DTC    B2799    Engine Immobiliser System Malfunction

for Preparation Click here


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; 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the ID code box and ECM is different and an engine start is attempted.

HINT:
Before troubleshooting this DTC, make sure that no certification ECU DTCs are present. If present, troubleshoot the certification ECU DTCs first.


DTC No.
DTC Detection Condition
Trouble Area
B2799
One of the following conditions is met:
  1. Error in communication between ECD or ECM and ID code box
  2. Error in communication lines
  3. Communication ID is different between ID code box and ECD or ECM during communication
  1. Wire harness or connector
  2. ECM
  3. ID code box

WIRING DIAGRAM


B216010E04


INSPECTION PROCEDURE

NOTICE:
  1. If the ID code box is replaced, register the ECU code and ECU communication ID.
  2. If the ECM is replaced, register the ECU communication ID.

1.RE-REGISTER ECU COMMUNICATION ID

  1. Re-register the ECU communication ID.


NEXT


2.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Recheck for DTCs (Click here).

    OK:
    B2799 output does not recur.



NG
Go to step 3
OK

END (ECU COMMUNICATION ID IS DEFECTIVE) 

3.CHECK CONNECTOR CONNECTION CONDITION

  1. Turn the engine switch off.

  1. Check that the connectors are properly connected to the ECD or ECM and the ID code box.

    OK:
    Connectors are properly connected.



NG
CONNECT CONNECTORS PROPERLY
OK


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

  1. Disconnect the ID code box connector.



  1. Disconnect the ECM connector.


    B216009E01


    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to ID Code Box)
    		*2
    		Front view of wire harness connector
    (to ECM)
    *3
    		for 1KR-FE and 1NR-FE
    		*4
    		for 1ND-TV

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

    1. for 1ND-TV

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D30-5 (EFII) - A19-74 (IMO)
      		Always
      		Below 1 Ω
      D30-6 (EFIO) - A19-77 (IMI)
      		Always
      		Below 1 Ω
      D30-5 (EFII) - Body ground
      		Always
      		10 kΩ or higher
      D30-6 (EFIO) - Body ground
      		Always
      		10 kΩ or higher

    2. for 1KR-FE

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D30-5 (EFII) - A18-10 (IMO)
      		Always
      		Below 1 Ω
      D30-6 (EFIO) - A18-11 (IMI)
      		Always
      		Below 1 Ω
      D30-5 (EFII) - Body ground
      		Always
      		10 kΩ or higher
      D30-6 (EFIO) - Body ground
      		Always
      		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE ECM

  1. Replace the ECM.

    1. for 1ND-TV (Click here).
    2. for 1KR-FE (Click here).
    3. for 1NR-FE (Click here).


NEXT


6.REGISTER ECU COMMUNICATION ID

  1. Register the ECU communication ID.


NEXT


7.CHECK DTC OUTPUT

  1. Clear the DTCs (Click here).

  1. Recheck for DTCs (Click here).

    OK:
    B2799 output does not recur.



NG
REPLACE ID CODE BOX
OK

END (ECM IS DEFECTIVE)