Day Time Running Light System: Inspection

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.

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.

Read the DTC of body integrated unit using Subaru Select Monitor. Refer to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC displayed?

Yes  : Perform the diagnosis according to the DTC. Refer to BODY CONTROL (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>OPERATION .

No  : Go to  4.

Display the following items using Subaru Select Monitor. Refer to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

• [EPB operating status]
• [Shift Position]
• [Lighting II Switch Input]
• [P SW]
• [Power Supply Voltage]

Is the input signal normal?

Yes  : Go to  5.

No  : Check the defective part.

1. Start the engine.
2. Release the parking brake and place the shift position to other than "P" range.
3. Display the [Daytime Running Light(Alternate System) Output] data using Subaru Select Monitor. Refer to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

Does the display of [Daytime Running Light(Alternate System) 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. Refer to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .

1. Disconnect the headlight connector.
2. Apply battery voltage to the DRL terminal input of the headlight unit.

   Terminals 

   NO. 3 (+) - NO. 15 (-):

Does the daytime running light illuminate?

Yes  : Go to  7.

No  : Replace the headlight. Refer to LIGHTING SYSTEM>Headlight Assembly .

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

   Connector & terminal 

   (B121) No. 3 - Daytime running light relay No. 3:

   (B122) No. 3 - Daytime running light relay No. 3:

   (B72) No. 5 - Daytime running light relay No. 4:

Is harness normal?

Yes  : Replace the body integrated unit. Refer to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .

No  : Repair or replace the harness.