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

Subaru Legacy BN/BS (2015-2019) Service Manual / Body control system (diagnostics) / Basic diagnostic procedure procedure

CAUTION:

• Subaru Select Monitor is required for reading DTC, performing diagnosis and reading current data.

• Remove foreign matter (dust, water, oil, etc.) from the body integrated unit connector during removal and installation.

• 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:

• To check harness for open or short circuits, shake the suspected trouble spot or connector.

• Check List for Interview Check List for Interview

STEP	CHECK	YES	NO
1.CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using the interview check list. Check List for Interview	Did you interview the customer-	Basic Diagnostic Procedure > PROCEDURE	Interview the customer.
2.BASIC INSPECTION. Check components which might affect body control. General Description > INSPECTION	Is the component that might influence the body control problem normal-	Basic Diagnostic Procedure > PROCEDURE	Repair or replace each component.
3.CHECK DTC. 1) Read the DTC. 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 > COMMUNICATION FOR INITIALIZING IMPOSSIBLE 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. List of Diagnostic Trouble Code (DTC) Basic Diagnostic Procedure > PROCEDURE	Basic Diagnostic Procedure > PROCEDURE
4.PERFORM GENERAL DIAGNOSTICS. Inspect using the “General Diagnostic Table”. General Diagnostic Table	Is result of inspection OK-	The body control system is normal.	Basic Diagnostic Procedure > PROCEDURE
5.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. List of Diagnostic Trouble Code (DTC)	Finish the diagnosis.

Body control system (diagnostics)

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Check list for interview check

Inspect the following items regarding the vehicle’s state.Body Control System Check List for Interview Date of Vehicle Bring-in Year Month ...

Other materials:

Preparation tool
1. SPECIAL TOOLILLUSTRATIONTOOL NUMBERDESCRIPTIONREMARKS34099PA100SPANNERUsed when measuring the rotational resistance of gearbox assembly.34199AJ040SPECIAL TOOL EPS• Used for adjusting the backlash of gearbox. (Adjusting screw side)• Used together with SPECIAL TOOL EPS (34199AJ030 ...