Dtc B2799 Engine Immobiliser System Malfunction

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

REGISTER ECU COMMUNICATION ID

CHECK WHETHER ENGINE STARTS

REPLACE ECM

CHECK WHETHER ENGINE STARTS

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)

DTC B2799 Engine Immobiliser System Malfunction


DESCRIPTION

The ECM stores this DTC when the communication line between the ECM and transponder key ECU assembly is malfunctioning or the communication ID of the ECM and transponder key ECU assembly do not match.

DTC No.
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2799
One of the following conditions is met:
  1. Error in communication between ECM and transponder key ECU assembly.
  2. Error in communication lines.
  3. Communication ID is different during communication between ECM and transponder key ECU assembly.
  1. Wire harness or connector
  2. Transponder key ECU
  3. ECM
  1. Start the engine and wait 10 seconds.*1
  2. After disconnecting and reconnecting the cable to the negative (-) battery terminal, turn the ignition switch to ON and wait 10 seconds.*2
    *1: Communication starts within 3 seconds of starting the engine. If verification fails, this DTC is stored 6 seconds after communication has completed.
    *2: Communication starts within 3 seconds of turning the ignition switch to ON. If verification fails, this DTC is stored 6 seconds after communication has completed.

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


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2799 Engine Immobiliser System Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. If the transponder key ECU assembly or ECM is replaced, refer to Service Bulletin.
  2. After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  3. When using the GTS with the vehicle ignition switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Immobiliser. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
HINT:
If transponder key ECU assembly DTCs are output simultaneously, troubleshoot the transponder key ECU assembly DTCs first.
1.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


2.CHECK FOR DTC

  1. Start the engine.

  1. Check for DTCs (Click here).

    HINT:
    Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
    OK:
    DTC B2799 is not output.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (DTC B2799 is output)
    		B
    NG (Other DTCs are output)
    		C


B
Go to step 3

C
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)

3.REGISTER ECU COMMUNICATION ID

  1. Reregister the ECU communication ID.

    HINT:
    Refer to Service Bulletin.

NEXT


4.CHECK WHETHER ENGINE STARTS

  1. Using a registered key, turn the ignition switch to ON.

  1. Check that the engine starts 5 seconds after the ignition switch was turned to ON.

    OK:
    Engine starts normally.


NG
Go to step 5
OK

END (ECU COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

5.REPLACE ECM

  1. Temporarily replace the ECM with a new one or known good one.

    1. for 1GR-FE: Click here
    2. for 1VD-FTV: Click here

NEXT


6.CHECK WHETHER ENGINE STARTS

  1. Using a registered key, turn the ignition switch to ON.

  1. Check that the engine starts 5 seconds after the ignition switch was turned to ON.

    OK:
    Engine starts normally.


NG
Go to step 7
OK

END (ECM WAS DEFECTIVE)

7.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)

  1. Disconnect the E96 transponder key ECU assembly connector.

  1. Disconnect the A38*1 or A52*2 ECM connector.

  1. *1: for LHD
  2. *2: for RHD

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    E96-12 (EFII) - A38-29 (IMO)
    		Always
    		Below 1 Ω
    E96-13 (EFIO) - A38-40 (IMI)
    		Always
    		Below 1 Ω
    E96-12 (EFII) - Body ground
    		Always
    		10 kΩ or higher
    E96-13 (EFIO) - Body ground
    		Always
    		10 kΩ or higher
    A38-29 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    A38-40 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    E96-12 (EFII) - A52-29 (IMO)
    		Always
    		Below 1 Ω
    E96-13 (EFIO) - A52-40 (IMI)
    		Always
    		Below 1 Ω
    E96-12 (EFII) - Body ground
    		Always
    		10 kΩ or higher
    E96-13 (EFIO) - Body ground
    		Always
    		10 kΩ or higher
    A52-29 (IMO) - Body ground
    		Always
    		10 kΩ or higher
    A52-40 (IMI) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)