POWER STEERING SYSTEM, Diagnostic DTC:C1522/24, C1523/24, C1524/24, C1555/25

DTC Code DTC Name
C1522/24 Power Supply Sensor
C1523/24 Current Deviation Excessive
C1524/24 Motor Terminal Voltage Malfunction
C1555/25 Motor Relay Welding Failure

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1522/24 Power Supply Sensor Motor current sensor malfunction Power steering ECU assembly On Power switch on (IG) again -
C1523/24 Current Deviation Excessive Excessively large current deviation Power steering ECU assembly On Power switch on (IG) again -
C1524/24 Motor Terminal Voltage Malfunction Short (or open) in motor circuit or abnormal voltage or current in motor circuit Power steering ECU assembly On Power switch on (IG) again -
C1555/25 Motor Relay Welding Failure Motor relay circuit malfunction Power steering ECU assembly On Power switch on (IG) again -

WIRING DIAGRAM

A01MIF3E02
*a Power Steering Column Assembly
*b Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the steering column assembly has been replaced, perform rotation angle sensor value initialization and torque sensor zero point calibration.

    Click here

  • If the power steering ECU assembly has been replaced, perform assist map writing, rotation angle sensor value initialization and torque sensor zero point calibration.

    Click here

PROCEDURE


  1. READ VALUE USING GTS (MOTOR VOLTAGE)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (READY).

    4. Turn the GTS on.

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

    6. Select the item "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.


      Chassis > EMPS > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Motor Terminal Volt(U) Motor terminal voltage (A phase)

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel is being turned
      Motor Terminal Volt(V) Motor terminal voltage (B phase)

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel is being turned
      Motor Terminal Volt(W) Motor terminal voltage (C phase)

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel is being turned

      Chassis > EMPS > Data List
      Tester Display
      Motor Terminal Volt(U)
      Motor Terminal Volt(V)
      Motor Terminal Volt(W)
      Result
      Result Proceed to
      During steering operation, value changes within 4 to 35 V range A
      During steering operation, voltage is not generated B

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    B

    REPLACE STEERING COLUMN ASSEMBLY Click here