Subaru Crosstrek Service Manual: Dtc b1571 reference code incompatibility (immobilizer cm 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.

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?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">Go to Step 2.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">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.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">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.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">Go to Step 4.

4.CHECK FOR ANY OTHER DTC ON DISPLAY.

1) Perform the Clear Memory Mode. Clear Memory Mode">

2) Read the DTC of the ECM. Read Diagnostic Trouble Code (DTC)">

Is any other DTC displayed?

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">Go to Step 5.

5.PERFORM ECM REGISTRATION.

1) Replace the ECM. Engine Control Module (ECM)">

2) 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. Body Integrated Unit">

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