FMM640 J1708 - Wiki Knowledge Base | Teltonika GPS

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1 Description
2 Software Configuration of FMM640 with J1708
3 Connection with Vehicle port

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Appearance move to sidebar hide From Teltonika Telematics Wiki Main Page > EOL Products > FMM640 > FMM640 Manual > FMM640 J1708

Description

SAE J1708 is a standard used for serial communications between ECUs on heavy-duty. The hardware utilized is RS-485 transceivers wired for open collector operation through the use of a pullup and pulldown of the separate data lines.

With FMM640, J1708 functionality is used to read vehicle's Fuel Level and Fuel consumption.

Because J1708 is not a CAN-BUS protocol, FMM640 CAN1 and CAN2 lines cannot be used to read J1708 information. FMM640 has a special J1708 Port, which utilizes an RJ9 4P4C connector.