POWER STEERING SYSTEM, Diagnostic DTC:C1551/25

DTC Code DTC Name
C1551/25 IG Power Supply Voltage Malfunction

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1551/25 The IG power supply circuit has an open or short circuit.

  • EPS-IG fuse

  • Harness or connector

  • Power steering ECU assembly

WIRING DIAGRAM

A01FFXRE01

INSPECTION PROCEDURE

Note


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

  • If the power steering ECU assembly is replaced with a new one, perform assist map writing, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. Check the connection of the power steering ECU connector.

    2. Visually inspect the terminals of the power steering ECU connector.

      Result
      Result Proceed to
      Normal A
      Connectors not properly connected B
      Power steering ECU connector terminals abnormal C

    B

    CONNECT CONNECTORS CORRECTLY

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - GROUND)


    1. Disconnect the power steering ECU connector.

    2. A01FGZ2E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Steering ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A29-14 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A29-9 (PGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here