DTC B2785: Communication Malfunction between ECUs Connected by LIN: Description

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The certification ECU (smart key ECU assembly) monitors communication between all the ECUs connected to the certification bus lines. When the certification ECU (smart key ECU assembly) detects errors in communication with all the ECUs connected to the certification bus lines at a set interval and 3 times in a row, DTC B2785 will be stored.

DTC No.	DTC Detection Condition	Trouble Area
B2785	Errors in LIN communication between ECUs and an open or short in communication lines LIN communication from the certification ECU (smart key ECU assembly) detects errors in communication 3 times in a row.	Certification ECU (smart key ECU assembly) Power management control ECU Transmission control ECU assembly ID code box (immobilizer code ECU)*1 Wire harness or connector

*1: for Canada