POWER STEERING SYSTEM, Diagnostic DTC:C1524, C1555

DTC Code DTC Name
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
C1524 Short (or open) in motor circuit or abnormal voltage or current in motor circuit

  • Steering column assembly (Power steering motor)

  • Power steering ECU
C1555 Motor relay circuit malfunction

WIRING DIAGRAM

A017E5NE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (MOTOR VOLTAGE)


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch on (IG).

    4. Turn the intelligent tester on.

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

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

      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

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Motor Terminal Volt(V)

      Motor terminal voltage (V phase):

      Min.: 0 V

      Max.: 46.667 V

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Motor Terminal Volt(W)

      Motor terminal voltage (W phase):

      Min.: 0 V

      Max.: 46.667 V

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Result
      Result Proceed to
      When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. A
      When the steering wheel is turned, a value other than the above is displayed. B

    B

    REPLACE STEERING COLUMN ASSEMBLY Click here

    A

    REPLACE POWER STEERING ECU Click here