DTC    B2799    Engine Immobiliser System

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DESCRIPTION

This DTC is output when one of the following occurs: 1) the ECM detected errors in its own communications with the immobiliser code ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the 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 present. If present, troubleshoot the certification ECU DTCs first.

DTC No.
DTC Detection Condition
Trouble Area
B2799
One of following conditions is met:
  1. Error in communication between ECM and immobiliser code ECU
  2. Error in communication lines
  3. Communication ID is different during communication with immobiliser code ECU
  1. Wire harness
  2. Immobiliser code ECU
  3. ECM

WIRING DIAGRAM


B106130E09


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Delete the DTC (Click here).

  1. Recheck for DTC.
    Result: 
    Result
    		Proceed to
    B2799 output reoccurs
    		A
    B2799 output does not reoccur
    		B



B
NORMAL
A


2.CHECK WIRE HARNESS (IMMOBILISER CODE ECU - ECM)
B111364E04

  1. Disconnect the L58 ECU connector.

  1. Disconnect the A7 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    L58- 5 (EFII) - A7-7 (IMO)
    		Below 1 Ω
    L58-6 (EFIO) - A7-6 (IMI)
    		Below 1 Ω
    L58-5 (EFII) or A7-7 (IMO) - Body ground
    		10 kΩ or higher
    L58-6 (EFIO) or A7-6 (IMI) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK OPERATION OF IMMOBILISER CODE ECU

  1. After replacing the immobiliser code ECU with a normal one, check that the engine starts.

    OK:
    Engine starts.



NG
REPLACE ECM
OK

REPLACE IMMOBILISER CODE ECU