POWER STEERING SYSTEM, Diagnostic DTC:C1552

DTC Code DTC Name
C1552 PIG Power Supply Voltage Malfunction

DESCRIPTION

When 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

  • PIG power source circuit

  • Power steering ECU

WIRING DIAGRAM

A01CAZTE08

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.

PROCEDURE


  1. INSPECT FUSE (EPS)


    1. Remove the EPS fuse from the engine room No. 1 relay block.

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

      Standard Resistance
      Fuse Condition Specified Condition
      EPS Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

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


    1. A01CB3TE13

      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
      A20-1 (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
      A20-2 (PGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER STEERING ECU Click here