BRAKE ACTUATOR (w/o VSC) ON-VEHICLE INSPECTION


  1. CONNECT INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and idle it.

    3. Select the Active Test mode on the intelligent tester.

      Tech Tips

      Refer to the intelligent tester operator's manual for further details.

  2. CHECK ACTUATOR MOTOR OPERATION

    Note

    Do not keep the motor relay on for more than 5 seconds. When operating it consecutively, wait 20 seconds between each operation.


    1. Turn the motor relay on and check the actuator motor operation noise.

      If the operation noise cannot be heard, replace the actuator because the motor is defective.

    2. Turn the motor relay off.

    3. Depress the brake pedal and hold it for approximately 15 seconds, and check that the brake pedal does not go down further.

      If the brake pedal goes down further, replace the actuator because the sealing condition of the reduction solenoid valve is abnormal.

    4. Check that the brake pedal does not pulsate when the motor relay is turned on by the intelligent tester.

      If the brake pedal pulsates, replace the actuator because the sealing condition of the reduction solenoid valve is abnormal.

    5. Turn the motor relay off.

  3. CHECK BRAKE ACTUATOR SOLENOID (for Front Right Wheel)

    Note


    • Do not keep the motor relay on for more than 5 seconds. When operating it consecutively, wait 20 seconds between each operation.

    • Do not keep a solenoid on for more than 2 seconds. When operating a solenoid consecutively, wait 20 seconds between each operation.

    • Never depress the brake pedal when only the reduction solenoid is turned on as the skid control ECU will be reset.


    1. Depress the brake pedal and hold it.

    2. Check that the brake pedal does not go down further when the SFRH and SFRR solenoids are turned on by the intelligent tester.

      If the brake pedal goes down further, replace the actuator because the holding solenoid valve operation is abnormal.

      Tech Tips

      To protect the solenoids, the intelligent tester turns off the solenoid automatically 2 seconds after one of the solenoids has been turned on.

    3. Check that the brake pedal goes down further when the solenoids are turned off.

      If the brake pedal does not go down further, replace the actuator because the reduction solenoid valve operation is abnormal.

    4. Check that the brake pedal returns to the fully depressed position when the motor relay is turned on by the intelligent tester.

      If the brake pedal does not return to the fully depressed position, replace the actuator because the motor is defective.

    5. Turn the motor relay off and release the brake pedal.

  4. CHECK BRAKE ACTUATOR SOLENOID (for Front Left Wheel)


    1. Use the same procedures described for the front right wheel to check the solenoids of the front left wheel.

      Tech Tips

      Solenoids for front left wheel: SFLH, SFLR

  5. CHECK BRAKE ACTUATOR SOLENOID (for Rear Right Wheel)


    1. Use the same procedures described for the front right wheel to check the solenoids of the rear right wheel.

      Tech Tips

      Solenoids for rear right wheel: SRRH, SRRR

  6. CHECK BRAKE ACTUATOR SOLENOID (for Rear Left Wheel)


    1. Use the same procedures described for the front right wheel to check the solenoids of the rear left wheel.

      Tech Tips

      Solenoids for rear left wheel: SRLH, SRLR

  7. CHECK AND CLEAR DTC


    1. Check and clear the DTCs Click here.