DTC B1571 Reference Code Incompatibility (Immobilizer Control Module To ECM): DTC Detecting Condition

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" 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 4.
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 FOR ANY OTHER DTC ON DISPLAY. Perform the Clear Memory Mode. < Ref. to CLEAR MEMORY MODE . > Read the DTC of the ECM. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >	Is any other DTC displayed?	Perform the diagnosis according to DTC.	Go to step 5.
5 PERFORM ECM REGISTRATION. Replace the 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.	Replace the body integrated unit. < Ref. to BODY INTEGRATED UNIT . >