Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b1571 reference code incompatibility (immobilizer cm to ecm)

1. EXCEPT FOR C0 AND C5 MODELS

DIAGNOSIS START CONDITION:

Battery voltage is 10 V or more.

The remote engine starter was not used to start the engine.

DTC DETECTING CONDITION:

Reference code incompatibility between body integrated unit and ECM

TROUBLE SYMPTOM:

Engine will not start.

The security indicator illuminates.

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.

STEPCHECKYESNO

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)

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

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)

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)

4.CHECK DTC.

1) Perform the Clear Memory Mode. Clear Memory Mode

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

Is DTC other than DTC B1571 displayed-

Perform the diagnosis according to DTC.

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

5.PERFORM ECM REGISTRATION.

1) Replace the ECM. Engine Control Module (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.

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the body integrated unit. Body Integrated Unit

2. FOR C0 AND C5 MODELS

DIAGNOSIS START CONDITION:

Battery voltage is 10 V or more.

The remote engine starter was not used to start the engine.

DTC DETECTING CONDITION:

Reference code incompatibility between immobilizer CM and ECM

TROUBLE SYMPTOM:

Engine will not start.

The security indicator illuminates.

CAUTION:

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

STEPCHECKYESNO

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)

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

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)

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)

4.CHECK DTC.

1) Perform the Clear Memory Mode. Clear Memory Mode

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

Is DTC other than DTC B1571 displayed-

Perform the diagnosis according to DTC.

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

5.PERFORM ECM REGISTRATION.

1) Replace the ECM. Engine Control Module (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.

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the immobilizer CM. Body Integrated Unit

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