DTC B2799-86: Engine Immobilizer System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [08/2016 - ]: Description

This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the certification ECU; 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the certification ECU 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 No.	DTC Detection Condition	Trouble Area
B2799-86	One of the following conditions is met: Error in communication between ECM and certification ECU Error in communication lines Communication ID is different between certification ECU and ECM during communication	Wire harness or connector ECM Certification ECU