Daytime Running Light Module Check

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. Ref. to LIGHTING SYSTEM>RELAY AND FUSE>INSPECTION .

Is the relay OK?

Yes  : Go to  3 .

No  : Replace the relay.

Using the Subaru Select Monitor, read DTC of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is DTC displayed?

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

No  : Go to  4 .

Display the following items using Subaru Select Monitor. Ref. 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. Ref. 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. Ref. 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.
   CAUTION: When applying battery voltage, do not mix up the positive (+) side and the negative (-) side. Incorrect polarity connection may cause internal LED damage.

   Terminals 

   NO.

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

   Does the daytime running light illuminate?

   Yes  : Go to  7 .

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

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

   Connector and 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. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .

   No  : Repair or replace the harness.