Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2014IMPREZA SPORT LIMITEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTEXTERIOR LIGHTSAUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS)BASIC DIAGNOSTIC PROCEDUREPROCEDURE

2014 Subaru Impreza Sport Limited

Basic Diagnostic Procedure: Procedure

2014 Subaru Impreza Sport LimitedSECTION Procedure

Step	Check	Yes	No
1 PERFORM CUSTOMER INTERVIEW. Using the Check List for Interview, ask the customer the condition of how the trouble occurred. < Ref. to CHECK , Check List for Interview.>	Did you interview the customer?	Go to step 2 .	Interview the customer. < Ref. to CHECK , Check List for Interview.>
2 CHECK LAN SYSTEM. Inspect LAN system. < Ref. to PROCEDURE , Basic Diagnostic Procedure.> < Ref. to PROCEDURE , Basic Diagnostic Procedure.>	Is there any fault?	Perform the inspection according to the diagnosis for LAN system.	Go to step 3 .
3 CHECK AUTO HEADLIGHT BEAM LEVELER SYSTEM. Using the Subaru Select Monitor, read DTC of the auto headlight beam leveler system inspection. < Ref. to OPERATION , Read Diagnostic Trouble Code (DTC).> NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. < Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , INSPECTION, Subaru Select Monitor.>	Is DTC displayed?	Record DTC and time stamp, and perform the diagnosis according to DTC. < Ref. to LIST , List of Diagnostic Trouble Code (DTC).> For time stamp, refer to "LAN SYSTEM". < Ref. to TIME STAMP , CAUTION, General Description.> < Ref. to TIME STAMP , CAUTION, General Description.>	Go to step 4 .
4 CHECK DIAGNOSTICS WITH PHENOMENON. Check "Diagnostics with Phenomenon". < Ref. to DIAGNOSTICS WITH PHENOMENON .>	Does the symptom apply?	Perform diagnosis according to the procedures in the diagnostics with phenomenon.	Go to step 5 .
5 CHECK TROUBLE PHENOMENON. Perform the basic inspection and function check. < Ref. to INSPECTION , General Description.> Check the auto headlight beam leveler CM. < Ref. to CONTROL MODULE I/O SIGNAL .> Perform check of current data. < Ref. to READ CURRENT DATA .> Perform a unit check.	Was the trouble cause found?	Repair or replace the cause of trouble.	System is normal.

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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.