POWER STEERING SYSTEM(for 2AR-FSE), 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 Code DTC Detection Condition Trouble Area
C1528/12 A motor rotation angle sensor malfunction.

  • Motor rotation angle sensor (built into power steering link assembly)

  • Harness or connector

  • Power steering ECU assembly

WIRING DIAGRAM

A000QEYE11
*a Shielded
*b Motor Rotation Angle Sensor (Power Steering Link Assembly)
*c Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the power steering ECU assembly is replaced with a new one, perform assist map writing, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.

  • If the power steering link assembly is replaced, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. Check the connection of the power steering ECU assembly and power steering link assembly connectors.

    2. Visually inspect the terminals of the power steering ECU assembly and power steering link assembly connectors.

      Result
      Result Proceed to
      Normal A
      Connectors not properly connected B
      Power steering ECU assembly connector terminals abnormal C
      Power steering link assembly connector terminals abnormal D

    B

    CONNECT CONNECTORS CORRECTLY

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    D

    REPLACE POWER STEERING LINK ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - MOTOR ROTATION ANGLE SENSOR)


    1. Disconnect the C2 motor rotation angle sensor connector.

    2. Disconnect the C7 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C2-2 (RZG) - C7-1 (RZG) Always Below 1 Ω
      C2-4 (RZCS) - C7-8 (RZCS) Always Below 1 Ω
      C2-1 (RZSN) - C7-7 (RZSN) Always Below 1 Ω
      C2-3 (RZV) - C7-3 (RZV) Always Below 1 Ω
      C2-2 (RZG) or C7-1 (RZG) - Body ground Always 10 kΩ or higher
      C2-4 (RZCS) or C7-8 (RZCS) - Body ground Always 10 kΩ or higher
      C2-1 (RZSN) or C7-7 (RZSN) - Body ground Always 10 kΩ or higher
      C2-3 (RZV) or C7-3 (RZV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT POWER STEERING LINK ASSEMBLY (MOTOR ROTATION ANGLE SENSOR)


    1. Disconnect the C2 motor rotation angle sensor connector.

    2. A000OXWE01
      Text in Illustration
      *a

      Component without harness connected

      (Motor Rotation Angle Sensor)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (RZSN) - 2 (RZG) Always 50 to 140 Ω
      3 (RZV) - 2 (RZG) Always 15 to 45 Ω
      4 (RZCS) - 2 (RZG) Always 50 to 140 Ω

    NG

    REPLACE POWER STEERING LINK ASSEMBLY Click here

    OK

  4. REPLACE POWER STEERING ECU ASSEMBLY


    1. Replace the power steering ECU assembly Click here.


    NEXT

  5. ASSIST MAP WRITING, INITIALIZE MOTOR ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT


    1. Perform assist map writing, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.


    NEXT

  6. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch on (IG).

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1528/12 is not output A
      DTC C1528/12 is output B

    A

    END

    B

    REPLACE POWER STEERING LINK ASSEMBLY Click here