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

DTC Code DTC Name
B2799 Immobiliser Malfunction

DESCRIPTION

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

    When there is a communication malfunction between the ECM and ID code box (immobiliser code ECU), or when the communication ID codes do not match, the ECM stores this DTC.

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

    When there are communication malfunctions between the ECM and certification ECU (smart key ECU assembly), or when the communication ID codes do not match, the ECM stores this DTC.

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).

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

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

  • *3: Only output while a malfunction is present.

  • *4: except Manual Transaxle

  • *5: for Manual Transaxle

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 No.

Data List and Active Test

B2799

-

WIRING DIAGRAM

  1. 1. for 3ZR Series Engine

    B278902E08

  2. 2. except 3ZR Series Engine

    B278902E06

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)

Tip:

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

      Table 3. 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
      Table 4. 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
      Table 5. 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
      Table 6. 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

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REGISTER ECU COMMUNICATION ID

    1. Reregister the ECU communication ID.

      Tip:

      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

      Tip:

      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

    END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

    Other DTCs are output

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    Click here

    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.

      Tip:

      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

      Tip:

      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

    END (ECM WAS DEFECTIVE)

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

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

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

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)