POWER STEERING SYSTEM CALIBRATION


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

    Note

    Initialize the rotation angle sensor and calibrate the torque sensor zero point if any of the following conditions occur:


    • The power steering ECU is replaced.

    • The steering column assembly is replaced.

    • Steering effort differs between turning left and right.

    Tech Tips

    When rotation angle sensor initialization and torque sensor zero point calibration are performed, the rotation angle sensor value initialization and the torque sensor zero point calibration are performed at the same time.


    1. Inspection before calibration


      1. Turn the ignition switch off.

      2. Connect the GTS to the DLC3.

      3. Turn the ignition switch to ON.

      4. Turn the GTS on.

      5. 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 The ignition switch is ON.

        Note

        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.

      7. Rotation angle sensor 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 cannot be initialized. Clear the DTC before starting initialization.


        1. Turn the ignition switch off.

        2. Connect the GTS to the DLC3.

        3. Turn the ignition switch to ON.

        4. Turn the GTS on.

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

        6. According to the display on the GTS, perform calibration.

          Note


          • Set the steering wheel to the center point and align the front tires straight ahead.

          • Do not turn the steering wheel sharply.

          • Do not touch the steering wheel during the rotation angle sensor initialization and torque sensor zero point calibration (for 3 seconds).

      8. ASSIST MAP CONFIRMATION / CLEAR


        1. Check assist map


          1. Connect the GTS to the DLC3.

          2. Turn the ignition switch to ON.

          3. Turn the GTS on.

          4. Enter the following menus: Chassis / EMPS / Utility / Assist Map Confirmation / Clear.

          5. Check that "MAP2" is displayed on the GTS screen.

        2. Clear assist map


          1. Connect the GTS to the DLC3.

          2. Turn the ignition switch to ON.

          3. Turn the GTS on.

          4. Enter the following menus: Chassis / EMPS / Utility / Assist Map Confirmation / Clear.

          5. Clear the assist map following the instructions on the GTS screen.

          6. Start the engine.

          7. Enter the following menus: Chassis / EMPS / Utility / Assist Map Confirmation / Clear.

          8. Check that "MAP2" is displayed on the GTS screen.