IMMOBILISER SYSTEM, Diagnostic DTC:B2799

DTC Code DTC Name
B2799 Immobiliser Malfunction

DESCRIPTION

When there is a communication malfunction between the ECM and ID code box (immobiliser code ECU), or when the communication ID codes do not match, the ECM stores this DTC.

DTC Code DTC Detection Condition Trouble Area
B2799

Either condition is met (1 trip detection logic*):


  • A malfunction in the communication or communication lines between the ECM and ID code box (immobiliser code ECU).

  • A matching communication code cannot be verified during communication between the ECM and ID code box (immobiliser code ECU).

  • ID code box (immobiliser code ECU)

  • ECM

  • Harness or connector

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
B2799 -

WIRING DIAGRAM

for 3UR-FE:

A01WT0VE02

for 1VD-FTV:

A01WT0VE03

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off, connect the GTS to the DLC3 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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). 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.

  • Before replacing the ECM or ID code box (immobiliser code ECU), refer to Service Bulletin.

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

Tech Tips

When DTC B2799 and the certification ECU (smart key ECU assembly) DTC are output simultaneously, first perform troubleshooting for the certification ECU (smart key ECU assembly) DTC.

PROCEDURE


  1. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  2. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  3. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

      OK
      DTC B2799 is not output.

    OK

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    NG

  4. CHECK HARNESS AND CONNECTOR (ID CODE BOX [IMMOBILISER CODE ECU] - ECM)


    1. Disconnect the E136 ID code box (immobiliser code ECU) connector.

    2. Disconnect the A38*1, *3, A87*1, *4, A85*2, *3 or A86*2, *4 ECM connector.


      • *1: for 3UR-FE

      • *2: for 1VD-FTV

      • *3: for LHD

      • *4: for RHD

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for 3UR-FE (for LHD):
      Tester Connection Condition Specified Condition
      E136-4 (EFIO) - A38-46 (IMI) Always Below 1 Ω
      E136-3 (EFII) - A38-48 (IMO) Always Below 1 Ω
      E136-4 (EFIO) or A38-46 (IMI) - Body ground Always 10 kΩ or higher
      E136-3 (EFII) or A38-48 (IMO) - Body ground Always 10 kΩ or higher
      for 3UR-FE (for RHD):
      Tester Connection Condition Specified Condition
      E136-4 (EFIO) - A87-46 (IMI) Always Below 1 Ω
      E136-3 (EFII) - A87-48 (IMO) Always Below 1 Ω
      E136-4 (EFIO) or A87-46 (IMI) - Body ground Always 10 kΩ or higher
      E136-3 (EFII) or A87-48 (IMO) - Body ground Always 10 kΩ or higher
      for 1VD-FTV (for LHD):
      Tester Connection Condition Specified Condition
      E136-4 (EFIO) - A85-11 (IMI) Always Below 1 Ω
      E136-3 (EFII) - A85-10 (IMO) Always Below 1 Ω
      E136-4 (EFIO) or A85-11 (IMI) - Body ground Always 10 kΩ or higher
      E136-3 (EFII) or A85-10 (IMO) - Body ground Always 10 kΩ or higher
      for 1VD-FTV (for RHD):
      Tester Connection Condition Specified Condition
      E136-4 (EFIO) - A86-11 (IMI) Always Below 1 Ω
      E136-3 (EFII) - A86-10 (IMO) Always Below 1 Ω
      E136-4 (EFIO) or A86-11 (IMI) - Body ground Always 10 kΩ or higher
      E136-3 (EFII) or A86-10 (IMO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU) with a new one.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  6. REGISTER RECOGNITION CODE


    1. Register the recognition codes in the ECUs.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  7. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  8. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  9. CHECK FOR DTC


    1. Perform "DTC Output Confirmation Operation" procedure.

    2. Check for DTCs Click here.

      OK
      DTC B2799 is not output.
      Result Proceed to
      OK A
      NG (for 3UR-FE) B
      NG (for 1VD-FTV) C

    A

    END (ID CODE BOX [IMMOBILISER CODE ECU] WAS DEFECTIVE)

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here