Electronic Power Steering System Calibration

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Power Steering. Lexus Gs430, Gs300. Uzs190 Grs190

  1. ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION

Electronic Power Steering System -- Calibration



ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION
NOTICE:
Clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point if any of the following has occurred:
  1. The power steering ECU assembly has been replaced.
  2. The power steering link assembly has been replaced.
  3. Steering effort differs between left and right.

  1. Inspection before calibration

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Select "IG Power Supply" from the data list.

    5. Check the IG power supply voltage on the tester screen.

      Item
      		Measurement
      Item/Range
      (Display)
      		Inspection Condition
      		Reference Value
      IG Power Supply
      		ECU power source voltage/
      Min.: 0 V, Max.: 25.5 V
      		Engine switch on (IG)
      		10 to 14 V

      Voltage:
      10 to 14 V
      NOTICE:
      If the IG power supply voltage is 9 V or less, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.

  2. Rotation angle sensor calibration value clear, rotation angle sensor initialization, and torque sensor zero point calibration

    NOTICE:
    1. If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTC before starting calibration.
    2. If DTC C1526 (Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor cannot be initialized. Clear the DTC before starting initialization.

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Select "Utility".

    5. Select "Torque Sensor Adjustment".

    6. Follow the procedures on the tester display to clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point.

      NOTICE:
      1. When initializing the rotation angle sensor, observe the following to stabilize sensor voltage:
        After turning the engine switch on (IG), wait for at least 2.5 seconds before turning the steering wheel. Do not turn the steering wheel quickly.
      2. The steering wheel will vibrate during torque sensor zero point calibration. Do not touch the steering wheel while it is vibrating or for 2 seconds after it stops.