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

C240263E07

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. C238938C03

      *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