ENGINE IMMOBILISER SYSTEM(w/o Entry and Start System), Diagnostic DTC:B2796

DTC Code DTC Name
B2796 No Communication in Immobiliser System

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2796 The key code cannot be transmitted (1 trip detection logic*).

  • Key

  • Harness or connector

  • Transponder key ECU assembly

  • Transponder key coil

 Insert the key into the ignition key cylinder.

Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -
Related Data List and Active Test
DTC Code Data List and Active Test
B2796 Response

WIRING DIAGRAM

B0045FSE55
*a Transponder Key ECU Assembly
*b Transponder Key Coil

CAUTION / NOTICE / HINT

Note


  • When replacing the transponder key ECU assembly or key, refer to the Service Bulletin.

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Insert and remove each registered key one at a time, and check for DTCs each time Click here.

      Tech Tips


      • Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      • If DTC B2796 is stored, check for DTCs with the next key after clearing the DTCs.

      OK
      B2796 is not output.
      Result
      Result Proceed to
      B2796 is not output A
      DTC B2796 is output for all of the keys B
      DTC B2796 is output for any of the keys C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    REPLACE KEY Click here

    B

  3. REPLACE TRANSPONDER KEY ECU ASSEMBLY


    1. Replace the transponder key ECU assembly with a new one (Refer to Service Bulletin).


    NEXT

  4. REGISTER KEY


    1. Register the key (Refer to Service Bulletin).


    NEXT

  5. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID (Refer to Service Bulletin).


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      OK
      DTC B2796 is not output.
      Result
      Result Proceed to
      B2796 is not output A
      B2796 is output B

    A

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE KEY THAT DTC IS OUTPUT

  8. REPLACE KEY


    1. Replace the key for which the DTC was stored.

      Note

      Key ID code registration is necessary when replacing the key. Refer to Service Bulletin.


    NEXT

  9. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  10. CHECK FOR DTC


    1. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      OK
      DTC B2796 is not output.
      Result
      Result Proceed to
      B2796 is not output A
      B2796 is output B

    A

    END (KEY WAS DEFECTIVE)

    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLY