ENGINE IMMOBILISER SYSTEM, Diagnostic DTC:B2799/99

DTC Code DTC Name
B2799/99 Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.

DTC No. DTC Detection Condition Trouble Area
B2799/99

One of following conditions is met:


  • Error in communication between ECM and transponder key ECU

  • Error in communication lines

  • Communication ID is different during communication with transponder key ECU

  • ECM

  • Transponder key ECU

  • Wire harness

WIRING DIAGRAM

A01BCWCE01

INSPECTION PROCEDURE

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      OK
      DTC B2799/99 is not output.

    NG

    REGISTER ECU COMMUNICATION ID Click here

    OK

    USE SIMULATION METHOD TO CHECK

  3. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.


    NEXT

  4. CLEAR DTC


    1. Clear the DTCs.


    NEXT

  5. CHECK FOR DTC


    1. Check for DTCs.

      OK
      DTC B2799/99 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 ignition switch OFF.

    2. Check that the connectors are properly connected to the ECM and transponder key ECU.

      OK
      Connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  7. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)


    1. A01BEY6E01

      Disconnect the H44 transponder key ECU connector.

    2. Disconnect the B7*1 or B47*2 ECM connector.


      • *1: 2TR-FE, 2KD-FTV

      • *2: 1KD-FTV

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open)
      2TR-FE
      Tester Connection Specified Condition
      H44-13 (EFIO) - B7-16 (IMI) Below 1 Ω
      H44-12 (EFII) - B7-15 (IMO)
      2KD-FTV
      Tester Connection Specified Condition
      H44-13 (EFIO) - B7-30 (IMI) Below 1 Ω
      H44-12 (EFII) - B7-29 (IMO)
      1KD-FTV
      Tester Connection Specified Condition
      H44-13 (EFIO) - B47-28 (IMI) Below 1 Ω
      H44-12 (EFII) - B47-29 (IMO)
      Standard resistance (Check for short)
      2TR-FE
      Tester Connection Specified Condition
      H44-13 (EFIO) or B7-16 (IMI) - Body ground 10 kΩ or higher
      H44-12 (EFII) or B7-15 (IMO) - Body ground
      2KD-FTV
      Tester Connection Specified Condition
      H44-13 (EFIO) or B7-30 (IMI) - Body ground 10 kΩ or higher
      H44-12 (EFII) or B7-29 (IMO) - Body ground
      1KD-FTV
      Tester Connection Specified Condition
      H44-13 (EFIO) or B47-28 (IMI) - Body ground 10 kΩ or higher
      H44-12 (EFII) or B47-29 (IMO) - Body ground

    4. Reconnect the ECM connector.

    5. Reconnect the transponder key ECU connector.


    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.


    NEXT

  10. CLEAR DTC


    1. Clear the DTCs.


    NEXT

  11. CHECK FOR DTC


    1. Check for DTCs.

      OK
      DTC B2799/99 is not output.

    NG

    REPLACE TRANSPONDER KEY ECU

    OK

    END (ECM IS DEFECTIVE)