ENGINE IMMOBILISER SYSTEM(w/ Entry and Start System), Diagnostic DTC:B1577

DTC Code DTC Name
B1577 Immobiliser System EEPROM Malfunction

DESCRIPTION

The ECM stores this code when an internal malfunction is detected in the certification ECU (smart key ECU assembly) or when the ROM in the certification ECU (smart key ECU assembly) cannot be accessed.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B1577

  • Internal malfunction in the certification ECU (smart key ECU assembly) (1 trip detection logic*).

  • When the ROM in the certification ECU (smart key ECU assembly) cannot be accessed (1 trip detection logic*).

 Certification ECU (smart key ECU assembly) Check for DTCs.

Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started Engine switch on (IG)
Related Data List and Active Test
DTC Code Data List and Active Test
B1577 -

CAUTION / NOTICE / HINT

Note


  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B1577 is not output.

    OK

    END

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)