Problem Symptoms Table
HINT:
- 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 or sensor, turn the ignition switch off.
VEHICLE STABILITY CONTROL SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| ABS, BA and/or EBD does not operate | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| IG power source circuit | Refer to DTC C1241: Low Power Supply Voltage Malfunction | |
| Front speed sensor circuit | Refer to DTC C1405: Open or Short in Front Speed Sensor RH Circuit; DTC C1406: Open or Short in Front Speed Sensor LH Circuit | |
| Rear speed sensor circuit | Refer to DTC C1407: Open or Short in Rear Speed Sensor RH Circuit; DTC C1408: Open or Short in Rear Speed Sensor LH Circuit | |
| Check brake actuator using Techstream (Check brake actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage. | Refer to ON-VEHICLE INSPECTION | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| ABS, BA and/or EBD does not operate efficiently | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| Front speed sensor circuit | Refer to DTC C1405: Open or Short in Front Speed Sensor RH Circuit; DTC C1406: Open or Short in Front Speed Sensor LH Circuit | |
| Rear speed sensor circuit | Refer to DTC C1407: Open or Short in Rear Speed Sensor RH Circuit; DTC C1408: Open or Short in Rear Speed Sensor LH Circuit | |
| Stop light switch circuit | Refer to Stop Light Switch Circuit | |
| Check brake actuator using Techstream (Check brake actuator operation using Active Test function). If abnormal, check hydraulic circuit for leakage. | Refer to ON-VEHICLE INSPECTION | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| VSC and/or TRAC does not operate | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| IG power source circuit | Refer to DTC C1241: Low Power Supply Voltage Malfunction | |
| Check hydraulic circuit for leakage | - | |
| Front speed sensor circuit | Refer to DTC C1405: Open or Short in Front Speed Sensor RH Circuit; DTC C1406: Open or Short in Front Speed Sensor LH Circuit | |
| Rear speed sensor circuit | Refer to DTC C1407: Open or Short in Rear Speed Sensor RH Circuit; DTC C1408: Open or Short in Rear Speed Sensor LH Circuit | |
| Yaw rate sensor circuit | Refer to DTC C1232: Acceleration Sensor Stuck Malfunction; DTC C1243: Acceleration Sensor Stuck Malfunction; DTC C1245: Acceleration Sensor Output Malfunction | |
| Steering angle sensor circuit | Refer to DTC C1432: Steering Angle Sensor Power Source Voltage Malfunction | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| Sensor signal check cannot be performed | TS and CG terminal circuit | Refer to TS and CG Terminal Circuit |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| DTC check cannot be performed | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| TC and CG terminal circuit | Refer to TC and CG Terminal Circuit | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| ABS warning light abnormal (Remains on) | ABS warning light circuit | Refer to ABS Warning Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| ABS warning light abnormal (Does not come on) | ABS warning light circuit | Refer to ABS Warning Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| VSC OFF indicator light abnormal (Remains on) | VSC OFF indicator light circuit | Refer to VSC OFF Indicator Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| VSC OFF indicator light abnormal (Does not come on) | VSC OFF indicator light circuit | Refer to VSC OFF Indicator Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| BRAKE warning light abnormal (Remains on) | BRAKE warning light circuit | Refer to Brake Warning Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| BRAKE warning light abnormal (Does not come on) | BRAKE warning light circuit | Refer to Brake Warning Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Slip indicator light abnormal (Remains on) | Slip indicator light circuit | Refer to Slip Indicator Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Slip indicator light abnormal (Does not come on) | Slip indicator light circuit | Refer to Slip Indicator Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| TRAC OFF indicator light (Remains on) | TRAC OFF indicator light circuit | Refer to TRAC OFF Indicator Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| TRAC OFF indicator light (Does not come on) | TRAC OFF indicator light circuit | Refer to TRAC OFF Indicator Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Skid control buzzer abnormal | Skid control buzzer circuit | Refer to Skid Control Buzzer Circuit |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Downhill assist control does not operate*1 | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| Downhill assist control indicator light circuit | Refer to Downhill Assist Control Indicator Light does not Come ON | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| Downhill assist control indicator light abnormal (Remains on)*1 | Downhill assist control indicator light circuit | Refer to Downhill Assist Control Indicator Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Downhill assist control indicator light abnormal (Does not come on)*1 | Downhill assist control indicator light circuit | Refer to Downhill Assist Control Indicator Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| Hill-start assist control does not operate*2 | Brake actuator (skid control ECU) | Refer to REMOVAL |
| AUTO LSD does not operate*3 | Check for DTCs again and make sure that normal system code displayed. | Refer to DTC CHECK / CLEAR |
| VSC OFF switch circuit | Refer to AUTO LSD Indicator Light does not Come ON | |
| AUTO LSD indicator light circuit | Refer to AUTO LSD Indicator Light does not Come ON | |
| If symptoms still occur even after above circuits in suspected areas inspected and proved to be normal, replace brake actuator (skid control ECU). | Refer to REMOVAL | |
| AUTO LSD indicator light abnormal (Remains on)*3 | AUTO LSD indicator circuit | Refer to AUTO LSD Indicator Light Remains ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL | |
| AUTO LSD indicator light abnormal (Does not come on)*3 | AUTO LSD indicator circuit | Refer to AUTO LSD Indicator Light does not Come ON |
| Brake actuator (skid control ECU) | Refer to REMOVAL |
HINT:
*1: w/ Downhill Assist Control
*2: w/ Hill-start Assist Control
*3: for 2WD