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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> LAN Communication System (Diagnostics) >> CAN Communication Circuit Check >> Inspection >> Related Lines More Than 52 Ω And Less Than 62 Ω (Power Steering Control Module System)

Related Lines More Than 52 Ω And Less Than 62 Ω (Power Steering Control Module System)

Wiring diagram: 

CAN communication system Refer to WIRING SYSTEM>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

G13264912Courtesy of SUBARU OF AMERICA, INC.
G13264913Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. 
    1. Disconnect the power steering CONTROL MODULE connector.
    2. Using the tester, measure the resistance between terminals.

      Connector & terminal 

      (B450) No. 8 - (B450) No. 4:

    Is the resistance 400 Ω or more?

    Yes:  Related lines or main wiring harness between power steering CONTROL MODULE and main wiring harness is open at two places or more.

    No:  Go to  2.

  2. CHECK RELATED LINES. 

    Using the tester, measure the resistance between terminals.

    Connector & terminal 

    (B450) No. 8 - (B231) No. 2:

    (B450) No. 4 - (B231) No. 3:

    Is the resistance 10 Ω or more?

    Yes:  Repair or replace the open circuit portion of power steering CONTROL MODULE related lines.

    No:  Check DTC of power steering CONTROL MODULE. Refer to POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .