POWER STEERING SYSTEM, Diagnostic DTC:C1515, C1516, C1525, C1526

DTC Code DTC Name
C1515 Torque Sensor Zero Point Adjustment Undone
C1516 Torque Sensor Zero Point Adjustment Incomplete
C1525 Rotation Angle Sensor Initialization Undone
C1526 Rotation Angle Sensor Initialization Incomplete

DESCRIPTION


DTC No. DTC Detection Condition Procedure
C1515 This DTC is detected when torque sensor zero point calibration has not been performed. There is no malfunction if this DTC is not output again after performing zero point calibration.
C1516 Steering zero point calibration is incomplete due to the steering wheel being touched during calibration. There is no malfunction if this DTC is not output again after clearing the DTCs and torque sensor calibration value, and performing zero point calibration.
C1525 This DTC is detected when rotation angle sensor value initialization has not been performed. There is no malfunction if this DTC is not output again after performing rotation angle sensor value initialization.
C1526 Rotation angle sensor value initialization is incomplete due to the steering wheel being touched during calibration. There is no malfunction if this DTC is not output again after clearing the DTCs and torque sensor calibration value, and performing rotation angle sensor value initialization.

WIRING DIAGRAM

A01611WE13

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here. If DTCs C1515 and C1526 are output, clear the DTCs Click here.


    NEXT

  2. INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT


    1. Initialize the rotation angle sensor and calibrate the torque sensor zero point Click here.


    NEXT

  3. RECONFIRM DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 3 times*1. A
      DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 1 or 2 times*2. B
      Normal system code is output. C

      Tech Tips


      • *1: The power steering ECU assembly must be replaced if DTCs are still output even after initialize the rotation angle sensor and calibrate the torque sensor zero point.

      • *2: Perform the rotation angle sensor initialization and torque sensor zero point calibration again if DTCs are still output even after the initialization and calibration is performed 1 or 2 times.


    B

    INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT Click here

    C

    END

    A

  4. CHECK CONNECTORS


    1. Check the connection of the power steering ECU and rack and pinion power steering gear connectors.

    2. Visually inspect the terminals of the power steering ECU and rack and pinion power steering gear connectors.

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

      Note


      • If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point Click here.

      • If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    B

    CONNECT CONNECTORS CORRECTLY

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    D

    REPLACE POWER STEERING GEAR ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - POWER STEERING GEAR ASSEMBLY)


    1. A015ZNSE02

      Disconnect the C4 ECU connector.

    2. Disconnect the C1 sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C1-1 (INCS) - C4-10 (INCS) Always Below 1 Ω
      C1-2 (INSN) - C4-9 (INSN) Always Below 1 Ω
      C1-4 (TRQV) - C4-4 (TRQV) Always Below 1 Ω
      C1-5 (OUCS) - C4-12 (OUCS) Always Below 1 Ω
      C1-6 (OUSN) - C4-11 (OUSN) Always Below 1 Ω
      C1-7 (TQG2) - C4-13 (TQG2) Always Below 1 Ω
      C1-8 (TQG1) - C4-6 (TQG1) Always Below 1 Ω
      C1-1 (INCS) - Body ground Always 10 kΩ or higher
      C1-2 (INSN) - Body ground Always 10 kΩ or higher
      C1-4 (TRQV) - Body ground Always 10 kΩ or higher
      C1-5 (OUCS) - Body ground Always 10 kΩ or higher
      C1-6 (OUSN) - Body ground Always 10 kΩ or higher
      C1-7 (TQG2) - Body ground Always 10 kΩ or higher
      C1-8 (TQG1) - Body ground Always 10 kΩ or higher
    4. A0161P5E03

      Disconnect the C2 sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C2-1 (RZSN) - C4-7 (RZSN) Always Below 1 Ω
      C2-2 (RZG) - C4-1 (RZG) Always Below 1 Ω
      C2-3 (RZV) - C4-3 (RZV) Always Below 1 Ω
      C2-4 (RZCS) - C4-8 (RZCS) Always Below 1 Ω
      C2-1 (RZSN) - Body ground Always 10 kΩ or higher
      C2-2 (RZG) - Body ground Always 10 kΩ or higher
      C2-3 (RZV) - Body ground Always 10 kΩ or higher
      C2-4 (RZCS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT HARNESS AND CONNECTOR (TORQUE SENSOR AND MOTOR ROTATION ANGLE SENSOR)


    1. Disconnect the C1 torque sensor connector.

    2. A0162FQE02

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C1-1 (INCS) - C1-7 (TQG2) Always 90 to 170 Ω
      C1-2 (INSN) - C1-7 (TQG2) Always 300 to 430 Ω
      C1-4 (TRQV) - C1-8 (TQG1) Always 4 to 14 Ω
      C1-5 (OUCS) - C1-7 (TQG2) Always 90 to 170 Ω
      C1-6 (OUSN) - C1-7 (TQG2) Always 300 to 430 Ω

    3. Disconnect the C2 motor rotation angle sensor connector.

    4. A015YXTE01

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C2-1 (RZSN) - C2-2 (RZG) Always 50 to 140 Ω
      C2-3 (RZV) - C2-2 (RZG) Always 15 to 45 Ω
      C2-4 (RZCS) - C2-2 (RZG) Always 50 to 140 Ω

      Note


      • If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point Click here.

      • If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    NG

    REPLACE POWER STEERING GEAR ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here