ENGINE IMMOBILISER SYSTEM (w/ Entry and Start System), Diagnostic DTC:B2799

DTC Code DTC Name
B2799 Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communications with the ID code box (immobiliser code ECU); 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the ID code box (immobiliser code ECU) and ECM is different and an engine start is attempted.

Before troubleshooting for this DTC, make sure no certification ECU DTCs are output. If output, troubleshoot the certification ECU DTCs first.

DTC Code DTC Detection Condition Trouble Area
B2799

One of the following conditions is met:


  • An error in the communication between the ECM and ID code box (immobiliser code ECU).

  • An error in the communication lines.

  • The communication ID is different during communication with the ID code box (immobiliser code ECU).

  • Harness or connector

  • ECM

  • ID code box (immobiliser code ECU)

WIRING DIAGRAM

A00KVYME05

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2799 is not output.

    NG

    REGISTER ECU COMMUNICATION ID Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID (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.

      OK
      DTC B2799 is not output.

    NG

    CHECK CONNECTION OF CONNECTOR Click here

    OK

    END (ECU COMMUNICATION ID IS NOT REGISTERED CORRECTLY)

  6. CHECK CONNECTION OF CONNECTOR


    1. Turn the engine switch off.

    2. Check that the connectors are properly connected to the ECM and ID code box (immobiliser code ECU).

      OK
      Connectors are properly connected.

    NG

    CONNECT CONNECTOR CORRECTLY

    OK

  7. CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)


    1. Disconnect the G37 ID code box (immobiliser code ECU) connector.

    2. Disconnect the G56*1 or G58*2 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

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

      Standard Resistance
      for 1GR-FE
      Tester Connection Condition Specified Condition
      G37-5 (EFII) - G56-20 (IMO) Always Below 1 Ω
      G37-6 (EFIO) - G56-14 (IMI) Always Below 1 Ω
      G37-5 (EFII) or G56-20 (IMO) - Body ground Always 10 kΩ or higher
      G37-6 (EFIO) or G56-14 (IMI) - Body ground Always 10 kΩ or higher
      for 1KD-FTV
      Tester Connection Condition Specified Condition
      G37-5 (EFII) - G58-29 (IMO) Always Below 1 Ω
      G37-6 (EFIO) - G58-28 (IMI) Always Below 1 Ω
      G37-5 (EFII) or G58-29 (IMO) - Body ground Always 10 kΩ or higher
      G37-6 (EFIO) or G58-28 (IMI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE ECM


    1. Temporarily replace the ECM with a new one.



    NEXT

  9. REGISTER ECU COMMUNICATION ID


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


    NEXT

  10. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  11. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2799 is not output.

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END (ECM IS DEFECTIVE)