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Subaru Legacy Service Manual: Basic diagnostic procedure procedure

Subaru Legacy Service Manual / Body control system (diagnostics) / Basic diagnostic procedure procedure


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.


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

Check List for Interview Check List for Interview



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.


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.


1) Read the DTC. Read Diagnostic Trouble Code (DTC)


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.


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


Inspect using the “General Diagnostic Table”. General Diagnostic Table

Is result of inspection OK-

The body control system is normal.

Basic Diagnostic Procedure > PROCEDURE


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)

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:

1. Remove the bumper face - front. Front Bumper > REMOVALNOTE:Remove the bumper face - front only at the first adjustment.2. Remove the center ring clip from the lock assembly - front hood.NOTE:Remove the center ring clip only at the first adjustment.After adjusting the lock assembly - front hood, ...

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