Problem Symptoms Table
NOTE:
When replacing the skid control ECU, sensor, etc., make sure that the engine switch is turned off, the stop light switch is off, and 2 minutes have elapsed since the driver's door was closed.
HINT:
- Use the table below to help determine the cause of the problem symptom. 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.
- Since the oil passage is blocked off by the master cut solenoid during the electronically controlled brake system control, there is no kickback (vibration) to the brake pedal, creating a quiet operating sound even while the ABS is operating.
ELECTRONICALLY CONTROLLED BRAKE SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| ABS, BA and/or EBD does not operate | Use a chassis dynamometer, etc. to check the electronically controlled brake system operation | - |
| Check the DTC again and make sure that the normal system code is output | Refer to DTC CHECK / CLEAR | |
| IG power source circuit | Refer to DTC C1241/41: Low Battery Positive Voltage; DTC C1242/42: Open in IG1 / IG2 Power Source Circuit | |
| Front speed sensor circuit | Refer to DTC C0200/31: Front Speed Sensor RH Circuit; DTC C0205/32: Front Speed Sensor LH Circuit; DTC C1271/71: Low Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1272/72: Low Output Signal of Front Speed Sensor LH (Test Mode DTC) | |
| Rear speed sensor circuit | Refer to DTC C0210/33: Rear Speed Sensor RH Circuit; DTC C0215/34: Rear Speed Sensor LH Circuit; DTC C1273/73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) | |
| Check the brake actuator with the Techstream (Check brake actuator operation using the Active Test function). If abnormal, check the hydraulic circuit for leakage. | Refer to ON-VEHICLE INSPECTION | |
| If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU | Refer to REMOVAL | |
| ABS, BA and/or EBD does not operate efficiently | Check the DTC again and make sure that the normal system code is output | Refer to DTC CHECK / CLEAR |
| Front speed sensor circuit | Refer to DTC C0200/31: Front Speed Sensor RH Circuit; DTC C0205/32: Front Speed Sensor LH Circuit; DTC C1271/71: Low Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1272/72: Low Output Signal of Front Speed Sensor LH (Test Mode DTC) | |
| Rear speed sensor circuit | Refer to DTC C0210/33: Rear Speed Sensor RH Circuit; DTC C0215/34: Rear Speed Sensor LH Circuit; DTC C1273/73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) | |
| Check the brake actuator with the Techstream (Check brake actuator operation using the Active Test function). If abnormal, check the hydraulic circuit for leakage. | Refer to ON-VEHICLE INSPECTION | |
| If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU | Refer to REMOVAL | |
| VSC and/or TR(A)C does not operate | Check that traction control has not operated by carrying out diagnosis (Traction control does not operate while the VSC OFF switch is ON and the brake warning light / yellow (minor malfunction) and slip indicator light are ON) | - |
| Check the DTC again and make sure that the normal system code is output | Refer to DTC CHECK / CLEAR | |
| IG power source circuit | Refer to DTC C1241/41: Low Battery Positive Voltage; DTC C1242/42: Open in IG1 / IG2 Power Source Circuit | |
| Check the hydraulic circuit for leakage | - | |
| Front speed sensor circuit | Refer to DTC C0200/31: Front Speed Sensor RH Circuit; DTC C0205/32: Front Speed Sensor LH Circuit; DTC C1271/71: Low Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1272/72: Low Output Signal of Front Speed Sensor LH (Test Mode DTC) | |
| Rear speed sensor circuit | Refer to DTC C0210/33: Rear Speed Sensor RH Circuit; DTC C0215/34: Rear Speed Sensor LH Circuit; DTC C1273/73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) | |
| Yaw rate and acceleration sensor circuit | Refer to DTC C1234/34: Yaw Rate Sensor Malfunction; DTC C0371/71: Yaw Rate Sensor (Test Mode DTC); DTC C1243/43: Acceleration Sensor Stuck Malfunction; DTC C1244/44: Open or Short in Deceleration Sensor Circuit; DTC C1245/45: Acceleration Sensor Output Malfunction; DTC C1279/79: Deceleration Sensor Output Voltage Malfunction (Test Mode DTC); DTC C1381/97: Acceleration Sensor Power Supply Voltage Malfunction | |
| Steering angle sensor circuit | Refer to DTC C1231/31: Steering Angle Sensor Circuit Malfunction | |
| If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU | Refer to REMOVAL | |
| Sensor signal check cannot be done | TS and CG terminal circuit | Refer to TS and CG Terminal Circuit |
| Skid control ECU | Refer to REMOVAL | |
| DTC check cannot be done | Check the DTC again and make sure that the normal system code is output | Refer to DTC CHECK / CLEAR |
| TC and CG terminal circuit | Refer to TC and CG Terminal Circuit | |
| If the symptoms still occur even after the above circuits in suspected areas have been inspected and proved to be normal, replace the skid control ECU | Refer to REMOVAL | |
| ABS warning light abnormal (Remains on) | ABS warning light circuit | Refer to ABS Warning Light Remains ON |
| 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 |
| Skid control ECU | Refer to REMOVAL | |
| Brake warning light / yellow (minor malfunction) (Multi-information display) abnormal (Remains on) | Brake warning light / yellow (minor malfunction) circuit | Refer to Brake Control Warning Light Remains ON |
| Skid control ECU | Refer to REMOVAL | |
| Brake warning light / yellow (minor malfunction) (Multi-information display) abnormal (Does not come on) | Brake warning light / yellow (minor malfunction) circuit | Refer to Brake Control Warning Light does not Come ON |
| Skid control ECU | Refer to REMOVAL | |
| Brake warning light / red (malfunction) abnormal (Remains on) | Brake fluid level warning light switch circuit | Refer to DTC C1202/68: Master Reservoir Level Malfunction |
| Brake warning light / red (malfunction) circuit | Refer to Brake Warning Light Remains ON | |
| Skid control ECU | Refer to REMOVAL | |
| Brake warning light / red (malfunction) abnormal (Does not come on) | Brake warning light / red (malfunction) circuit | Refer to Brake Warning Light does not Come ON |
| Skid control ECU | Refer to REMOVAL | |
| Slip indicator light abnormal (Remains on / Does not come on) | Slip indicator light circuit | Refer to Slip Indicator Light Circuit |
| 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 |
| 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 |
| Skid control ECU | Refer to REMOVAL | |
| Skid control buzzer abnormal | Skid control buzzer circuit | Refer to Skid Control Buzzer Circuit |
| Skid control ECU | Refer to REMOVAL | |
| Brake hold standby indicator light abnormal | Brake hold operated conditions are not met | Refer to SYSTEM DESCRIPTION |
| Brake hold standby indicator light circuit | Refer to Brake Hold Standby Indicator Light Circuit | |
| Brake hold switch circuit | - | |
| Brake hold operated indicator light abnormal | Brake hold operated conditions are not met | Refer to SYSTEM DESCRIPTION |
| Brake hold operated indicator light circuit | Refer to Brake Hold Operated Indicator Light Circuit |