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52 Ω Or Less

G13203243Courtesy of SUBARU OF AMERICA, INC.
G13203244Courtesy of SUBARU OF AMERICA, INC.
NOTE: When the bus line is measured, combined resistance of the end resistance (120 Ω) in ECM and the end resistance (120 Ω) in body integrated unit can be measured. The combined resistance is more than 52 Ω and less than 62 Ω with the stabilizing circuit included. When the measured resistance value is 52 Ω or less, main wiring harness or related lines may be shorted, or combined resistance may have changed because resistance other than end resistance is created on the circuit.
  1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. 
    1. Turn the ignition switch to OFF.
    2. Disconnect the steering sensor connector.
    3. Using a tester, measure the resistance between the steering sensor connector and chassis ground.

      Connector and terminal 

      (i74) No. 2 - (i74) No. 3:

    Is the resistance less than 10 Ω?

    Yes  : Go to  2.

    No  : Go to  3.

  2. CHECK MAIN WIRING HARNESS AND RELATED LINES. 

    With a tester connected, disconnect control module connectors in order.

    NOTE: Disconnect the body integrated unit at the end.

    Connector and terminal 

    (i74) No. 2 - (i74) No. 3:

    Is there any control module whose condition has changed from short state?

    Yes  : Replace the control module whose resistance has changed. When the value changed at disconnecting the body integrated unit, replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT>REMOVAL . Go to  3.

    No  : Repair or replace the shorted part of harness between body integrated unit and ECM.

  3. CHECK CONTROL MODULE. 
    1. Disconnect the connectors of ECM and body integrated unit.
    2. Using a tester, measure the resistance between control module terminals.

      Connector and terminal 

      (B134) No. 45 - (B134) No. 58:

      (i171) No. 1 - (i171) No. 2:

    Is the resistance 114 - 126 Ω?

    Yes  : Go to  4.

    No  : Replace the control module whose end resistance value is out of the specified range.

  4. CHECK HARNESS. 

    Measure the resistance between body integrated unit connector terminals using tester.

    Connector and terminal 

    (i171) No. 1 - (i171) No. 2:

    Is the resistance 1 MΩ or more?

    Yes  : CAN communication circuit is normal.

    No  : Go to  5.

  5. CHECK CONTROL MODULE. 

    With a tester connected, disconnect control modules in order.

    Connector and terminal 

    (i171) No. 1 - (i171) No. 2:

    Are there any control modules whose resistance changed to 1 MΩ or more?

    Yes  : Replace the control module that has changed.

    No  : Repair or replace the harness part which has resistance component.

G13203246Courtesy of SUBARU OF AMERICA, INC.
NOTE: When the bus line is measured, combined resistance of the end resistance (120 Ω) in body integrated unit and the end resistance (120 Ω) in combination meter can be measured. The combined resistance is more than 52 Ω and less than 62 Ω with the stabilizing circuit included. When the measured resistance value is 52 Ω or less, main wiring harness or related lines may be shorted, or combined resistance may have changed because resistance other than end resistance is created on the circuit.
  1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. 
    1. Turn the ignition switch to OFF.
    2. Disconnect the audio or navigation unit connector.
    3. Using a tester, measure the resistance between audio or navigation unit connector terminals.

      Connector and terminal 

      (i87) No. 9 - (i87) No. 10:

    Is the resistance less than 10 Ω?

    Yes  : Go to  2.

    No  : Go to  3.

  2. CHECK MAIN WIRING HARNESS AND RELATED LINES. 

    With a tester connected, disconnect control module connectors in order.

    NOTE: Disconnect the body integrated unit at the end.

    Connector and terminal 

    (i87) No. 9 - (i87) No. 10:

    Is there any control module whose condition has changed from short state?

    Yes  : Replace the control module whose resistance has changed. When the value changed at disconnecting the body integrated unit, replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT>REMOVAL . Go to  3.

    No  : Repair or replace the shorted part of harness between body integrated unit and combination meter.

  3. CHECK CONTROL MODULE. 
    1. Disconnect the connectors of the body integrated unit and combination meter.
    2. Using a tester, measure the resistance between control module terminals.

      Connector and terminal 

      (B281) No. 17 - (B281) No. 19:

      (i10) No. 6 - (i10) No. 7:

    Is the resistance 114 - 126 Ω?

    Yes  : Go to  4.

    No  : Replace the control module whose end resistance value is out of the specified range.

  4. CHECK HARNESS. 

    Using a tester, measure the resistance between the combination meter connector terminals.

    Connector and terminal 

    (i10) No. 6 - (i10) No. 7:

    Is the resistance 1 MΩ or more?

    Yes  : CAN communication circuit is normal.

    No  : Go to  5.

  5. CHECK CONTROL MODULE. 

    With a tester connected, disconnect control modules in order.

    Connector and terminal 

    (i10) No. 6 - (i10) No. 7:

    Are there any control modules whose resistance changed to 1 MΩ or more?

    Yes  : Replace the control module that has changed.

    No  : Repair or replace the harness part which has resistance component.

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