POWER STEERING SYSTEM, Diagnostic DTC:C1552

DTC Code DTC Name
C1552 PIG Power Supply Voltage Malfunction

DESCRIPTION

If a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist.

DTC No. DTC Detection Condition Trouble Area
C1552 PIG power source circuit malfunction inside ECU

  • EPS fuse

  • PIG power source circuit

  • Power steering ECU

WIRING DIAGRAM

A019K8BE11

INSPECTION PROCEDURE

Note


  • If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (PIG POWER SUPPLY)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

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

    6. Select the item "PIG Power Supply" in the Data List and read the value displayed on the intelligent tester.

      EMPS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PIG Power Supply

      Power source voltage to active motor/

      Min.: 0 V

      Max.: 20.1531 V

      		 11 to 14 V The engine is running and power steering is operating.
      OK
      The normal condition value is displayed on the intelligent tester.

    NG

    CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND) Click here

    OK

    REPLACE POWER STEERING ECU Click here

  2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND)


    1. A019JXLE19
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Steering ECU)

      Disconnect the connector from the power steering ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F10-1 (PIG) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F10-2 (PGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER STEERING ECU Click here