2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Immobilizer System DTCS: ECM

ECM DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTC Item Contents of diagnosis Index No.
B1570 ANTENNA Faulty antenna <Ref. to DTC B1570 ANTENNA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1571 REFERENCE CODE INCOMPATIBILITY Reference code incompatibility between body integrated unit and ECM <Ref. to DTC B1571 REFERENCE CODE INCOMPATIBILITY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT Communication failure between body integrated unit and ECM <Ref. to DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1574 KEY COMMUNICATION Communication failure between key and body integrated unit <Ref. to DTC B1574 KEY COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1575 INCORRECT IMMOBILIZER KEY Incorrect immobilizer key (use of unregistered key in body integrated unit) <Ref. to DTC B1575 INCORRECT IMMOBILIZER KEY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1576 EGI CONTROL MODULE EEPROM ECM malfunctioning <Ref. to DTC B1576 EGI CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1577 IMM CONTROL MODULE EEPROM Body integrated unit malfunctioning <Ref. to DTC B1577 IMM CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B1578 METER Except for C0 model
  • Reference code incompatibility between combination meter and body integrated unit
  • Communication failure between body integrated unit and ECM
 <Ref. to DTC B1578 METER , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C0 model
  • Reference code incompatibility between body integrated unit and security control module
  • Communication failure between body integrated unit and ECM
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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