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Subaru Legacy BN/BS (2015-2019) Service Manual: List of diagnostic trouble code (dtc) list

Subaru Legacy BN/BS (2015-2019) Service Manual / Immobilizer (diagnostics) / List of diagnostic trouble code (dtc) list

NOTE:

If DTCs irrelevant to the immobilizer are detected, perform diagnosis according to the DTCs irrelevant to the immobilizer first.

1. ECM

DTC

Item

Note

B1570

ANTENNA

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1570 ANTENNA

B1571

REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)

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

B1572

IMM CIRCUIT EXCEPT ANTENNA CIRCUIT

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT

B1574

KEY COMMUNICATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1574 KEY COMMUNICATION

B1575

INCORRECT IMMOBILIZER KEY

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1575 INCORRECT IMMOBILIZER KEY

B1576

EGI CONTROL MODULE EEPROM

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1576 EGI CONTROL MODULE EEPROM

B1577

IMM CONTROL MODULE EEPROM

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1577 IMM CONTROL MODULE EEPROM

B1578

METER

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1578 METER

2. BODY INTEGRATED UNIT

NOTE:

Except for C0 and C5 models

DTC

Item

Note

Relation between ECM and DTC

B1401

METER COLLATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1401 METER COLLATION

B1578

B1402

IMMOBILIZER KEY COLLATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1402 IMMOBILIZER KEY COLLATION

B1575

B1407

MET COMMUNICATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1407 MET COMMUNICATION

B1578

B1408

METER NON-VOLATILE MEMORY

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1408 METER NON-VOLATILE MEMORY

B1578

B1410

TRANSPONDER COMMUNICATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1410 TRANSPONDER COMMUNICATION

B1574

B1411

IMMOBILIZER ANTENNA

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1411 IMMOBILIZER ANTENNA

B1570

NOTE:

The starter relay control is performed in immobilizer system. When the body integrated unit detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Check that the engine does not start on the DTC of body integrated unit.

3. IMMOBILIZER CM

NOTE:

For C0 and C5 models

DTC

Item

Note

Relation between ECM and DTC

B1402

IMMOBILIZER KEY COLLATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1402 IMMOBILIZER KEY COLLATION

B1575

B1410

TRANSPONDER COMMUNICATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1410 TRANSPONDER COMMUNICATION

B1574

B1411

IMMOBILIZER ANTENNA

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1411 IMMOBILIZER ANTENNA

B1570

B1412

IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1412 IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK

B1413

IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1413 IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY

B1414

IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1414 IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY

B1577

NOTE:

The starter relay control is performed in immobilizer system. When the immobilizer CM detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Therefore, check DTC for the immobilizer CM to identify the cause of the engine not starting.

Inspection mode procedure
It is possible to diagnose the DTC by performing the indicated inspection mode. After correcting the DTC, perform a necessary inspection mode and make sure that the function is resumed correctly and t ...

Read diagnostic trouble code (dtc) operation
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