DTC B1571: Reference Code Incompatibility

DTC detecting condition: 

Reference code incompatibility between body integrated unit and ECM

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?

   Yes:  Go to  2.

   No:  Go to  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?

   Yes:  Finish the diagnosis.

   No:  Go to  4.

3. PERFORM ECM REGISTRATION. 

   Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

   Is registration complete?

   Yes:  Finish the diagnosis.

   No:  Go to  4.

4. CHECK FOR ANY OTHER DTC ON DISPLAY. 
   1. Perform the Clear Memory Mode. Ref. to IMMOBILIZER (DIAGNOSTICS)>CLEAR MEMORY MODE .
   2. Read the DTC of the ECM. Ref. to IMMOBILIZER (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

   Are DTCs other than DTC B1571 displayed?

   Yes:  Perform the diagnosis of DTCs other than B1571.

   No:  Go to  5.

5. PERFORM ECM REGISTRATION. 
   1. Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (STI)>ENGINE CONTROL MODULE (ECM) . Ref. to FUEL INJECTION (FUEL SYSTEMS) (W/O STI)>ENGINE CONTROL MODULE (ECM) .
   2. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

   Is registration complete?

   Yes:  Finish the diagnosis.

   No:  Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .