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 Code Detection Condition Trouble Area
C1521 Motor overcurrent
  • Harness or connector

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

  • Power steering ECU

C1522 Motor current sensor malfunction
  • Harness or connector

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

  • Power steering ECU

C1523 Excessively large current deviation
  • Harness or connector

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

  • Power steering ECU

C1524 Voltage error between motor terminals
  • Harness or connector

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

  • Power steering ECU

C1532 ECU internal malfunction (Peripheral circuit malfunction) is detected
  • Harness or connector

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

  • Power steering ECU

WIRING DIAGRAM

A01H10BE09
A01H10BE11

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here.

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

    A01GZ7AE01

    1. Disconnect the C1 power steering ECU connector.

    2. Disconnect the C3 power steering 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)
      C1-3 (W) - C3-2 (V)
      C1-1 (V) - Body ground Always 10 kΩ or higher
      C1-2 (U) - Body ground
      C1-3 (W) - Body ground
      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)
      C1-3 (W) - C3-1 (V)
      C1-1 (V) - Body ground Always 10 kΩ or higher
      C1-2 (U) - Body ground
      C1-3 (W) - Body ground

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

    A01GZCOE04

    1. Disconnect the C3 power steering 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)
      1 (W) - 3 (U)
      3 (U) - Body ground* Always 100 kΩ or higher
      2 (V) - Body ground*
      1 (W) - Body ground*
      Standard resistance (for RHD)
      Tester Connection Condition Specified Condition
      3 (U) - 2 (W) Always 0.07 to 10 Ω
      2 (W) - 1 (V)
      1 (V) - 3 (U)
      3 (U) - Body ground* Always 100 kΩ or higher
      2 (W) - Body ground*
      1 (V) - Body ground*

      *: 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 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