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

DTC Code DTC Name
B2799 Immobiliser Malfunction

DESCRIPTION

  • w/ Multi-information Display (Dot Display Type):

    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/ Multi-information Display (Segment Display Type):

    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

  • Telephone transceiver assembly*6

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/ Multi-information Display (Dot Display Type)

  • *2: w/ Multi-information Display (Segment Display Type)

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

  • *4: except Manual Transaxle

  • *5: for Manual Transaxle

  • *6: w/ Blocking System

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. w/o Blocking System

    B278902E05

  2. 2. w/ Blocking System

    B278903E02

CAUTION / NOTICE / HINT

Note:

  • When replacing the certification ECU (smart key ECU assembly)*1, ID code box (immobiliser code ECU)*2 or telephone transceiver assembly*3, refer to the Service Bulletin.

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

  • When the telephone transceiver assembly is replaced, it is necessary to set the contract mode.*3

  • *1: w/ Multi-information Display (Segment Display Type)

  • *2: w/ Multi-information Display (Dot Display Type)

  • *3: w/ Blocking System

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

    w/o Blocking System

    w/ Blocking System
    w/ Blocking System

    CHECK HARNESS AND CONNECTOR (ECM - TELEPHONE TRANSCEIVER ASSEMBLY)Click here

    w/o Blocking System

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

    • *1: w/ Multi-information Display (Dot Display Type)

    • *2: w/ Multi-information Display (Segment Display Type)

    • *3: for Gasoline

    • *4: for Diesel

    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 or A61*4 ECM connector.

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

      Standard Resistance

      Table 3. for Gasoline

      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 Diesel

      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/ Multi-information Display (Dot Display Type)

      • *2: w/ Multi-information Display (Segment Display Type)

    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 1AD-FTV:

      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/ Multi-information Display [Dot Display Type])

    NG (w/ Multi-information Display [Segment Display Type])
    OK

    END (ECM WAS DEFECTIVE)

    NG (w/ Multi-information Display [Dot Display Type])

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    NG (w/ Multi-information Display [Segment Display Type])

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  10. CHECK HARNESS AND CONNECTOR (ECM - TELEPHONE TRANSCEIVER ASSEMBLY)

    1. Disconnect the A62 ECM connector.

    2. Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A62-29 (IMO) - G58-7 (BLK2)

      Always

      Below 1 Ω

      A62-29 (IMO) - Body ground

      Always

      10 kΩ or higher

      G58-7 (BLK2) - Body ground

      Always

      10 kΩ or higher

      A62-28 (IMI) - G58-8 (BLK3)

      Always

      Below 1 Ω

      A62-28 (IMI) - Body ground

      Always

      10 kΩ or higher

      G58-8 (BLK3) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - TELEPHONE TRANSCEIVER ASSEMBLY)

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

    2. Disconnect the G58 telephone transceiver assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G82-14 (EFII) - G58-1 (BLK1)

      Always

      Below 1 Ω

      G82-14 (EFII) - Body ground

      Always

      10 kΩ or higher

      G58-1 (BLK1) - Body ground

      Always

      10 kΩ or higher

      G82-13 (EFIO) - G58-2 (BLK4)

      Always

      Below 1 Ω

      G82-13 (EFIO) - Body ground

      Always

      10 kΩ or higher

      G58-2 (BLK4) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REGISTER ECU COMMUNICATION ID

    1. Reregister the ECU communication ID.

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  13. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  14. CHECK FOR DTC

    1. Check for DTCs.

      Click here

      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

  15. REPLACE TELEPHONE TRANSCEIVER ASSEMBLY

    1. Temporarily replace the telephone transceiver assembly with a new or known good one.

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  16. REGISTER ECU COMMUNICATION ID

    1. Reregister the ECU communication ID.

      Tip:

      Refer to the Service Bulletin.

    Result

    Proceed to

    NEXT
    NEXT

  17. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  18. CHECK FOR DTC

    1. Check for DTCs.

      Click here

      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
    B2799 is not output

    END (TELEPHONE TRANSCEIVER ASSEMBLY WAS DEFECTIVE)

    B2799 is output

    REPLACE ECMClick here