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

These DTCs do not indicate a malfunction. The power steering ECU assembly stores these DTCs when it determines that rotation angle sensor initialization and torque sensor zero point calibration have not been performed.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1515 Torque Sensor Zero Point Adjustment Undone Torque sensor zero point calibration has not been performed. - EPS warning light: Comes on There is no malfunction if this DTC is not output again after performing zero point calibration.
C1516 Torque Sensor Zero Point Adjustment Incomplete Torque sensor zero point calibration is incomplete due to the steering wheel being touched during calibration. - EPS warning light: Comes on There is no malfunction if this DTC is not output again after clearing the DTC and performing zero point calibration.
C1525 Rotation Angle Sensor Initialization Undone Rotation angle sensor initialization has not been performed. - EPS warning light: Comes on There is no malfunction if this DTC is not output again after performing rotation angle sensor initialization.
C1526 Rotation Angle Sensor Initialization Incomplete Rotation angle sensor initialization is incomplete due to the steering wheel being touched during calibration. - EPS warning light: Comes on There is no malfunction if this DTC is not output again after clearing the DTC and then performing rotation angle sensor initialization.

WIRING DIAGRAM

A01MS1BE04

CAUTION / NOTICE / HINT

Note


  • If the power steering ECU assembly has been replaced, perform assist map writing, rotation angle sensor initialization and torque sensor zero point calibration.

    Click here

  • If the power steering link assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration.

    Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes

    2. If DTCs C1516 and C1526 are output, clear the DTCs.

      Click here


      Chassis > EMPS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

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


    1. Perform rotation angle sensor initialization and torque sensor zero point calibration.

      Click here


      Chassis > EMPS > Utility
      Tester Display
      Torque Sensor Adjustment
      Result
      Proceed to
      NEXT

    NEXT

  3. RECONFIRM DTC


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTCs are still output after performing rotation angle sensor initialization and steering zero point calibration 3 times. A
      DTCs are still output after performing rotation angle sensor initialization and steering zero point calibration once or twice. B
      DTCs are not output. C

    B

    INITIALIZE MOTOR ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT

    C

    END

    A

  4. 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 PROPERLY

    C

    REPLACE POWER STEERING ECU ASSEMBLY for LHD: Click here
    REPLACE POWER STEERING ECU ASSEMBLY for RHD: Click here

    D

    REPLACE POWER STEERING LINK ASSEMBLY Click here

    A

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


    1. Disconnect the C5 power steering ECU assembly connector.

    2. Disconnect the C3 torque sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C3-7 (TQG2) - C5-13 (TQG2) Always Below 1 Ω
      C3-2 (INSN) - C5-9 (INSN) Always Below 1 Ω
      C3-5 (OUCS) - C5-12 (OUCS) Always Below 1 Ω
      C3-6 (OUSN) - C5-11 (OUSN) Always Below 1 Ω
      C3-1 (INCS) - C5-10 (INCS) Always Below 1 Ω
      C3-8 (TQG1) - C5-6 (TQG1) Always Below 1 Ω
      C3-4 (TRQV) - C5-4 (TRQV) Always Below 1 Ω
      C3-7 (TQG2) - Body ground Always 10 kΩ or higher
      C3-2 (INSN) - Body ground Always 10 kΩ or higher
      C3-5 (OUCS) - Body ground Always 10 kΩ or higher
      C3-6 (OUSN) - Body ground Always 10 kΩ or higher
      C3-1 (INCS) - Body ground Always 10 kΩ or higher
      C3-8 (TQG1) - Body ground Always 10 kΩ or higher
      C3-4 (TRQV) - Body ground Always 10 kΩ or higher

    4. Disconnect the C2 motor rotation angle sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C2-2 (RZG) - C5-1 (RZG) Always Below 1 Ω
      C2-4 (RZCS) - C5-8 (RZCS) Always Below 1 Ω
      C2-1 (RZSN) - C5-7 (RZSN) Always Below 1 Ω
      C2-3 (RZV) - C5-3 (RZV) Always Below 1 Ω
      C2-2 (RZG) - Body ground Always 10 kΩ or higher
      C2-4 (RZCS) - Body ground Always 10 kΩ or higher
      C2-1 (RZSN) - Body ground Always 10 kΩ or higher
      C2-3 (RZV) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT POWER STEERING LINK ASSEMBLY (TORQUE SENSOR AND MOTOR ROTATION ANGLE SENSOR)


    1. Disconnect the C3 torque sensor connector.

    2. A01MSNUC02
      *a

      Component without harness connected

      (Torque Sensor)

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

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

    3. Disconnect the C2 motor rotation angle sensor connector.

    4. A01MRRZC02
      *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
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY for LHD: Click here
    REPLACE POWER STEERING ECU ASSEMBLY for RHD: Click here

    NG

    REPLACE POWER STEERING LINK ASSEMBLY Click here