Basic Diagnostic Procedure: Procedure

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek and 2015 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Subaru Select Monitor kit is required for reading DTC, performing diagnosis and reading current data.
Before removal or installation, be sure to remove any foreign matter (dust, moisture, oil, etc.).
Registration of immobilizer may be needed after the replacement of control modules, etc. For detailed procedure, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".

NOTE:

Using the Function Setting (Customize), check that the keyless access system is not in a cancelled state. < Ref. to OPERATION , Function Setting (Customize) . >
Check List for Interview < Ref. to CHECK LIST FOR INTERVIEW . >

Step	Check	Yes	No
1 CHECK BATTERY . Using a tester, measure the voltage for 12 volt auxiliary battery.	Is the voltage 11 V or more?	Go to step 2 .	Charge or replace the battery and perform check pre-inspection. Go to step 2 .
2 CHECK PRE-INSPECTION . Use the interview check list to interview the user. < Ref. to CHECK LIST FOR INTERVIEW . >	Was the symptoms of the trouble recorded in the interview?	Go to step 3 .	Interview the user again.
3 BASIC INSPECTION . Perform the inspection for LAN system. < Ref. to PROCEDURE , Basic Diagnostic Procedure (Except Hybrid) . > < Ref. to PROCEDURE , Basic Diagnostic Procedure (Hybrid) . >	Is LAN system normal?	Go to step 4 .	Perform the inspection according to the diagnosis for LAN system. < Ref. to PROCEDURE , Basic Diagnostic Procedure (Except Hybrid) . > < Ref. to PROCEDURE , Basic Diagnostic Procedure (Hybrid) . >
4 CHECK TROUBLE SYMPTOM . Read diagnostic trouble code (DTC) for the keyless access system. < 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 , Subaru Select Monitor. > Record all DTCs, time stamp and freeze frame data. NOTE: For time stamp, refer to "LAN SYSTEM". < Ref. to TIME STAMP . >	Is DTC displayed on Subaru Select Monitor?	Perform diagnosis according to the DTC.	Go to step 5 .
5 CHECK PHENOMENON LIST . Check the "Phenomenon List". < Ref. to GENERAL DIAGNOSTIC TABLE . >	Is there a symptom that corresponds in the phenomenon list?	Perform diagnosis according to the procedures in the phenomenon list.	Go to step 6 .
6 CHECK TROUBLE PHENOMENON . Perform check of current data. Perform a function check. Perform a unit check.	Was the trouble cause found?	Repair the cause of trouble.	Repeat a basic check again.