Vehicle Data Source Overview
Vehicle Data Bus Connections
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MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
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Vehicle Data Source Overview
The Omnitracs mobile computing platform can use the J1708/J1587 and J1939 data buses,
as well as traditional sensors to monitor critical vehicle data:
• Traditional sensors are used on most pre-1992 trucks.
• J1708/J1587 data bus is used on most 1992–2009 trucks.
• J1708/J1587 and J1939 data buses are available on 2007–2010 trucks.
• J1939 will be the only data bus used on most trucks built after 2010.
These data inputs can be monitored on the vehicle data services (VDS) screens. The vehicle
data source makes this data available to specific applications on the MCP100.
J1939 Data Bus
Omnitracs applications only support 2007 and newer trucks with ECMs that support the SAE
J1939-71, Rev. Nov 2006 standard.
• High speed (250 Kb/sec) data bus.
• Uses a two-wire differential serial bus, which is a network backbone running throughout
the vehicle with several stubs connecting each ECM to the backbone.
J1708/J1587 Data Bus
• Low speed (9.6 Kb/sec), bi-directional data bus.
• Uses a two-wire differential serial bus, which runs throughout the vehicle.
Traditional Sensors
• Use traditional sensors if the truck does not have the J1708/J1587 or J1939 data bus. For
information on connecting traditional sensors, contact Omnitracs Customer Support.
