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Check Security Indicator Light Circuit

CAUTION: When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

Wiring diagram: 

Immobilizer system Ref. to WIRING SYSTEM>IMMOBILIZER SYSTEM>WIRING DIAGRAM .

G11583226Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK FUSE. 
    1. Remove the ignition key from ignition switch. Or, turn off the power.
    2. Check the fuse (M/B No. 8).

    Is the check result OK?

    Yes:  Go to  2.

    No:  Replace the fuse. If the replaced fuse blows out easily, repair the short circuit in the harness between the fuse and body integrated unit.

  2. CHECK SECURITY INDICATOR LIGHT. 
    1. Disconnect the connector from body integrated unit.
    2. Connect the resistor (100 Ω) between the body integrated unit connector terminal (i171) No. 26 and chassis ground.

    Does the security indicator light illuminate?

    Yes:  Go to  3.

    No:  Go to  5.

  3. CHECK BODY INTEGRATED UNIT GROUND CIRCUIT (OPEN CIRCUIT). 

    Measure the resistance between the body integrated unit connector terminal and chassis ground.

    Connector & terminal 

    (B280) No. 1 - Chassis ground:

    (i84) No. 1 - Chassis ground:

    Is the resistance less than 10 Ω?

    Yes:  Go to  4.

    No:  Repair the open circuit of the body integrated unit ground circuit.

  4. CHECK BODY INTEGRATED UNIT POWER SUPPLY CIRCUIT. 

    Measure the voltage between the body integrated unit connector terminal and chassis ground.

    Connector & terminal 

    (B281) No. 7 (+) - Chassis ground (-):

    (i84) No. 6 (+) - Chassis ground (-):

    Is the voltage 10 V or more?

    Yes:  Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .

    No:  Check the harness for open or short circuit between body integrated unit and fuse.

  5. CHECK COMBINATION METER CIRCUIT. 
    1. Remove the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .
    2. Measure the voltage between combination meter connector terminal and chassis ground.

      Connector & terminal 

      (i10) No. 40 (+) - Chassis ground (-):

    Is the voltage 10 V or more?

    Yes:  Go to  6.

    No:  Check for an open or short circuit in the harness between the combination meter and fuse.

  6. CHECK COMBINATION METER CIRCUIT (OPEN). 

    Measure the resistance between the body integrated unit connector terminal and combination meter connector terminal.

    Connector & terminal 

    (i171) No. 26 - (i10) No. 1:

    Is the resistance less than 10 Ω?

    Yes:  LED bulb is defective. Replace the combination meter case assembly. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER>DISASSEMBLY .

    No:  Repair the harness or connector.

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