Subaru Crosstrek Service Manual: Basic diagnostic procedure Procedure

1. MODEL WITHOUT KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM

CAUTION:

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.

Confirm the number of registered immobilizer key. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the number of registration 0?

Register the immobilizer system.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 2.

2.CHECK SECURITY INDICATOR LIGHT.

1) Remove the ignition key from ignition switch.

2) Wait at least 60 seconds.

Does the security indicator light blink?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 3.

Check the security indicator light circuit. Diagnostics Chart for Security Indicator Light > INSPECTION">

3.CHECK KEY SWITCH.

Insert the ignition key in the ignition switch. (OFF or ACC)

Does the security indicator light remain blinking?

Check the key switch circuit. Diagnostics Chart for Security Indicator Light > INSPECTION">

Basic Diagnostic Procedure > PROCEDURE">Go to Step 4.

4.CHECK SECURITY INDICATOR LIGHT.

Check the security indicator light status in the condition of step 3.

Does the security indicator light go off?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 7.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 5.

5.CHECK SECURITY INDICATOR LIGHT.

Turn the ignition switch to ON.

Does the security indicator light go off?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 7.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 6.

6.CHECK ENGINE START.

Turn the ignition switch to START.

Does the starter operate?

Check the LAN communication system. Basic Diagnostic Procedure">

Basic Diagnostic Procedure > PROCEDURE">Go to Step 8.

7.CHECK ENGINE START.

Turn the ignition switch to START.

Does the engine start?

Immobilizer system is normal.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 9.

8.CHECK DTC.

Read the DTC of body integrated unit and ECM and time stamp using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

NOTE:

For time stamp, refer to “LAN SYSTEM”. General Description > CAUTION">

Is the DTC displayed on screen?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 10.

Replace the body integrated unit. Body Integrated Unit">

9.CHECK DTC.

Read the DTC of body integrated unit and ECM and time stamp using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

NOTE:

For time stamp, refer to “LAN SYSTEM”. General Description > CAUTION">

Is the DTC displayed on screen?

Basic Diagnostic Procedure > PROCEDURE">Go to Step 10.

Perform the diagnosis for engine system. Diagnostics for Engine Starting Failure > PROCEDURE">

10.CHECK FREEZE FRAME DATA.

Using the Subaru Select Monitor, check the Freeze Frame Data.

Are the data recorded?

Record the data. Basic Diagnostic Procedure > PROCEDURE">Go to Step 11.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 11.

11.CHECK DTC.

Check the displayed DTC.

Are DTCs irrelevant to the immobilizer displayed?

Perform the diagnosis according to DTCs irrelevant to the immobilizer first.

Basic Diagnostic Procedure > PROCEDURE">Go to Step 12.

12.PERFORM DIAGNOSIS.

1) Inspect using the “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”. Diagnostic Procedure with Diagnostic Trouble Code (DTC)">

2) Repair the trouble cause.

3) Perform the Clear Memory Mode. Clear Memory Mode">

4) Read DTCs again. Read Diagnostic Trouble Code (DTC)">

Is the DTC displayed on screen?

Inspect using the “Diagnostic Procedure with Diagnostic Trouble Code (DTC)”. Diagnostic Procedure with Diagnostic Trouble Code (DTC)">

Finish the diagnosis.

For immobilizer diagnosis of model with the keyless access with push button start system, refer to “Keyless Access with Push Button Start System”. Basic Diagnostic Procedure">

Preparation tool

Clear memory mode Operation

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