POWER STEERING SYSTEM, Diagnostic DTC:C1521, C1522, C1523, C1524, C1532

DTC Code DTC Name
C1521 Motor Circuit Malfunction
C1522 Motor Circuit Malfunction
C1523 Motor Circuit Malfunction
C1524 Motor Circuit Malfunction
C1532 ECU Malfunction

DESCRIPTION

The power steering ECU supplies current to the power steering motor through this circuit.

DTC No. DTC Detection Condition Trouble Area
C1521 Motor overcurrent

  • Wire harness

  • Power steering motor (built into power steering link assembly)

  • Power steering ECU
C1522 Motor current sensor malfunction

  • Wire harness

  • Power steering motor (built into power steering link assembly)

  • Power steering ECU
C1523 Excessively large current deviation

  • Wire harness

  • Power steering motor (built into power steering link assembly)

  • Power steering ECU
C1524 Voltage error between motor terminals

  • Wire harness

  • Power steering motor (built into power steering link assembly)

  • Power steering ECU
C1532 ECU internal malfunction (Peripheral circuit malfunction) is detected

  • Wire harness

  • Power steering motor (built into power steering link assembly)

  • Power steering ECU

WIRING DIAGRAM

A01GJ58E09
A01GJ58E12

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here.

      Result
      DTC Condition Proceed to
      Only DTC C1521, C1522, C1523, C1524 or C1532 is output A
      DTC C1555 is output together with other DTCs B

      Tech Tips

      If DTC C1555 is output, perform troubleshooting for C1555 first.


    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. 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 connector terminals abnormal (w/ VGRS) D
      Power steering link assembly connector terminals abnormal (w/o VGRS) E

      Note


      • If replacing the power steering link assembly, clear the rotation angle sensor value 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

    CONNECT CONNECTORS CORRECTLY

    C

    REPLACE POWER STEERING ECU Click here

    D

    REPLACE POWER STEERING LINK ASSEMBLY (w/ VGRS) Click here

    E

    REPLACE POWER STEERING LINK ASSEMBLY (w/o VGRS) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - POWER STEERING MOTOR)


    1. A01GLVME01

      Disconnect the C1 ECU connector.

    2. Disconnect the C3 motor connector.

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

      Standard resistance (for LHD)
      Tester Connection Condition Specified Condition
      C1-1 (V) - C3-1 (W) Always Below 1 Ω
      C1-2 (U) - C3-3 (U) Always Below 1 Ω
      C1-3 (W) - C3-2 (V) Always Below 1 Ω
      C1-1 (V) - Body ground Always 10 kΩ or higher
      C1-2 (U) - Body ground Always 10 kΩ or higher
      C1-3 (W) - Body ground Always 10 kΩ or higher
      Standard resistance (for RHD)
      Tester Connection Condition Specified Condition
      C1-1 (V) - C3-3 (U) Always Below 1 Ω
      C1-2 (U) - C3-2 (W) Always Below 1 Ω
      C1-3 (W) - C3-1 (V) Always Below 1 Ω
      C1-1 (V) - Body ground Always 10 kΩ or higher
      C1-2 (U) - Body ground Always 10 kΩ or higher
      C1-3 (W) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT POWER STEERING LINK ASSEMBLY (POWER STEERING MOTOR)

    A01GIKGE03

    1. Disconnect the C3 motor connector.

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

      Standard resistance (for LHD)
      Tester Connection Condition Specified Condition
      3 (U) - 2 (V) Always 0.07 to 10 Ω
      2 (V) - 1 (W) Always 0.07 to 10 Ω
      1 (W) - 3 (U) Always 0.07 to 10 Ω
      3 (U) - Body ground* Always 100 kΩ or higher
      2 (V) - Body ground* Always 100 kΩ or higher
      1 (W) - Body ground* Always 100 kΩ or higher
      Standard resistance (for RHD)
      Tester Connection Condition Specified Condition
      3 (U) - 2 (W) Always 0.07 to 10 Ω
      2 (W) - 1 (V) Always 0.07 to 10 Ω
      1 (V) - 3 (U) Always 0.07 to 10 Ω
      3 (U) - Body ground* Always 100 kΩ or higher
      2 (W) - Body ground* Always 100 kΩ or higher
      1 (V) - Body ground* Always 100 kΩ or higher

      *: Touch the negative probe to the power steering link assembly housing at the position shown in the illustration to perform the measurement.

      Note


      • If replacing the power steering link assembly, clear the rotation angle sensor value 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.

      Result
      Result Proceed to
      OK A
      NG (w/ VGRS) B
      NG (w/o VGRS) C

    B

    REPLACE POWER STEERING LINK ASSEMBLY (w/ VGRS) Click here

    C

    REPLACE POWER STEERING LINK ASSEMBLY (w/o VGRS) Click here

    A

    REPLACE POWER STEERING ECU Click here