Anti-Lock Brake System Calibration

  1. DESCRIPTION

  1. OBTAIN ZERO POINT OF ACCELERATION SENSOR (When Using Intelligent Tester)

  1. OBTAIN ZERO POINT OF ACCELERATION SENSOR (When Using SST Check Wire)

Anti-Lock Brake System -- Calibration



DESCRIPTION
  1. Follow the chart to perform calibration.

Part Replaced
Necessary Operation
Brake actuator assembly (Skid control ECU)
  1. Clearing zero point calibration data
  2. Acceleration sensor zero point calibration
Acceleration sensor
  1. Clearing zero point calibration data
  2. Acceleration sensor zero point calibration

OBTAIN ZERO POINT OF ACCELERATION SENSOR (When Using Intelligent Tester)
NOTICE:
  1. While obtaining the zero points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
  2. Be sure to perform this procedure on a level surface (with an inclination of less than 1%).

  1. Clear the zero point calibration data.

    1. Turn the ignition switch off.

    2. Check that the steering wheel is centered.

    3. Check that the shift lever is in neutral and apply the parking brake.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the intelligent tester on.

    7. Enter the following menus: Chassis / ABS/VSC/TRC / Reset Memory.

    8. Check that the ABS warning light comes on.

    9. Turn the ignition switch off.

  2. Perform zero point calibration of the acceleration sensor.

    1. Turn the ignition switch off.

    2. Check that the steering wheel is centered.

    3. Check that the shift lever is in neutral and apply the parking brake.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the intelligent tester on.

    7. Switch the skid control ECU to test mode using the intelligent tester.
      Enter the following menus: Chassis / ABS/VSC/TRC / Test Mode.

    8. Keep the vehicle stationary on a level surface for 2 seconds or more.

    9. Check that the ABS warning light blinks in the test mode pattern (0.125 seconds on and 0.125 seconds off).

      HINT:
      1. If the ABS warning light does not blink, perform zero point calibration again.
      2. The zero point calibration is performed only once after the system enters test mode.
      3. Calibration cannot be performed again until the stored data is cleared.

    10. Turn the ignition switch off and disconnect the intelligent tester.


OBTAIN ZERO POINT OF ACCELERATION SENSOR (When Using SST Check Wire)
NOTICE:
  1. While obtaining the zero points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
  2. Be sure to perform this procedure on a level surface (with an inclination of less than 1%).


  1. Clear the zero point calibration data.

    1. Turn the ignition switch off.

    2. Check that the steering wheel is centered.

    3. Check that the shift lever is in neutral and apply the parking brake.

    4. Turn the ignition switch to ON.

    5. The ABS warning light comes on for 3 seconds to indicate that the initial check is completed.



      6. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Anti-Lock Brake System Calibration

    6. Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.

      Text in Illustration
      *a
      		Front view of DLC3
      SST
      09843-18040

    7. Check that the ABS warning light comes on.



  2. Perform zero point calibration of the acceleration sensor.

    1. Turn the ignition switch off.

    2. Check that the steering wheel is centered.

    3. Check that the shift lever is in neutral and apply the parking brake.



      4. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Anti-Lock Brake System Calibration

    4. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

      Text in Illustration
      *a
      		Front view of DLC3
      SST
      09843-18040

    5. Turn the ignition switch to ON.

    6. Keep the vehicle stationary on a level surface for 2 seconds or more.

    7. Check that the ABS warning light blinks in the test mode pattern (0.125 seconds on and 0.125 seconds off).

      HINT:
      1. If the ABS warning light does not blink, perform zero point calibration again.
      2. The zero point calibration is performed only once after the system enters test mode.
      3. Calibration cannot be performed again until the stored data is cleared.

    8. Turn the ignition switch off and disconnect SST from the DLC3.