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Check Daytime Running Light System (Halogen Headlight Model)

  1. CHECK FUSE  .
    1. Turn the ignition switch to OFF.
    2. Check the fuse on the upstream of the daytime running light relay.

      Is the fuse OK?

      Yes  Go to  2.

      No  Replace the fuse.

  2. CHECK RELAY. 

    Check the daytime running light relay. Ref. to INSPECTION .

    Is the relay OK?

    Yes  Go to  3.

    No  Replace the relay.

  3. CHECK BODY INTEGRATED UNIT. 

    Read the DTC of body integrated unit using Subaru Select Monitor. Ref. to OPERATION .

    Is DTC displayed?

    Yes  : Perform the diagnosis according to DTC. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .

    No  : Go to  4.

  4. CHECK CURRENT DATA. 

    Display the following items using Subaru Select Monitor. Ref. to OPERATION .

    • [Parking Brake Switch Input]
    • [Shift Position]
    • [Lighting II Switch Input]

    Is the input signal normal?

    Yes  : Go to  5.

    No  : Check the defective part.

  5. CHECK CURRENT DATA. 
    1. Start the engine.
    2. Release the parking brake and place the shift position to other than "P" range.
    3. Display the data of [Daytime Running Light Alternate System (R)Output] and [Daytime Running Light Alternate System (L)Output] using Subaru Select Monitor. Ref. to DATA MONITOR .

      4. Do the displays of [Daytime Running Light Alternate System (R)Output] and [Daytime Running Light Alternate System (L)Output] switch between [OFF] ?? [ON] when the lighting switch is switched from the OFF position to the II (HEAD) position?

      Yes  Go to  6.

      No  Replace the body integrated unit. Ref. to BODY INTEGRATED UNIT .

  6. CHECK DAYTIME RUNNING LIGHT ILLUMINATION. 
    1. Disconnect the headlight connector.
    2. Apply battery voltage to the DRL terminal input of the headlight unit.

      Terminals 

      NO. 4 (+) - NO. 3 (-):

      Does the daytime running light illuminate?

      Yes  Go to  7.

      No  Replace the headlight. Ref. to Headlight Assembly .

  7. CHECK HARNESS. 
    1. Disconnect the connectors of body integrated unit, daytime running light relay and headlight.
    2. Check each harness.

      Connector and terminal. 

      (B287) No. 5 - (B225) No. 14:

      (B583) No. 3 - (B225) No. 18:

      (B487) No. 4 - (B225) No. 17:

      (B477) No. 4 - (B225) No. 21:

    Is harness normal?

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

    No  : Repair or replace the harness.

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