Daytime Running Light System Check

WARNING: This page is about a different car, the 2016 Subaru Impreza and 2016 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK FUSE. Turn the ignition switch to OFF. Check the headlight HI fuse.	Is the fuse OK?	Go to step 2.	Replace the fuse.
2 CHECK RELAY. Check the daytime running light relay and headlight HI relay.	Is the relay OK?	Go to step 3.	Replace the relay.
3 CHECK BODY INTEGRATED UNIT. Read the DTC of body integrated unit using Subaru Select Monitor. NOTE: For detailed operation procedures, refer to "Application help".	Is DTC displayed?	Perform the diagnosis according to DTC.	Go to step 4.
4 CHECK CURRENT DATA. Display the following items using Subaru Select Monitor. «Parking Brake Switch Input» «Shift position» «Lighting II Switch Input»	Is the input signal normal?	Go to step 5.	Check the defective part.
5 CHECK HEADLIGHT ILLUMINATION. Turn the ignition switch to ON. Turn the lighting switch to the switch II (HEAD) position. Turn the dimmer & passing switch to the switch UP position.	Does the headlight (high beam) illuminate?	Go to step 6.	Check the combination switch (light) and headlight bulb.
6 CHECK DAYTIME RUNNING LIGHT RESISTOR. Turn the ignition switch to OFF. Check the daytime running light resistor. < Ref. to INSPECTION , Day Time Running Resistor. >	Does the daytime running light resistor normal?	Go to step 7.	Replace the daytime running light resistor.
7 CHECK HARNESS. Disconnect the connectors of body integrated unit, daytime running light relay, daytime running light resistor, and headlight. Check each harness.	Is harness normal?	Replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >	Repair or replace the harness.