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

If the power steering ECU assembly detects these DTCs, it will shut off the motor current sensor, power source relay, motor relay circuit (built into the power steering ECU assembly) and stop power assistance.

DTC No. DTC Detection Condition Trouble Area
C1521 Motor overcurrent
  • Wire harness or connector

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

  • Power steering ECU assembly

C1522 Motor current sensor malfunction
C1523 Excessively large current deviation
C1524 Voltage error between motor terminals
C1532 ECU internal malfunction (Peripheral circuit malfunction) is detected

WIRING DIAGRAM

A0160CWE01

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 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
    C
    D
    A
  3. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - POWER STEERING MOTOR)


    1. A0161GAE02

      Disconnect the C5 connector from the power steering ECU assembly.

    2. Disconnect the C3 connector from the power steering motor.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C5-1 (V) - C3-2 (V) Always Below 1 Ω
      C5-2 (U) - C3-3 (U) Always Below 1 Ω
      C5-3 (W) - C3-1 (W) Always Below 1 Ω
      C5-1 (V) - Body ground Always 10 kΩ or higher
      C5-2 (U) - Body ground Always 10 kΩ or higher
      C5-3 (W) - Body ground Always 10 kΩ or higher

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


    1. A01617UE07
      A0161J2E07

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C3-3 (U) - C3-2 (V) Always 0.07 to 10 Ω
      C3-2 (V) - C3-1 (W) Always 0.07 to 10 Ω
      C3-1 (W) - C3-3 (U) Always 0.07 to 10 Ω
      C3-3 (U) - Body ground* Always 100 kΩ or higher
      C3-2 (V) - Body ground* Always 100 kΩ or higher
      C3-1 (W) - Body ground* Always 100 kΩ or higher

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

      Note


      • If replacing the power steering gear assembly, clear the rotation angle sensor value calibration value, initialize the rotation angle sensor, 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
    OK