Except For C0 And C5 Models: Trouble Symptom

WARNING: This page is about a different car, the 2016 Subaru Outback and 2016 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Engine will not start.
The security indicator illuminates.
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.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY. Confirm the number of registered immobilizer key. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.	Is the number of registration 0?	Go to step 2 .	Go to step 3 .
2 PERFORM IMMOBILIZER SYSTEM REGISTRATION. Register the immobilizer system. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.	Is registration complete?	Finish the diagnosis.	Go to step 3 .
3 PERFORM ECM REGISTRATION. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.	Is registration complete?	Finish the diagnosis.	Go to step 4 .
4 CHECK DTC. Perform the Clear Memory Mode. < Ref. to CLEAR MEMORY MODE . > Read the DTC of the ECM. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is DTC other than DTC B1571 displayed?	Perform the diagnosis according to DTC.	Go to step 5 .
5 PERFORM ECM REGISTRATION. Replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . > < Ref. to ENGINE CONTROL MODULE (ECM) . > Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.	Is registration complete?	Finish the diagnosis.	Refer to "Correspondence table when registration is not possible" in the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume. If the registration still does not work properly, replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >