POWER STEERING SYSTEM, Diagnostic DTC:C1528

DTC Code DTC Name
C1528 Motor Rotation Angle Sensor Malfunction

DESCRIPTION

The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU assembly.

DTC No. DTC Detection Condition Trouble Area
C1528 Motor rotation angle sensor malfunction

  • Power steering motor assembly (motor rotation angle sensor)

  • Power steering ECU assembly

WIRING DIAGRAM

A01JA2QE26

INSPECTION PROCEDURE

Note


  • If the power steering ECU assembly has been replaced with a new one, perform rotation angle sensor initialization and torque sensor zero point calibration Click here.

  • If the electric power steering column sub-assembly or power steering motor assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


    1. Check the installation condition of the motor rotation angle sensor connector.

      OK
      Motor rotation angle sensor connector is securely connected to the power steering ECU assembly.

    NG

    CONNECT CONNECTOR

    OK

  2. READ VALUE USING INTELLIGENT TESTER (MOTOR ROTATION ANGLE SENSOR)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (READY).

    4. Turn the intelligent tester on.

    5. Enter the following menus: Chassis / EMPS / Data List.

    6. Select the item "Motor Rotation Angle" in the Data List and read the value displayed on the intelligent tester.

      EMPS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Motor Rotation Angle

      Motor rotation angle/

      Min.: 0 deg

      Max.: 1441.77 deg

      		 During steering operation, motor rotation angle value changes from 0 to 360° Power switch on (READY) and power steering in operation
      OK
      During steering operation, motor rotation angle value changes from 0 to 360°.

    NG

    CHECK POWER STEERING MOTOR ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

  3. CHECK POWER STEERING MOTOR ASSEMBLY


    1. A01J9MCE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Motor Rotation Angle Sensor)

      Disconnect the connector from the motor rotation angle sensor.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z15-6 (RSIN) - z15-3 (RGND) Always 75.2 to 112.8 Ω
      z15-1 (R+) - z15-3 (RGND) Always 27.6 to 41.4 Ω
      z15-5 (RCOS) - z15-3 (RGND) Always 73.2 to 110.8 Ω

    NG

    REPLACE POWER STEERING MOTOR ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here