ENGINE 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. DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2796 The key ID code cannot be transmitted to the transponder key ECU assembly (1 trip detection logic*).

  • Key

  • Harness or connector

  • Transponder key coil

    Transponder key ECU assembly

 Insert the key into the ignition key cylinder

*: Only output while a malfunction is present.

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

B001WS0E66
*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 the Service Bulletin.

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

  • When using the GTS with the vehicle ignition switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Immobiliser. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

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.

      OK
      DTC B2796 is not output.
      Result
      Result Proceed to
      DTC 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 the Service Bulletin.

      Note

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

      Refer to the Service Bulletin.


    NEXT

  4. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  5. 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.

    OK

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE KEY FOR WHICH DTC WAS 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 the Service Bulletin.


    NEXT

  7. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  8. 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