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. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
C1528/12 Motor Rotation Angle Sensor Malfunction Motor rotation angle sensor malfunction

  • Power steering motor assembly (Motor rotation angle sensor)

  • Power steering ECU assembly

 On Ignition switch ON again

WIRING DIAGRAM

A00YU3CE07

CAUTION / NOTICE / HINT

Note

If the power steering ECU assembly has been replaced, perform assist map writing Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


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

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

    NG

    CONNECT CONNECTOR

    OK

  2. READ VALUE USING GTS (MOTOR ROTATION ANGLE)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    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.


      Chassis > EMPS > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Motor Rotation Angle Motor rotation angle

      Min.: 0.000 deg

      Max.: 1441.770 deg

      		 Engine running and steering wheel being turned: During steering operation, motor rotation angle value changes from 0 to 360 deg -

      Chassis > EMPS > Data List
      Tester Display
      Motor Rotation Angle
      OK
      During steering operation, motor rotation angle value changes from 0 to 360°.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  3. CHECK POWER STEERING MOTOR ASSEMBLY (MOTOR ROTATION ANGLE SENSOR)


    1. A00YW9YC03
      *a

      Front view of wire harness connector

      (to Motor Rotation Angle Sensor)

      Disconnect the b motor rotation angle sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      b-6 (RZV1) - b-2 (RZV2) 25°C (77°F) 14.0 to 17.2 Ω
      b-5 (RZCS1) - b-1 (RZCS2) 25°C (77°F) 25.8 to 31.6 Ω
      b-7 (RZSN1) - b-3 (RZSN2) 25°C (77°F) 25.8 to 31.6 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE POWER STEERING MOTOR ASSEMBLY Click here