POWER STEERING SYSTEM, Diagnostic DTC:C1528/12

DTC Code DTC Name
C1528/12 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
C1528/12 Motor rotation angle sensor malfunction

  • Motor rotation angle sensor (built into steering column assembly)

  • Power steering ECU assembly

WIRING DIAGRAM

A005D4KE10
*a Motor Rotation Angle Sensor (built into Steering Column Assembly)
*b Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


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

  • If the steering column assembly has been replaced with a new one, perform rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value 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 GTS


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (READY).

    4. Turn the GTS 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 GTS.

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

      Motor rotation angle/

      Min.: 0.000 deg

      Max.: 1441.770 deg

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

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  3. CHECK STEERING COLUMN ASSEMBLY


    1. A0059X6E02
      Text in Illustration
      *a

      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 (RZSN) - z15-3 (RZG) Always 75.2 to 112.8 Ω
      z15-1 (RZV) - z15-3 (RZG) Always 27.6 to 41.4 Ω
      z15-5 (RZCS) - z15-3 (RZG) Always 73.2 to 110.8 Ω

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE STEERING COLUMN ASSEMBLY Click here