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 an error in its own communication with the ID code box; 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the ID code box and ECM is different and an engine start is attempted.

Tech Tips

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

DTC No. DTC Detection Condition Trouble Area
B2799

One of the following conditions is met:


  • Error in communication between ECD or ECM and ID code box

  • Error in communication lines

  • Communication ID is different between ID code box and ECD or ECM during communication

  • Wire harness or connector

  • ECM

  • ID code box

WIRING DIAGRAM

A0119OGE04

INSPECTION PROCEDURE

Note


  • If the ID code box is replaced, register the ECU code and ECU communication ID.

  • If the ECM is replaced, register the ECU communication ID.

PROCEDURE


  1. RE-REGISTER ECU COMMUNICATION ID


    1. Re-register the ECU communication ID.


    NEXT

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      B2799 output does not recur.

    NG

    CHECK CONNECTOR CONNECTION CONDITION Click here

    OK

    END (ECU COMMUNICATION ID IS DEFECTIVE)

  3. CHECK CONNECTOR CONNECTION CONDITION


    1. Turn the engine switch off.

    2. Check that the connectors are properly connected to the ECD or ECM and the ID code box.

      OK
      Connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

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


    1. Disconnect the ID code box connector.

    2. Disconnect the ECM connector.

      A011A9XE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to ID Code Box)

      		 *2

      Front view of wire harness connector

      (to ECM)
      *3 for 1KR-FE and 1NR-FE *4 for 1ND-TV

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


      1. for 1ND-TV

        Standard Resistance
        Tester Connection Condition Specified Condition
        D30-5 (EFII) - A19-74 (IMO) Always Below 1 Ω
        D30-6 (EFIO) - A19-77 (IMI) Always Below 1 Ω
        D30-5 (EFII) - Body ground Always 10 kΩ or higher
        D30-6 (EFIO) - Body ground Always 10 kΩ or higher

      2. for 1KR-FE

        Standard Resistance
        Tester Connection Condition Specified Condition
        D30-5 (EFII) - A18-10 (IMO) Always Below 1 Ω
        D30-6 (EFIO) - A18-11 (IMI) Always Below 1 Ω
        D30-5 (EFII) - Body ground Always 10 kΩ or higher
        D30-6 (EFIO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE ECM


    1. Replace the ECM.



    NEXT

  6. REGISTER ECU COMMUNICATION ID


    1. Register the ECU communication ID.


    NEXT

  7. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      B2799 output does not recur.

    NG

    REPLACE ID CODE BOX

    OK

    END (ECM IS DEFECTIVE)