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.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1553

PIG Power Supply Overvoltage

  • PIG power source overvoltage

  • IG power source overvoltage

  • IG and PIG power source circuits

  • Power steering ECU assembly

EPS warning light: Comes on

After normal confirmation

-

WIRING DIAGRAM

C302890E01

CAUTION / NOTICE / HINT

Note:

  • If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

    Click here

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

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (IG, PIG)

    1. Disconnect the E5 and E6 power steering ECU assembly connectors.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E5-1 (IG) - E6-2 (PGND)

      Ignition switch ON

      8 to 16 V

      E6-1 (PIG) - E6-2 (PGND)

      Always

      9 to 16 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE POWER STEERING ECU ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR