Subaru Legacy BN/BS (2015-2019) Service Manual: Basic diagnostic procedure procedure

Subaru Legacy BN/BS (2015-2019) Service Manual / Keyless access with push button start system (diagnostics) / Basic diagnostic procedure procedure

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” provided as a separate volume.

NOTE:

• Using the Function Setting (Customize), check that the keyless access system is not in a cancelled state. Function Setting (Customize) > OPERATION

• Check List for Interview Check List for Interview

STEP	CHECK	YES	NO
1.CHECK BATTERY. Using a tester, measure the battery voltage.	Is the voltage 11 V or more-	Basic Diagnostic Procedure > PROCEDURE	Charge or replace the battery and perform check pre-inspection. Basic Diagnostic Procedure > PROCEDURE
2.CHECK PRE-INSPECTION. Use the interview check list to interview the user. Check List for Interview	Was the symptoms of the trouble recorded in the interview-	Basic Diagnostic Procedure > PROCEDURE	Interview the user again.
3.BASIC INSPECTION. Perform the inspection for LAN system. Basic Diagnostic Procedure > PROCEDURE	Is LAN system normal-	Basic Diagnostic Procedure > PROCEDURE	Check it according to DTC of LAN system. Basic Diagnostic Procedure > PROCEDURE
4.CHECK TROUBLE SYMPTOM. 1) Read diagnostic trouble code (DTC) for the «keyless access with push button start». Read Diagnostic Trouble Code (DTC) NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. Subaru Select Monitor > INSPECTION 2) Record all DTCs, time stamp and freeze frame data. NOTE: For time stamp, refer to “LAN SYSTEM”. General Description > CAUTION	Is DTC displayed on Subaru Select Monitor-	Perform diagnosis according to the DTC. After diagnosis, Basic Diagnostic Procedure > PROCEDURE	Basic Diagnostic Procedure > PROCEDURE
5.CHECK PHENOMENON LIST. Check the “Phenomenon List”. General Diagnostic Table	Is there a symptom that corresponds in the phenomenon list-	Perform diagnosis according to the procedures in the phenomenon list.	Basic Diagnostic Procedure > PROCEDURE
6.CHECK TROUBLE PHENOMENON. 1) Perform check of current data. Read Current Data 2) Perform a function check. 3) Perform a unit check.	Was the trouble cause found-	Repair the cause of trouble.	Repeat a basic check again.
7.PERFORM DIAGNOSIS. 1) Perform the Clear Memory Mode. Clear Memory Mode 2) Perform the Inspection Mode. Inspection Mode	Is DTC displayed on Subaru Select Monitor-	Perform diagnosis according to the DTC.	Finish the diagnosis.

Keyless access with push button start system (diagnostics)

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Check list for interview check

Inspect the following items regarding the vehicle’s state.Keyless Access with Push Button Start System Trouble Check List for Interview Received Year Month DateCustomer&rsquo ...

Other materials:

Caution
1. Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay.CAUTION:• Do not use electrical test equipment on the airbag system circuits.• Be careful not to damage the airbag system wiring harness when servicing the ECM, TCM, main relay and fuel pump relay.2. N ...