DTC B1571: Reference Code Incompatibility: Trouble Symptom

WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Engine will not start.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK ECM. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".	Is ECM registration finished? And does the engine start?	System is normal.	Go to step 2 .
2 REPLACE ECM. Install the ECM from other normal operating vehicle (with push button start) which use same ECM to the vehicle to be diagnosed. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".	Is ECM registration finished? And does the engine start?	Replace the ECM. < Ref. to REMOVAL , Engine Control Module (ECM). > Install the ECM from other vehicle to the original vehicle.	Replace the keyless access CM. < Ref. to REMOVAL , Keyless Access CM. >