VEHICLE STABILITY CONTROL SYSTEM PROBLEM SYMPTOMS TABLE
If there are no DTCs output and the problem still occurs, check the suspected areas 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 (brake actuator assembly), 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 DTCs are not output. | |
| Power source circuit (Low power supply voltage malfunction) | ||
| Power source circuit (High power supply voltage malfunction) | ||
| Front speed sensor circuit (Output malfunction) | ||
| Rear speed sensor circuit (Output malfunction) | ||
| Front speed sensor circuit (Open or short malfunction) | ||
| Rear speed sensor circuit (Open or short malfunction) | ||
| Front speed sensor circuit (Comparison malfunction) | ||
| Rear speed sensor circuit (Comparison malfunction) | ||
| Check the brake actuator assembly with the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
| If the symptom still occurs even after the suspected areas listed above have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly). | ||
| ABS, BA and/or EBD does not operate efficiently. | Check for DTCs again and make sure that DTCs are not output. | |
| Front speed sensor circuit (Output malfunction) | ||
| Rear speed sensor circuit (Output malfunction) | ||
| Front speed sensor circuit (Open or short malfunction) | ||
| Rear speed sensor circuit (Open or short malfunction) | ||
| Front speed sensor circuit (Comparison malfunction) | ||
| Rear speed sensor circuit (Comparison malfunction) | ||
| Stop light switch circuit (Open or short malfunction) | ||
| Stop light switch circuit (Off stuck malfunction) | ||
| Check the brake actuator assembly with the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
| If the symptom still occurs even after the suspected areas listed above have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly). | ||
| ABS sensor DTC check cannot be done. | Check for DTCs again and make sure that DTCs are not output. | |
| TC and CG terminal circuit | ||
| If the symptom still occurs even after the suspected areas listed above have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly). | ||
| ABS warning light abnormal (Remains on). | ABS warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| ABS warning light abnormal (Does not come on). | ABS warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Brake warning light abnormal (Remains on). | Brake warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Brake warning light abnormal (Does not come on). | Brake warning light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| VSC and/or TRC does not operate. | Check for DTCs again and make sure that DTCs are not output. | |
| Power source circuit (Low power supply voltage malfunction) | ||
| Power source circuit (High power supply voltage malfunction) | ||
| Check the hydraulic circuit for leaks. | - | |
| Front speed sensor circuit (Output malfunction) | ||
| Rear speed sensor circuit (Output malfunction) | ||
| Front speed sensor circuit (Open or short malfunction) | ||
| Rear speed sensor circuit (Open or short malfunction) | ||
| Front speed sensor circuit (Comparison malfunction) | ||
| Rear speed sensor circuit (Comparison malfunction) | ||
| Yaw rate and acceleration sensor circuit (Zero point malfunction) | ||
| Yaw rate and acceleration sensor circuit (Power supply malfunction) | ||
| Yaw rate and acceleration sensor circuit (Comparison malfunction) | ||
| Yaw rate and acceleration sensor circuit (Stuck or output malfunction) | ||
| Yaw rate and acceleration sensor circuit (Internal malfunction) | ||
| Steering angle sensor circuit (Power supply malfunction) | ||
| Steering angle sensor circuit (Output malfunction) | ||
| Steering angle sensor circuit (Internal malfunction) | ||
| If the symptom still occurs even after the suspected areas listed above have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly). | ||
| VSC sensor DTC check cannot be done. | Check for DTCs again and make sure that DTCs are not output. | |
| TC and CG terminal circuit | ||
| If the symptom still occurs even after the suspected areas listed above have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly). | ||
| VSC OFF indicator light abnormal (Remains on). | VSC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| VSC OFF indicator light abnormal (Does not come on). | VSC OFF indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Slip indicator light abnormal (Remains on). | Slip indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Slip indicator light abnormal (Does not come on). | Slip indicator light circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Multi-information display (TRC OFF indicator light) abnormal (Remains on). | Multi-information display (TRC OFF indicator light) circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Multi-information display (TRC OFF indicator light) abnormal (Does not come on). | Multi-information display (TRC OFF indicator light) circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Sensor check cannot be done. | TS and CG terminal circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Meter buzzer abnormal | Meter buzzer circuit | |
| Skid control ECU (Brake actuator assembly) | ||
| Skid control buzzer assembly abnormal* | Skid control buzzer circuit | |
| Skid control ECU (Brake actuator assembly) |
*: w/ Dynamic Radar Cruise Control