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 brake actuator assembly, sensors, etc., turn the ignition switch off.
Tech Tips
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.
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 | ||
Front speed sensor circuit | ||
Rear speed sensor circuit | ||
Check the brake actuator assembly using the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the 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 | ||
Rear speed sensor circuit | ||
Stop light switch circuit | ||
Check the brake actuator assembly using the GTS. (Check brake actuator assembly operation using the Active Test function.) If abnormal, check the hydraulic circuit for leaks. | ||
If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the brake actuator assembly. | ||
ABS sensor DTC check cannot be done. | Check for DTCs again and make sure that DTCs are not output. | |
Check CAN communication system. | ||
If the symptoms still occur even after the above suspected areas has been inspected and proved 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 DTCs are not output. | |
Check the engine control system. | ||
Check the automatic transmission control system. | ||
Power source circuit | ||
Check the hydraulic circuit for leaks. | - | |
Front speed sensor circuit | ||
Rear speed sensor circuit | ||
Steering sensor circuit | ||
Replace the ECM. | ||
If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the brake actuator assembly. | ||
VSC sensor DTC check cannot be done. | Check for DTCs again and make sure that DTCs are not output. | |
Check CAN communication system. | ||
If the symptoms still occur even after the above suspected areas has been inspected and proved to be normal, replace the skid control ECU. | ||
TRC OFF indicator light abnormal (Remains on). | TRC OFF indicator light circuit | |
Skid control ECU | ||
TRC OFF indicator light abnormal (Does not come on). | TRC OFF indicator light 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 | ||
TRACK indicator light abnormal (Remains on). | TRACK indicator light circuit | |
Skid control ECU | ||
TRACK indicator light abnormal (Does not come on). | TRACK 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. | Check CAN communication system. | |
Skid control ECU | ||
Hill-start assist does not operate. | Check CAN communication system. | |
Hill start assist indicator circuit |