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 assembly 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 assembly
C1523 Excessively large current deviation
C1524 Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1555 Motor relay circuit malfunction

WIRING DIAGRAM

A003YURE19

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (MOTOR VOLTAGE)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (READY).

    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)" and "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.: 98 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 V

      Max.: 98 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 V

      Max.: 98 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel being turned
      Result
      Condition Proceed to
      During steering operation, value changes within 4 to 35 V range A
      During steering operation, voltage is not generated B

    B

    REPLACE STEERING COLUMN ASSEMBLY Click here

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here