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.
Note
When replacing the brake actuator assembly, a sensor, etc., turn the ignition switch off.
| 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 (low power supply voltage malfunction) | ||
| IG power source circuit (high power supply voltage malfunction) | ||
| Front speed sensor circuit (open or short malfunction) | ||
| Front speed sensor circuit (output malfunction) | ||
| Rear speed sensor circuit (open or short malfunction) | ||
| Rear speed sensor circuit (output malfunction) | ||
| for LHD: 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 leaks. | ||
| for RHD: 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 leaks. | ||
| for LHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| for RHD: If the symptoms still occur even after the above items in the suspected area column 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 the normal system code is output | |
| Front speed sensor circuit (open or short malfunction) | ||
| Front speed sensor circuit (output malfunction) | ||
| Rear speed sensor circuit (open or short malfunction) | ||
| Rear speed sensor circuit (output malfunction) | ||
| Stop light switch circuit | ||
| for LHD: 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 leaks. | ||
| for RHD: 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 leaks. | ||
| for LHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| for RHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| ABS sensor DTC check cannot be performed | Check for DTCs again and make sure that the normal system code is output | |
| TC and CG terminal circuit | ||
| for LHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| for RHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| ABS warning light abnormal (Remains on) | Refer to ABS Warning Light Remains ON | |
| ABS warning light abnormal (Does not come on) | Refer to ABS Warning Light does not Come ON | |
| Brake warning light abnormal (Remains on) | Refer to Brake Warning Light Remains ON | |
| Brake warning light abnormal (Does not come on) | Refer to Brake Warning Light does not Come ON | |
| 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 (low power supply voltage malfunction) | ||
| IG power source circuit (high power supply voltage malfunction) | ||
| Check the hydraulic circuit for leaks | - | |
| Front speed sensor circuit (open or short malfunction) | ||
| Front speed sensor circuit (output malfunction) | ||
| Rear speed sensor circuit (open or short malfunction) | ||
| Rear speed sensor circuit (output malfunction) | ||
| Yaw rate and acceleration sensor circuit (zero point malfunction) | ||
| Yaw rate and acceleration sensor circuit (power supply malfunction) | ||
| Yaw rate sensor circuit (comparison malfunction) | ||
| Steering angle sensor circuit (zero point malfunction) | ||
| Steering angle sensor circuit (output malfunction) | ||
| for LHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| for RHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| VSC sensor DTC check cannot be performed | Check for DTCs again and make sure that the normal system code is output | |
| TC and CG terminal circuit | ||
| for LHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| for RHD: If the symptoms still occur even after the above items in the suspected area column have been inspected and proved to be normal, replace the skid control ECU (brake actuator assembly) | ||
| TRC OFF indicator light abnormal (Remains on) | Refer to TRC OFF Indicator Light Remains ON | |
| TRC OFF indicator light abnormal (Does not come on) | Refer to TRC OFF Indicator Light does not Come ON | |
| VSC OFF indicator light abnormal (Remains on) | Refer to VSC OFF Indicator Light Remains ON | |
| VSC OFF indicator light abnormal (Does not come on) | Refer to VSC OFF Indicator Light does not Come ON | |
| Slip indicator light abnormal (Remains on) | Refer to Slip Indicator Light Remains ON | |
| Slip indicator light abnormal (Does not come on) | Refer to Slip Indicator Light does not Come ON | |
| Test Mode (signal check) cannot be performed | TS and CG terminal circuit | |
| for LHD: Skid control ECU (Brake actuator assembly) | ||
| for RHD: Skid control ECU (Brake actuator assembly) |