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

DTC Code DTC Name
B2799 Immobiliser Malfunction

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2799 Immobiliser Malfunction

Either condition is met (1 trip detection logic*3):


  • A malfunction in the communication or communication lines between the ECM and ID code box (immobiliser code ECU)*1 or certification ECU (smart key ECU assembly)*2.

  • A matching communication code cannot be verified during communication between the ECM and ID code box (immobiliser code ECU)*1 or certification ECU (smart key ECU assembly)*2.


  • ID code box (immobiliser code ECU)*1

  • Certification ECU (smart key ECU assembly)*2

  • ECM

  • Harness or connector

DTC output confirmation operation (Either condition is met):


  • Within 10 seconds of an engine start operation being performed (with the shift lever in P*4 and the brake pedal*4 or clutch pedal*5 depressed, the engine switch is pressed while the key is being carried). 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).


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 No. Data List and Active Test
B2799 -

WIRING DIAGRAM


  1. 1. for 3ZR Series Engine

    A01V7LIE08
  2. 2. except 3ZR Series Engine

    A01V7LIE06

CAUTION / NOTICE / HINT

Note


  • When replacing the certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2, refer to the Service Bulletin.

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


  • *1: w/ ID code box (Immobiliser Code ECU)

  • *2: w/o ID code box (Immobiliser Code ECU)

Tech Tips

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

PROCEDURE


  1. SYSTEM CHECK


    1. Check the vehicle specification.

      Result
      Proceed to
      NEXT

    NEXT
  2. CHECK HARNESS AND CONNECTOR (ID CODE BOX [IMMOBILISER CODE ECU] OR CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - ECM)


    • *1: w/ ID code box (Immobiliser Code ECU)

    • *2: w/o ID code box (Immobiliser Code ECU)

    • *3: for 3ZR-FE (for K111, K111F), 3ZR-FEA, 2AR-FE

    • *4: for 3ZR-FE (except K111, K111F)

    • *5: for 2WW

    • *6: for 2AD-FHV, 2AD-FTV


    1. Disconnect the G44 ID code box (immobiliser code ECU) connector.*1

    2. Disconnect the G82 certification ECU (smart key ECU assembly) connector.*2

    3. Disconnect the A62*3, *4, *5 or A61*6 ECM connector.

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

      Standard Resistance
      for 3ZR-FE (for K111, K111F), 3ZR-FEA, 2AR-FR
      Tester Connection Condition Specified Condition
      G44-3 (EFII) - A62-29 (IMO)*1 Always Below 1 Ω
      G82-14 (EFII) - A62-29 (IMO)*2
      A62-29 (IMO) - Body ground Always 10 kΩ or higher
      G44-3 (EFII) - Body ground*1 Always 10 kΩ or higher
      G82-14 (EFII) - Body ground*2 Always 10 kΩ or higher
      G44-4 (EFIO) - A62-28 (IMI)*1 Always Below 1 Ω
      G82-13 (EFIO) - A62-28 (IMI)*2
      A62-28 (IMI) - Body ground Always 10 kΩ or higher
      G44-4 (EFIO) - Body ground*1 Always 10 kΩ or higher
      G82-13 (EFIO) - Body ground*2 Always 10 kΩ or higher
      for 3ZR-FE (except K111, K111F)
      Tester Connection Condition Specified Condition
      G44-3 (EFII) - A62-45 (IMO)*1 Always Below 1 Ω
      G82-13 (EFII) - A62-45 (IMO)*2
      A62-45 (IMO) - Body ground Always 10 kΩ or higher
      G44-3 (EFII) - Body ground*1 Always 10 kΩ or higher
      G82-14 (EFII) - Body ground*2 Always 10 kΩ or higher
      G44-4 (EFIO) - A62-28 (IMI)*1 Always Below 1 Ω
      G82-13 (EFIO) - A62-28 (IMI)*2
      A62-28 (IMI) - Body ground Always 10 kΩ or higher
      G44-4 (EFIO) - Body ground*1 Always 10 kΩ or higher
      G82-13 (EFIO) - Body ground*2 Always 10 kΩ or higher
      for 2WW
      Tester Connection Condition Specified Condition
      G44-3 (EFII) - A62-44 (IMO)*1 Always Below 1 Ω
      A62-44 (IMO) - Body ground Always 10 kΩ or higher
      G44-3 (EFII) - Body ground*1 Always 10 kΩ or higher
      G44-4 (EFIO) - A62-34 (IMI)*1 Always Below 1 Ω
      A62-34 (IMI) - Body ground Always 10 kΩ or higher
      G44-4 (EFIO) - Body ground*1 Always 10 kΩ or higher
      for 2AD-FHV, 2AD-FTV
      Tester Connection Condition Specified Condition
      G44-3 (EFII) - A61-15 (IMO)*1 Always Below 1 Ω
      G82-14 (EFII) - A61-15 (IMO)*2
      A61-15 (IMO) - Body ground Always 10 kΩ or higher
      G44-3 (EFII) - Body ground*1 Always 10 kΩ or higher
      G82-14 (EFII) - Body ground*2 Always 10 kΩ or higher
      G44-4 (EFIO) - A61-16 (IMI)*1 Always Below 1 Ω
      G82-13 (EFIO) - A61-16 (IMI)*2
      A61-16 (IMI) - Body ground Always 10 kΩ or higher
      G44-4 (EFIO) - Body ground*1 Always 10 kΩ or higher
      G82-13 (EFIO) - Body ground*2 Always 10 kΩ or higher

      • *1: w/ ID code box (Immobiliser Code ECU)

      • *2: w/o ID code box (Immobiliser Code ECU)

      Result
      Proceed to
      OK
      NG

    NG
    OK
  3. REGISTER ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to the Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT
  4. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Engine > Clear DTCs
      Powertrain > Engine and ECT > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT
  5. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Powertrain > Engine > Trouble Codes
      Powertrain > Engine and ECT > Trouble Codes

      Tech Tips

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

      Result
      Proceed to
      B2799 is not output
      B2799 is output
      Other DTCs are output

    B2799 is not output
    Other DTCs are output
    B2799 is output
  6. REPLACE ECM


    1. Temporarily replace the ECM with a new one.

      for 2AR-FE:

      Click here

      for 3ZR-FAE:

      Click here

      for 3ZR-FE:

      Click here

      for 2WW:

      Click here

      for 2AD-FTV:

      Click here

      for 2AD-FHV:

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  7. REGISTER ECU COMMUNICATION ID


    1. Reregister the ECU communication ID.

      Tech Tips

      Refer to the Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT
  8. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Engine > Clear DTCs
      Powertrain > Engine and ECT > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT
  9. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Powertrain > Engine > Trouble Codes
      Powertrain > Engine and ECT > Trouble Codes

      Tech Tips

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

      OK
      DTC B2799 is not output.
      Result
      Proceed to
      OK
      NG (w/ ID code box [Immobiliser Code ECU])
      NG (w/o ID code box [Immobiliser Code ECU])

    OK
    NG (w/ ID code box [Immobiliser Code ECU])
    NG (w/o ID code box [Immobiliser Code ECU])