VEHICLE STABILITY CONTROL SYSTEM PROBLEM SYMPTOMS TABLE

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 skid control ECU (brake actuator assembly), sensors, etc., turn the ignition switch off.

Tip:
  • 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.

Table 1. Vehicle Stability Control System

Symptom

Suspected Area

Link

ABS, BA and/or EBD does not operate

Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)

Click here

Power source circuit (low power supply voltage malfunction)

Click here

Power source circuit (high power supply voltage malfunction)

Click here

Front speed sensor circuit

Click here

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.

Click here

If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly).

Click here

ABS, BA and/or EBD does not operate efficiently

Check for DTCs again and make sure that DTCs are not output.

Click here

Front speed sensor circuit

Click here

Rear speed sensor circuit

Click here

Stop light switch circuit (on stuck malfunction)

Stop light switch circuit (open malfunction)

Stop light switch circuit (off stuck malfunction)

Click here

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.

Click here

If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly).

Click here

ABS sensor DTC check cannot be done

Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)

Click here

TC and CG terminal circuit

Click here

If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly).

Click here

ABS warning light abnormal (Remains on)

ABS warning light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

ABS warning light abnormal (Does not come on)

ABS warning light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

Brake warning light abnormal (Remains on)

Brake warning light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

Brake warning light abnormal (Does not come on)

Brake warning light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

VSC and/or TRC does not operate

Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)

Click here

Check system variant learning.

Click here

Check the engine control system.

Click here

Power source circuit (low power supply voltage malfunction)

Click here

Power source circuit (high power supply voltage malfunction)

Click here

Check the hydraulic circuit for leaks.

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Front speed sensor circuit

Click here

Rear speed sensor circuit

Click here

Yaw rate and acceleration sensor circuit (sensor malfunction)

Click here

Yaw rate and acceleration sensor circuit (power supply voltage malfunction)

Click here

Acceleration sensor circuit (comparison malfunction)

Click here

Yaw rate sensor circuit (comparison malfunction)

Click here

Yaw rate and acceleration sensor circuit (internal malfunction)

Click here

Steering angle sensor circuit (output malfunction)

Click here

Steering angle sensor circuit (power source voltage malfunction)

Click here

Steering angle sensor circuit (internal malfunction)

Click here

Replace the ECM. (for 1WW)

Click here

Replace the ECM. (for 8NR-FTS)

Click here

Replace the ECM. (for 1ND-TV)

Click here

Replace the ECM. (for 1NR-FE)

Click here

Replace the ECM. (for 1ZR-FAE)

Click here

Replace the ECM. (for 1ZR-FE)

Click here

Replace the ECM. (for 2ZR-FE)

Click here

If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly).

Click here

VSC sensor DTC check cannot be done

Check again to see if DTCs are output. (If DTCs are output, perform diagnosis based on the DTCs that are output.)

Click here

TC and CG terminal circuit

Click here

If the symptoms still occur even after the above suspected areas have been inspected and proved to be normal, replace the skid control ECU (Brake actuator assembly).

Click here

TRC OFF indicator light abnormal (Reminds on)*1.

Multi-information display (TRC OFF message) abnormal (Remains on)*2.

TRC OFF indicator light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

TRC OFF indicator light abnormal (Does not come on)*1.

Multi-information display (TRC OFF message) abnormal (Does not come on)*2.

TRC OFF indicator light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

VSC OFF indicator light abnormal (Reminds on)

VSC OFF indicator light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

VSC OFF indicator light abnormal (Does not come on)

VSC OFF indicator light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

Slip indicator light abnormal (Remains on)

Slip indicator light circuit

Click here

Skid control ECU (Brake actuator assembly)

Click here

Slip indicator light abnormal (Does not come on)

Slip indicator light circuit

Skid control ECU (Brake actuator assembly)

Click here

Sensor check cannot be done

TS and CG terminal circuit

Skid control ECU (Brake actuator assembly)

Click here

*1: except Multi-information Display (Color Type)

*2: for Multi-information Display (Color Type)