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

DTC Code DTC Name
B2796 No Communication in Immobiliser System

DESCRIPTION

This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly 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*).

  • Door control transmitter assembly

  • Wire harness or connector

  • Transponder key coil

  • Transponder key ECU assembly

 Insert the door control transmitter assembly into the ignition key cylinder, turn the ignition switch from off to ON and wait at least 20 seconds.

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

B000HK5E31

INSPECTION PROCEDURE

Note


  • If the transponder key ECU assembly or a door control transmitter assembly 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 Click here.


    NEXT

  2. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

      OK
      B2796 is not output.
      Result
      Result Proceed to
      DTC B2796 is output for all of the door control transmitter assemblies A
      DTC B2796 is output for any of the door control transmitter assemblies B
      B2796 is not output C

    B

    REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  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 a transponder key ECU assembly, refer to Service Bulletin.


    NEXT

  4. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  5. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

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

    B

    REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY THAT DTC IS OUTPUT

    A

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

  6. REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY


    1. Replace the door control transmitter assembly for which the DTC was stored.

      Note

      Key ID code registration is necessary when replacing a door control transmitter assembly, refer to Service Bulletin.


    NEXT

  7. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  8. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

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

    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

    A

    END (DOOR CONTROL TRANSMITTER ASSEMBLY WAS DEFECTIVE)