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 Code Detection Condition Trouble Area
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

A01H0EUE21

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 value 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 A
      DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration once or twice B
      DTC is not output C

      Tech Tips

      Replace the power steering ECU if DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 3 times.


    B
    C
    A
  4. CHECK CONNECTORS


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

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

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

      Note


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


    B
    C
    D
    A
  5. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - POWER STEERING LINK ASSEMBLY)


    1. A01GWL9E02

      Disconnect the C2 ECU connector.

    2. Disconnect the C5 sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C5-1 (INCS) - C2-10 (INCS) Always Below 1 Ω
      C5-2 (INSN) - C2-9 (INSN) Always Below 1 Ω
      C5-4 (TRQV) - C2-4 (TRQV) Always Below 1 Ω
      C5-5 (OUCS) - C2-12 (OUCS) Always Below 1 Ω
      C5-6 (OUSN) - C2-11 (OUSN) Always Below 1 Ω
      C5-7 (TQG2) - C2-13 (TQG2) Always Below 1 Ω
      C5-8 (TQG1) - C2-6 (TQG1) Always Below 1 Ω
      C5-1 (INCS) - Body ground Always 10 kΩ or higher
      C5-2 (INSN) - Body ground Always 10 kΩ or higher
      C5-4 (TRQV) - Body ground Always 10 kΩ or higher
      C5-5 (OUCS) - Body ground Always 10 kΩ or higher
      C5-6 (OUSN) - Body ground Always 10 kΩ or higher
      C5-7 (TQG2) - Body ground Always 10 kΩ or higher
      C5-8 (TQG1) - Body ground Always 10 kΩ or higher
    4. A01GZGYE02

      Disconnect the C4 sensor connector.

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

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

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


    1. A01GYFIE01

      Disconnect the C5 torque sensor connector.

    2. 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 C4 motor rotation angle sensor connector.

    4. A01GXQME02

      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

      Note


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


    NG
    OK