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Power Steering System: Calibration

  1. ROTATION ANGLE SENSOR VALUE INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION 
    NOTE: 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:
    • The power steering ECU assembly has been replaced.
    • The power steering gear assembly has been replaced.
    • Steering effort differs between left and right.
    1. Inspection before calibration
      1. Turn the engine switch off.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG)
      4. Turn the Techstream on.
      5. Check the IG power supply voltage on the Techstream. Enter the following menus. Chassis / EMPS / Data List.

      EMPS 

      MEASUREMENT ITEM/RANGE NORMAL CONDITION CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG Power Supply ECU power source voltage/
      Min 0 V
      Max 20 1531 V      		 11 to 14 V Engine switch on (IG)

      Standard voltage: 

      11 to 14 V 

      NOTE: If the IG power supply voltage is less than 11 V, 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 value initialization, and torque sensor zero point calibration.
    NOTE:
    • 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.
    • 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. Turn the engine switch off.
    2. Connect the Techstream to the DLC3
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on
    5. Follow the procedures on the Techstream to clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point. Enter the following menus. Chassis / EMPS / Utility / Torque Sensor Adjustment.
    NOTE:
    • 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.

    • 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.
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