Electronic Power Steering System Calibration

Steering. Lexus Is250, Is220D. Gse20 Ale20
Power Steering. Lexus Is250, Is220D. Gse20 Ale20

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

Electronic Power Steering System -- Calibration



ROTATION ANGLE SENSOR VALUE INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION
NOTICE:
Clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, 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 gear assembly has been replaced.
  3. Steering effort differs between left and right.


    Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System.Electronic Power Steering System Calibration

  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 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 Supply
      		ECU power source voltage/
      Min.: 0 V, Max.: 25.5 V
      		Engine switch on (IG)
      		10 to 14 V
      Standard voltage:
      10 to 14 V
      NOTICE:
      If the IG power supply voltage is 10 V or less, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.


    2. Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System.Electronic Power Steering System Calibration

  2. Rotation angle sensor calibration value clear, rotation angle sensor value 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 value 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 "TRQ SENSOR ADJ".

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

      NOTICE:
      1. When initializing the rotation angle sensor value, 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.