCs again and make sure that the normal system code is output. | |
| TC and CG terminal circuit | ||
| If the symptoms still occur even after the above circuits in suspected areas are inspected and prove to be normal, replace the skid control ECU. | ||
| Master caution indicator light and/or multi-information display abnormal (Remains on) | VSC warning light (Master caution indicator light and multi-information display) circuit | |
| Skid control ECU | ||
| Master caution indicator light and/or multi-information display abnormal (Does not come on) | VSC warning light (Master caution indicator light and multi-information display) circuit | |
| Skid control ECU | ||
| VSC OFF indicator light abnormal (Remains on) | VSC OFF indicator light circuit | |
| Skid control ECU | ||
| VSC OFF indicator light abnormal (Does not come on) | VSC OFF indicator light circuit | |
| Skid control ECU | ||
| Slip indicator light abnormal (Remains on) | Slip indicator light circuit | |
| Skid control ECU | ||
| Slip indicator light abnormal (Does not come on) | Slip indicator light circuit | |
| Skid control ECU | ||
| Sensor check cannot be done | TS and CG terminal circuit | |
| Skid control ECU | ||
| Skid control buzzer abnormal | Skid control buzzer circuit | |
| Skid control ECU |