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

DTC Code DTC Name
B2796 No Communication in Immobiliser System

DESCRIPTION

This DTC is stored when a key is inserted into the ignition key cylinder but no communication occurs between the key and transponder key ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2796 No Communication in Immobiliser System The key ID code cannot be transmitted to the transponder key ECU assembly (1 trip detection logic*).

  • Key

  • Wire harness or connector

  • Transponder key coil

  • Transponder key ECU assembly

    DTC Output Confirmation Operation:

  • 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 No. Data List and Active Test
B2796 -

WIRING DIAGRAM

B0044IIE09
*a Transponder Key ECU Assembly
*b Transponder Key Coil

CAUTION / NOTICE / HINT

Note


  • If the transponder key ECU assembly or key is replaced, refer to Service Bulletin.

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

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > Immobiliser > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


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


      Body Electrical > Immobiliser > Trouble Codes

      Tech Tips

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

      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.

      Tech Tips

      Refer to Service Bulletin.

      Note

      Key ID code registration is necessary when replacing the transponder key ECU assembly.

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  4. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > Immobiliser > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR DTC


    1. Check for DTCs.


      Body Electrical > Immobiliser > Trouble Codes

      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

  6. 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.

      Result
      Proceed to
      NEXT

    NEXT

  7. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > Immobiliser > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  8. CHECK FOR DTC


    1. Check for DTCs.


      Body Electrical > Immobiliser > Trouble Codes

      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