POWER STEERING SYSTEM, Diagnostic DTC:C1553

DTC Code DTC Name
C1553 PIG Power Supply Overvoltage

DESCRIPTION

If the power steering ECU assembly determines that the motor power source voltage and the IG voltage are not within the specified range, it stops the power assist as a fail-safe function.

DTC No. DTC Detection Condition Trouble Area
C1553

  • PIG power source overvoltage

  • IG power source overvoltage

  • IG and PIG power source circuits

  • Power steering ECU assembly

WIRING DIAGRAM

A005LY3E02

CAUTION / NOTICE / HINT

Note


  • If the power steering ECU assembly has been replaced, perform the torque sensor zero point calibration Click here.

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IG)


    1. A005GVCE01
      Text in illustration
      *a

      Rear view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A42 and F6 power steering ECU assembly connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F6-1 (IG) - A42-2 (PGND) Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System for 1NR-FE) C
      NG (for 1NZ-FE) D

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    GO TO STOP AND START SYSTEM Click here

    D

    GO TO STOP AND START SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (PIG)


    1. A005IHNE01
      Text in illustration
      *a

      Rear view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A42 power steering ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A42-1 (PIG) - A42-2 (PGND) Always 11 to 14 V
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here