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DTC B1571: Reference Code Incompatibility: DTC Detecting Condition

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.

Reference code incompatibility between body integrated unit and ECM

CAUTION: When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".
DTC 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".		 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".		 Is registration complete? Finish the diagnosis. Go to step 4  .
3 PERFORM ECM REGISTRATION. 
Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".		 Is registration complete? Finish the diagnosis. Go to step 4  .
4 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Perform the diagnosis according to DTC. Go to step 5  .
5 PERFORM ECM REGISTRATION. 
  1. Replace the ECM.
  2. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".
 Is registration complete? Finish the diagnosis. Replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >
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