SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTEXTERIOR LIGHTSLIGHTING SYSTEM (SERVICE INFORMATION)HEADLIGHT SYSTEMINSPECTIONCHECK HEADLIGHT SYSTEM
2016 Subaru Legacy 2.5i

Check Headlight System

2016 Subaru Legacy 2.5iSECTION Check Headlight System
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK HEADLIGHT AND TAIL LIGHT ILLUMINATION. 
  1. Turn the ignition switch to ON.
  2. Set the lighting switch to the switch 1 (PARKING) 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 "Application help".
 Does the display switch between OFF ←→ ON when the lighting switch is moved to the switch 1 (PARKING) and switch 2 (HEAD) positions? Go to step 6  . Go to step 4  .
4 CHECK COMBINATION SWITCH (LIGHT). 
  1. Turn the ignition switch 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 switch 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 (PARKING) 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 switch 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.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.