POWER STEERING SYSTEM > CALIBRATION

for Preparation Click here



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 steering column assembly has been replaced.
  3. Steering effort differs between turning left and right.

  1. Inspection before calibration

    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the intelligent tester on.

    5. Calibrate the power steering ECU assembly. Enter the following menus: Chassis / EMPS / Data List.

    6. Check the values by referring to the table below.

      EMPS 
      Tester Display
      		Measurement Item/Range
      		Normal Condition
      		Diagnostic Note
      IG Power Supply
      		ECU power source voltage/
      Min.: 0 V
      Max.: 20.1531 V
      		9 to 16 V
      		Power switch on (IG)

      Standard Voltage:
      9 to 16 V

      NOTICE:
      If the IG power supply voltage is 9 V or less, calibration cannot be performed. In this case, charge or replace the auxiliary battery, and then perform 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 DTCs before starting calibration.
    2. If DTC C1526 (Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor value cannot be initialized. Clear the DTCs before starting initialization.


    1. Set the steering wheel to the center point and align the front wheels straight ahead.

    2. Turn the power switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

    5. Turn the intelligent tester on.

    6. Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.

      NOTICE:
      1. Do not turn the steering wheel sharply.
      2. Do not touch the steering wheel during torque sensor zero point calibration (for 3 seconds).

    7. Check for DTCs (Click here).

      NOTICE:
      1. After rotation angle sensor value initialization and zero point calibration completes normally, confirm that no DTCs are output.
      2. If DTC C1515, C1516, C1525, C1526, C1534 or C1581 is output, perform troubleshooting for the corresponding DTC.

        Result:
        Result
        		See Procedure
        DTC C1515 is output.
        		 Click here
        DTC C1516 is output.
        		 Click here
        DTC C1525 is output.
        		 Click here
        DTC C1526 is output.
        		 Click here
        DTC C1534 is output.
        		 Click here
        DTC C1581 is output.
        		 Click here


ASSIST MAP WRITING

HINT:
If DTC C1581 is output after torque sensor zero point calibration, perform assist map writing.

  1. Turn the power switch off.

  2. Connect the intelligent tester to the DLC3.

  3. Turn the power switch on (IG).

  4. Turn the intelligent tester on.

  5. Enter the following menus: Chassis / EMPS / Utility / Signal Check.

    HINT:
    1. Follow the instructions on the intelligent tester to perform Signal Check.
    2. With DTC C1581 output, performing Signal Check will cause the power steering ECU assembly to enter Test Mode and the assist map will be written automatically.

  6. Wait for at least 1 second.

  7. Check for DTCs (Click here).

    HINT:
    After writing the assist map, if DTC C1581 is output, perform the troubleshooting procedure for DTC C1581 (Click here).