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Created page with "SAE J1708 is a standard used for serial communications between ECUs on a heavy duty. The hardware utilized are RS-485 transceivers wired for open collector operation through t..."
SAE J1708 is a standard used for serial communications between ECUs on a heavy duty. The hardware utilized are RS-485 transceivers wired for open collector operation through the use of a pullup and pulldown of the separate data lines.
With FMB640, J1708 functionality is used to read vehicle's Fuel Level and Fuel consumption.
Because J1708 is not a CAN BUS protocol, FMB640 CAN1 and CAN2 lines cannot be used to read J1708 information. FMB640 has a special J1708 Port, which utilizes RJ9 4P4C connector.
[[image:J1708.png]]
[[image:J1708_pinout.png]] <br>
==Software Configuration of FMB640 with J1708==
Firmware version: 00.00.11 or above
Configurator version: 0.13.35.29297 or above
J1708 configuration is done in FMS IO Tab.
[[image:J1708_config.gif]]
When J1708 is enabled as Fuel Level source, Fuel related data will be taken from J1708 line, FMS Fuel data will be ignored.
==Connection with Vehicle port==
J1708 connector is not supported by all vehicles. Only VOLVO, RENAULT and American truck manufacturers implement J1708 connector.
[[image:J1708_pinout1.png]]
Trucks utilizes Deutsch 9-PIN connector, which is used to connect FMB640 to J1708.
[[image:Deutsch_j1708.png]]
With FMB640, J1708 functionality is used to read vehicle's Fuel Level and Fuel consumption.
Because J1708 is not a CAN BUS protocol, FMB640 CAN1 and CAN2 lines cannot be used to read J1708 information. FMB640 has a special J1708 Port, which utilizes RJ9 4P4C connector.
[[image:J1708.png]]
[[image:J1708_pinout.png]] <br>
==Software Configuration of FMB640 with J1708==
Firmware version: 00.00.11 or above
Configurator version: 0.13.35.29297 or above
J1708 configuration is done in FMS IO Tab.
[[image:J1708_config.gif]]
When J1708 is enabled as Fuel Level source, Fuel related data will be taken from J1708 line, FMS Fuel data will be ignored.
==Connection with Vehicle port==
J1708 connector is not supported by all vehicles. Only VOLVO, RENAULT and American truck manufacturers implement J1708 connector.
[[image:J1708_pinout1.png]]
Trucks utilizes Deutsch 9-PIN connector, which is used to connect FMB640 to J1708.
[[image:Deutsch_j1708.png]]