POWER STEERING SYSTEM, Diagnostic DTC:C1552, C1554

DTC Code DTC Name
C1552 PIG Power Supply Voltage
C1554 Power Supply Relay Failure

DESCRIPTION

When a problem occurs in the PIG power source and power supply relay system, the fail-safe function works to stop the power assist.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1552 PIG Power Supply Voltage PIG power source circuit malfunction

  • EPS fuse

  • Harness or connector

  • Rack and pinion power steering gear assembly

 EPS warning light: Comes on Power switch on (IG) again -
C1554 Power Supply Relay Failure Power source relay circuit malfunction

  • EPS fuse

  • Harness or connector

  • Rack and pinion power steering gear assembly

 EPS warning light: Comes on Power switch on (IG) again -

WIRING DIAGRAM

B004U9DE25
*1 from Auxiliary Battery
*2 Power Steering ECU (Rack and Pinion Power Steering Gear Assembly)

CAUTION / NOTICE / HINT

Note


  • If the rack and pinion power steering gear 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 (RACK AND PINION POWER STEERING GEAR ASSEMBLY - BODY GROUND)


    1. Disconnect the B1 rack and pinion power steering gear assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B1-8 (PIG) - Body ground Always 9 to 16 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B1-7 (PGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for 2WD: Click here
    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for AWD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR