Use the table below to help determine the cause of a problem. The likely causes of the problem are indicated in descending order. Check each suspected area in order. Repair or replace faulty parts or perform adjustments as necessary.
When replacing any of the brake actuator assembly or sensors, etc., turn the ignition switch off.
Inspect the fuses and relays before investigating the suspected areas shown in the table below.
Inspect each suspected area in order for the corresponding symptom.
| 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 (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 intelligent tester. (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 circuits listed above have been inspected and proved to be normal, replace the brake actuator assembly (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 (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 intelligent tester. (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 circuits listed above have been inspected and proved to be normal, replace the brake actuator assembly (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 symptom still occurs even after the circuits listed above have been inspected and proved to be normal, replace the brake actuator assembly (skid control ECU). | ||
| ABS warning light abnormal (Remains on) | ABS warning light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| ABS warning light abnormal (Does not come on) | ABS warning light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Brake warning light abnormal (Remains on) | Brake warning light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Brake warning light abnormal (Does not come on) | Brake warning light circuit | |
| Brake actuator assembly (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 (Low power supply voltage malfunction) | ||
| IG 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) | ||
| Acceleration sensor circuit (Comparison malfunction) | ||
| Yaw rate 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 (Zero point 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 circuits listed above have been inspected and proved to be normal, replace the brake actuator assembly (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 symptom still occurs even after the circuits listed above have been inspected and proved to be normal, replace the brake actuator assembly (skid control ECU). | ||
| VSC OFF indicator light abnormal (Remains on) | VSC OFF indicator light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| VSC OFF indicator light abnormal (Does not come on) | VSC OFF indicator light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Slip indicator light abnormal (Remains on) | Slip indicator light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Slip indicator light abnormal (Does not come on) | Slip indicator light circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Downhill assist control indicator light abnormal (Remains on) (*1) | Downhill assist control switch circuit | |
| Downhill assist control indicator light circuit | ||
| Brake actuator assembly (Skid control ECU) | ||
| Downhill assist control indicator light abnormal (Does not come on) (*1) | Downhill assist control switch circuit | |
| Downhill assist control indicator light circuit | ||
| Brake actuator assembly (Skid control ECU) | ||
| Sensor check cannot be done | TS and CG terminal circuit | |
| Brake actuator assembly (Skid control ECU) | ||
| Skid control buzzer abnormal | Skid control buzzer circuit | |
| Brake actuator assembly (Skid control ECU) |
(*1): for 4WD