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 Circuit Malfunction
C1555/25 Motor Relay Welding Failure

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
C1522/24 Motor current sensor malfunction

  • Power steering motor (built into steering column assembly)

  • Power steering ECU assembly
C1523/24 Excessively large current deviation
C1524/24 Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1555/25 Motor relay circuit malfunction

WIRING DIAGRAM

A005BPOE17
*a Power Steering Motor (built into Steering Column Assembly)
*b Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the power steering ECU assembly has been replaced with a new one, perform assist map writing and rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Click here.

  • If the steering column assembly has been replaced with a new one, perform rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Click here.

PROCEDURE


  1. READ VALUE USING GTS


    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 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.: 0.000 V

      Max.: 98.000 V

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

      Motor terminal voltage (V phase)/

      Min.: 0.000 V

      Max.: 98.000 V

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

      Motor terminal voltage (W phase)/

      Min.: 0.000 V

      Max.: 98.000 V

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