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Check Headlight System

WARNING: This page is about a different car, the 2015 Subaru Outback and 2015 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTICS PROCEDURE

Step Check Yes No
1 CHECK HEADLIGHT AND TAIL LIGHT ILLUMINATION  .
  1. Turn the ignition to ON.
  2. Set the lighting switch to the switch 1 (TAIL) and switch 2 (HEAD).
 Do the headlight and tail light illuminate? The headlight system is normal. Go to step 2  .
2 CHECK BULB  .
Check the headlight bulb.		 Is the bulb normal? Go to step 3  . Replace the headlight bulb.
3 CHECK CURRENT DATA  .
Display the data of «Lighting I Switch Input» and «Lighting II Switch Input» using Subaru Select Monitor.
NOTE: For detailed procedures, refer to "PC application help for Subaru Select Monitor".
 Does the display switch between OFF ←→ ON when the lighting switch is moved to the switch 1 (TAIL) and switch 2 (HEAD) positions? Go to step 6  . Go to step 4  .
4 CHECK COMBINATION SWITCH (LIGHT)  .
  1. Turn the ignition to OFF.
  2. Check the combination switch (light).
 Is the combination switch (light) normal? Go to step 5  . Replace the combination switch (light).
5 CHECK HARNESS  .
  1. Disconnect the connectors of body integrated unit and combination switch (light).
  2. Check the harness between body integrated unit and combination switch (light).
 Is harness normal? Check the body integrated unit and replace it if defective. <Ref. to BASIC DIAGNOSTIC PROCEDURE .> Repair or replace the harness.
6 CHECK CURRENT DATA  .
  1. Turn the ignition to ON.
  2. Display the data of «Lighting I Lamp Output » and «Lighting II Lamp Output» using Subaru Select Monitor.
 Does the display switch between OFF ←→ ON when the lighting switch is moved to the switch 1 (TAIL) and switch 2 (HEAD) positions? Check the body integrated unit and replace it if defective. <Ref. to BASIC DIAGNOSTIC PROCEDURE .> Go to step 7  .
7 CHECK HARNESS  .
  1. Turn the ignition to OFF.
  2. Check the harness between body integrated unit and headlight and between body integrated unit and tail light.
 Is harness normal? Check the body integrated unit and replace it if defective. <Ref. to BASIC DIAGNOSTIC PROCEDURE .> Repair or replace the harness.
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