POWER STEERING SYSTEM, Diagnostic DTC:C1568

DTC Code DTC Name
C1568 DC-DC Converter Malfunction

DESCRIPTION

As a fail-safe function, when the power steering converter assembly is malfunctioning, power assistance is stopped or limited.

DTC No. DTC Detection Condition Trouble Area
C1568 Power steering converter malfunction Power steering converter assembly

WIRING DIAGRAM

A01GLJYE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK POWER STEERING ECU (PIG TERMINAL)


    1. A01GJQAE31

      Disconnect the A44 ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A44-4 (PIG) - Body ground Engine switch on (IG) 30 to 48 V

      Note

      If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    OK

    REPLACE POWER STEERING ECU Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY AND ECU)


    1. A01GKOTE01

      Disconnect the A47 converter connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      A47-1 (PIG) - Body ground Always 11 to 14 V
    3. A01GKKME01

      Disconnect the A44 ECU connector.

    4. Disconnect the A46 converter connector.

    5. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      A44-4 (PIG) - A46-4 (VOT1) Always Below 1 Ω
      A44-5 (PGND) - Body ground Always Below 1 Ω
      A44-4 (PIG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY)


    1. A01GJQAE32

      Disconnect the A46 converter connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A46-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK DTC


    1. Check for DTCs Click here.

      Result
      DTC Condition Proceed to
      Only DTC C1568 is output A
      DTC other than DTC C1568 is output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here