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Home >> Subaru >> 2021 >> WRX Premium, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System >> Day Time Running Light System >> Inspection >> Daytime Running Light Module Check (Led Headlight Model)
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Daytime Running Light Module Check (Led Headlight Model)

  1. CHECK FUSE. 
    1. Turn the ignition switch to OFF.
    2. Check the fuse 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. Refer to LIGHTING SYSTEM>RELAY AND FUSE>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. Refer to BODY CONTROL SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    NOTE: For detailed operation procedures, refer to "Application help".

    Is DTC displayed?

    Yes:  Perform the diagnosis according to DTC. Refer to BODY CONTROL SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

    No:  Go to  4.

  4. CHECK BODY INTEGRATED UNIT. 

    Display the data of «Daytime Running Light(DRL) Setting for North America» using Subaru Select Monitor.

    Is the setting «Alternate DRL System»?

    Yes:  Go to  5.

    No:  Set the setting to «Alternate DRL System».

  5. CHECK CURRENT DATA. 

    Display the following items using Subaru Select Monitor.

    • «Parking Brake Switch Input»
    • «EPB Operating status* (model with EPB)
    • «Shift position*
    • «Lighting II Switch Input»

    Is the input signal normal?

    Yes:  Go to  6.

    No:  Check the defective part.

  6. 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) Output» using Subaru Select Monitor.

    Does the display of «Daytime Running Light(Alternate System) Output» switch «OFF>><->«ON>> when switching the lighting switch from OFF position to II (HEAD) position?

    Yes:  Go to  7.

    No:  Replace the body integrated unit.

  7. CHECK DAYTIME RUNNING LIGHT ILLUMINATION. 
    1. Disconnect the headlight connector (gray).
    2. Apply battery voltage on the headlight unit DRL terminal input.

      Terminals 

      No. 7 (+) - No. 9 (-):

    Does the daytime running light illuminate?

    Yes:  Go to  8.

    No:  Replace the headlight. Refer to LIGHTING SYSTEM>HEADLIGHT ASSEMBLY .

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

    Is harness normal?

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

    No:  Repair or replace the harness.

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