Dtc B2799 Engine Immobiliser System Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

REGISTER ECU COMMUNICATION ID

CLEAR DTC

CHECK FOR DTC

CHECK CONNECTION OF CONNECTOR

CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)

REPLACE ECM

REGISTER ECU COMMUNICATION ID

CLEAR DTC

CHECK FOR DTC

DTC B2799 Engine Immobiliser System Malfunction


DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects errors in its own communications with the ID code box (immobiliser code ECU); 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the ID code box (immobiliser code ECU) and ECM is different and an engine start is attempted.
Before troubleshooting for this DTC, make sure no certification ECU DTCs are output. If output, troubleshoot the certification ECU DTCs first.

DTC Code
DTC Detection Condition
Trouble Area
B2799
One of the following conditions is met:
  1. An error in the communication between the ECM and ID code box (immobiliser code ECU).
  2. An error in the communication lines.
  3. The communication ID is different during communication with the ID code box (immobiliser code ECU).
  1. Harness or connector
  2. ECM
  3. ID code box (immobiliser code ECU)

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2799 Engine Immobiliser System Malfunction


INSPECTION PROCEDURE

NOTICE:
When replacing the ID code box (immobiliser code ECU) or ECM, refer to the Service Bulletin.
1.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000000QYC07LX.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000000QYC07LX.html).

    OK:
    DTC B2799 is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

3.REGISTER ECU COMMUNICATION ID

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


NEXT


4.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000000QYC07LX.html).


NEXT


5.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000000QYC07LX.html).

    OK:
    DTC B2799 is not output.


NG
Go to step 6
OK

END (ECU COMMUNICATION ID IS NOT REGISTERED CORRECTLY)

6.CHECK CONNECTION OF CONNECTOR

  1. Turn the engine switch off.

  1. Check that the connectors are properly connected to the ECM and ID code box (immobiliser code ECU).

    OK:
    Connectors are properly connected.


NG
CONNECT CONNECTOR CORRECTLY
OK


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

  1. Disconnect the G37 ID code box (immobiliser code ECU) connector.

  1. Disconnect the G56*1, G58*2, G181*3 or G185*4 ECM connector.

    1. *1: for 1GR-FE
    2. *2: for 1KD-FTV
    3. *3: for 2TR-FE
    4. *4: for 1GD-FTV

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

    Standard Resistance:
    for 1GR-FE (for Automatic Transmission)
    Tester Connection
    		Condition
    		Specified Condition
    G37-5 (EFII) - G56-8 (IMO)
    		Always
    		Below 1 Ω
    G37-6 (EFIO) - G56-10 (IMI)
    		Always
    		Below 1 Ω
    G37-5 (EFII) or G56-8 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    G37-6 (EFIO) or G56-10 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 1GR-FE (for Manual Transmission)
    Tester Connection
    		Condition
    		Specified Condition
    G37-5 (EFII) - G56-20 (IMO)
    		Always
    		Below 1 Ω
    G37-6 (EFIO) - G56-14 (IMI)
    		Always
    		Below 1 Ω
    G37-5 (EFII) or G56-20 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    G37-6 (EFIO) or G56-14 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    G37-5 (EFII) - G58-29 (IMO)
    		Always
    		Below 1 Ω
    G37-6 (EFIO) - G58-28 (IMI)
    		Always
    		Below 1 Ω
    G37-5 (EFII) or G58-29 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    G37-6 (EFIO) or G58-28 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 2TR-FE
    Tester Connection
    		Condition
    		Specified Condition
    G37-5 (EFII) - G181-9 (IMO)
    		Always
    		Below 1 Ω
    G37-6 (EFIO) - G181-10 (IMI)
    		Always
    		Below 1 Ω
    G37-5 (EFII) or G181-9 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    G37-6 (EFIO) or G181-10 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 1GD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    G37-5 (EFII) - G185-17 (IMO)
    		Always
    		Below 1 Ω
    G37-6 (EFIO) - G185-16 (IMI)
    		Always
    		Below 1 Ω
    G37-5 (EFII) or G185-17 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    G37-6 (EFIO) or G185-16 (IMI) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.REPLACE ECM

  1. Temporarily replace the ECM with a new one.

    1. for 1GR-FE (LandCruiser RM00000329203TX.html)
    2. for 1KD-FTV (LandCruiser RM0000013Z002CX.html)
    3. for 2TR-FE (LandCruiser RM000000VW203EX.html)
    4. for 1GD-FTV (LandCruiser RM0000013Z002DX.html)

NEXT


9.REGISTER ECU COMMUNICATION ID

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


NEXT


10.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000000QYC07LX.html).


NEXT


11.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000000QYC07LX.html).

    OK:
    DTC B2799 is not output.


NG
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK

END (ECM IS DEFECTIVE)