Dtc B2799 Engine Immobiliser System Malfunction

Securities. Camry. Acv40 Gsv40
Engine Immobiliser. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

RE-REGISTER ECU COMMUNICATION ID

CHECK DTC OUTPUT

CHECK CONNECTOR CONNECTION CONDITION

CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)

REPLACE ECM

REGISTER ECU COMMUNICATION ID

CHECK DTC OUTPUT

DTC B2799 Engine Immobiliser System Malfunction


DESCRIPTION

This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the ID code box (immobiliser code ECU); 2) the ECM detects an error 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.
HINT:
Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart key ECU assembly) DTCs first.

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

WIRING DIAGRAM


Camry. Acv40 Gsv40.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2799 Engine Immobiliser System Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. If the ID code box (immobiliser code ECU) is replaced, register the ECU code and ECU communication ID.
  2. If the ECM is replaced, register the ECU communication ID.
1.CHECK DTC OUTPUT

  1. Clear the DTCs (CAMRY_ACV40 RM000001GV802CX.html).

  1. Recheck for DTCs (CAMRY_ACV40 RM000001GV802CX.html).

    OK:
    B2799 output does not recur.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000UZ104DX.html)

2.RE-REGISTER ECU COMMUNICATION ID

  1. Re-register the ECU communication ID.


NEXT


3.CHECK DTC OUTPUT

  1. Clear the DTCs (CAMRY_ACV40 RM000001GV802CX.html).

  1. Recheck for DTCs (CAMRY_ACV40 RM000001GV802CX.html).

    OK:
    B2799 output does not recur.


NG
Go to step 4
OK

END (ECU COMMUNICATION ID WAS INCORRECT)

4.CHECK CONNECTOR CONNECTION CONDITION

  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 CONNECTORS PROPERLY
OK


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

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



  1. Disconnect the ECM connector.


    Camry. Acv40 Gsv40.Engine Immobiliser.Engine Immobiliser System (W/ Entry And Start System). Dtc B2799 Engine Immobiliser System Malfunction

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

    Standard Resistance:
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    E68-5 (EFII) - A24-10 (IMO)
    		Always
    		Below 1 Ω
    E68-6 (EFIO) - A24-11 (IMI)
    		Always
    		Below 1 Ω
    E68-5 (EFII) - Body ground
    		Always
    		10 kΩ or higher
    E68-6 (EFIO) - Body ground
    		Always
    		10 kΩ or higher
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    E68-5 (EFII) - A55-10 (IMO)
    		Always
    		Below 1 Ω
    E68-6 (EFIO) - A55-11 (IMI)
    		Always
    		Below 1 Ω
    E68-5 (EFII) - Body ground
    		Always
    		10 kΩ or higher
    E68-6 (EFIO) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.REPLACE ECM

  1. Replace the ECM (CAMRY_ACV40 RM0000022NT00VX.html).


NEXT


7.REGISTER ECU COMMUNICATION ID

  1. Register the ECU communication ID.


NEXT


8.CHECK DTC OUTPUT

  1. Clear the DTCs (CAMRY_ACV40 RM000001GV802CX.html).

  1. Recheck for DTCs (CAMRY_ACV40 RM000001GV802CX.html).

    OK:
    B2799 output does not recur.


NG
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
OK

END (ECM WAS DEFECTIVE)