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

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DTC Code DTC Name
B2799 Engine Immobiliser System Malfunction
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DESCRIPTION

When there are communication malfunctions 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 DTC Output Confirmation Operation
B2799

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


  • A malfunction occurs 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

Either condition is met:


  • Within 10 seconds of an engine start operation being performed (with the shift lever in P*2 and the brake pedal*2 or clutch pedal*3 depressed, press the engine switch while carrying the electrical key transmitter sub-assembly). If there is a malfunction, the engine stops (communication begins within 3 seconds of the engine start operation being performed, and DTCs are stored after 6 seconds).

  • 10 seconds after the engine switch is turned on (IG) after reconnecting the cable to the negative (-) battery terminal (communication begins within 3 seconds of the engine switch being turned on (IG), and DTCs are stored after 6 seconds).

Table 1. Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -
Table 2. Related Data List and Active Test
DTC Code Data List and Active Test
B2799 -
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Before replacing the ID code box (immobiliser code ECU), refer to the entry and start system (for Entry Function) (Click here).

  • When replacing the ECM, refer to the INITIALIZATION (Click here).

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Tip:

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.

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM)


    1. Disconnect the F60 ID code box (immobiliser code ECU) connector.

    2. Disconnect the A93*1, A58*2, A59*3 or A108*4 ECM connector.


      • *1: for 1KR-FE

      • *2: for 1NR-FE

      • *3: for 1ND-TV without DPF

      • *4: for 1ND-TV with DPF

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

      Standard Resistance
      Table 3. for 1KR-FE
      Tester Connection Condition Specified Condition
      F60-3 (EFII) - A93-43 (IMO) Always Below 1 Ω
      F60-4 (EFIO) - A93-42 (IMI) Always Below 1 Ω
      F60-3 (EFII) - Body ground Always 10 kΩ or higher
      F60-4 (EFIO) - Body ground Always 10 kΩ or higher
      Table 4. for 1NR-FE
      Tester Connection Condition Specified Condition
      F60-3 (EFII) - A58-29 (IMO) Always Below 1 Ω
      F60-4 (EFIO) - A58-28 (IMI) Always Below 1 Ω
      F60-3 (EFII) - Body ground Always 10 kΩ or higher
      F60-4 (EFIO) - Body ground Always 10 kΩ or higher
      Table 5. for 1ND-TV without DPF
      Tester Connection Condition Specified Condition
      F60-3 (EFII) - A59-78 (IMO) Always Below 1 Ω
      F60-4 (EFIO) - A59-77 (IMI) Always Below 1 Ω
      F60-3 (EFII) - Body ground Always 10 kΩ or higher
      F60-4 (EFIO) - Body ground Always 10 kΩ or higher
      Table 6. for 1ND-TV with DPF
      Tester Connection Condition Specified Condition
      F60-3 (EFII) - A108-29 (IMO) Always Below 1 Ω
      F60-4 (EFIO) - A108-34 (IMI) Always Below 1 Ω
      F60-3 (EFII) - Body ground Always 10 kΩ or higher
      F60-4 (EFIO) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  2. Click here

    REGISTER ECU COMMUNICATION ID


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


  3. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  4. Click here

    CHECK FOR DTC


    1. Check for DTCs (Click here).

      Tip:

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      OK
      DTC B2799 is not output.

    • OK

      END (ECU COMMUNICATION ID HAS NOT BEEN REGISTERED)

    • NGClick here
  5. Click here

    REPLACE ECM


    1. Temporarily replace the ECM with a new one.

      Tip:

  6. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  7. Click here

    CHECK FOR DTC


    1. Check for DTCs (Click here).

      Tip:

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      OK
      DTC B2799 is not output.

    • OK

      END (ECM WAS DEFECTIVE)

    • NG

      REPLACE ID CODE BOX (IMMOBILISER CODE ECU)