POWER STEERING SYSTEM, Diagnostic DTC:C1522, C1523, C1524, C1555

DTC Code DTC Name
C1522 Motor Circuit Malfunction
C1523 Motor Circuit Malfunction
C1524 Motor Circuit Malfunction
C1555 Motor Relay Welding Failure

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
C1522 Motor current sensor malfunction

  • Steering column assembly

  • Power steering ECU
C1523 Excessively large current deviation
C1524 Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1555 Motor relay failure

WIRING DIAGRAM

A01EK7ZE08

INSPECTION PROCEDURE

Note

If the power steering ECU and steering column assembly have been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. READ VALUE USING GTS (MOTOR VOLTAGE)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / EMPS / Data List.

    6. Select the items "Motor Terminal Volt (U)", "Motor Terminal Volt (V)" and "Motor Terminal Volt (W)" in the Data List and read the value displayed on the GTS.

      EMPS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Motor Terminal Volt(U)

      Motor terminal voltage (U phase)/

      Min.: 0 V

      Max.: 46.667 V

      		 During steering operation, value changes within 4 to 46 V range The engine is running and steering wheel is being turned.
      Motor Terminal Volt(V)

      Motor terminal voltage (V phase)/

      Min.: 0 V

      Max.: 46.667 V

      		 During steering operation, value changes within 4 to 46 V range The engine is running and steering wheel is being turned.
      Motor Terminal Volt(W)

      Motor terminal voltage (W phase)/

      Min.: 0 V

      Max.: 46.667 V

      		 During steering operation, value changes within 4 to 46 V range The engine is running and steering wheel is being turned.
      Result
      Result Proceed to
      During steering operation, value changes within 4 to 46 V range A
      During steering operation, voltage is not generated B

    B

    REPLACE STEERING COLUMN ASSEMBLY Click here

    A

    REPLACE POWER STEERING ECU Click here