Dtc B2799 Engine Immobiliser System Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

RE-REGISTER ECU COMMUNICATION ID

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)

REPLACE TRANSPONDER KEY ECU ASSEMBLY

DTC B2799 Engine Immobiliser System Malfunction


DESCRIPTION

This DTC is output when the ECM detects errors in communication between the transponder key ECU and in the communication lines.
This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU and the ECM is different.
Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU. If there is any key code related DTC detected in the transponder key ECU, repair it first.

DTC No.
DTC Detection Condition
Trouble Area
B2799
Error in communication between ECM and transponder key ECU assembly, and in communication line
Communication ID is different during communication with transponder key ECU
  1. Wire harness
  2. Transponder key ECU assembly
  3. ECM

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 transponder key ECU assembly is replaced, register the key and ECU communication ID.
  1. If the ECM is replaced, register the ECU communication ID.
1.RE-REGISTER ECU COMMUNICATION ID

  1. Re-register the ECU communication ID between the transponder key ECU assembly and ECM.

  1. Check that the engine starts.

    OK:
    The engine starts.


OK
END
NG


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


  1. Disconnect the E15 ECU and A24*1 or A55*2 ECM connectors.


    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:
    2AZ-FE, 2GR-FE (RHD):
    Tester Connection
    		Condition
    		Specified Condition
    E15-12 (EFII) - A24-10 (IMO)
    		Always
    		Below 1 Ω
    E15-13 (EFIO) - A24-11 (IMI)
    E15-12 (EFII) - Body ground
    		10 kΩ or higher
    E15-13 (EFIO) - Body ground
    2GR-FE (LHD):
    Tester Connection
    		Condition
    		Specified Condition
    E15-12 (EFII) - A55-10 (IMO)
    		Always
    		Below 1 Ω
    E15-13 (EFIO) - A55-11 (IMI)
    E15-12 (EFII) - Body ground
    		10 kΩ or higher
    E15-13 (EFIO) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE TRANSPONDER KEY ECU ASSEMBLY

  1. After replacing the transponder key ECU assembly with a normally functioning transponder key ECU assembly, check that the engine starts.

    OK:
    The engine starts.


NG
REPLACE ECM
OK

END