LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2013 >> Outback Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Immobilizer System (Diagnostics)) >> Basic Diagnostic Procedure >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Basic Diagnostic Procedure: Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Step Check Yes No
1 CHECK SECURITY INDICATOR LIGHT. 
  1. Turn the ignition switch to "OFF" or "ACC".
  2. Wait at least 60 seconds.
Does the security indicator light blink? Go to step . Check the security indicator light circuit.< Refer to CHECK SECURITY INDICATOR LIGHT CIRCUIT , INSPECTION, Diagnostics Chart for Security Indicator Light. >
2 CHECK KEY SWITCH. 
Remove the key from ignition switch.
Does the security indicator light begin to blink within 1 second after the key is removed? Go to step . Check the key switch circuit.< Refer to CHECK KEY SWITCH CIRCUIT , INSPECTION, Diagnostics Chart for Security Indicator Light. >
3 CHECK SECURITY INDICATOR LIGHT. 
Turn the ignition switch to ON.
Does the security indicator light go off? Go to step . Go to step .
4 CHECK ENGINE START. 
Turn the ignition switch to START.
Does the starter operate? Check the LAN communication system.< Refer to BASIC DIAGNOSTIC PROCEDURE . > Go to step .
5 CHECK ENGINE START. 
Turn the ignition switch to START.
Does the starter operate? Go to step . Check the LAN communication system.< Refer to BASIC DIAGNOSTIC PROCEDURE . >
6 CHECK ENGINE START. 
Turn the ignition switch to START.
Does the engine start? Immobilizer system is normal. Go to step .
7 CHECK DTC. 
  1. Turn the ignition switch to OFF.
  2. Connect the Subaru Select Monitor to data link connector.< Refer to SUBARU SELECT MONITOR . >
  3. Turn the ignition switch and Subaru Select Monitor switch to ON.
  4. Read the DTC of the body integrated unit.
Is the DTC displayed on screen? Go to step 10  . Replace the body integrated unit< Refer to BODY INTEGRATED UNIT . > Register all ignition keys (transponders). Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".
8 CHECK DTC. 
  1. Turn the ignition switch to OFF.
  2. Connect the Subaru Select Monitor to data link connector.< Refer to SUBARU SELECT MONITOR . >
  3. Turn the ignition switch and Subaru Select Monitor switch to ON.
  4. Read the DTC of the ECM.
Is the DTC displayed on screen? Go to step . Perform the diagnosis for engine system.< Refer to PROCEDURE , Diagnostics for Engine Starting Failure. >< Refer to PROCEDURE , Diagnostics for Engine Starting Failure. >
9 CHECK FREEZE FRAME DATA. 
Using the Subaru Select Monitor, check the Freeze Frame Data.
Was the Freeze Frame Data recorded? Record the data. Go to step 10  . Go to step 10  .
10 PERFORM DIAGNOSIS. 
  1. Inspect using the "Diagnostic Procedure with Diagnostic Trouble Code (DTC)".< Refer to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . >
  2. Repair the trouble cause.
  3. Perform the Clear Memory Mode.
  4. Read DTCs again.
Is the DTC displayed on screen? Inspect using the "Diagnostic Procedure with Diagnostic Trouble Code (DTC)".< Refer to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . > Finish the diagnosis.