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

  • Power steering motor assembly (Motor rotation angle sensor)

  • Power steering ECU assembly

WIRING DIAGRAM

A011X2GE02

INSPECTION PROCEDURE

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.
    NG

    CONNECT CONNECTOR

    OK

  2. READ VALUE USING TECHSTREAM (MOTOR ROTATION ANGLE SENSOR)

    1. Turn the power switch off.

    2. Connect the Techstream to the DLC3.

    3. Turn the power switch on (READY).

    4. Turn the Techstream 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 Techstream.

      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°.
    NG

    CHECK POWER STEERING MOTOR ASSEMBLY (MOTOR ROTATION ANGLE SENSOR) Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

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

    1. Disconnect the connector from the motor rotation angle sensor.

      A011W8QE02

    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
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Motor Rotation Angle Sensor)
    NG

    REPLACE POWER STEERING MOTOR ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here