DTC B2799: Engine Immobilizer System Malfunction (TO 12/2010): Description

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

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 when 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 Code	DTC Detection Condition	Trouble Area
B2799	One of the following conditions is met: Error in communication between ECM and ID code box Error in communication lines Communication ID is different between ID code box and ECM during communication	Wire harness ECM ID code box