The Fleet Management Systems Interface (FMS) is a standard interface to vehicle
data of commercial vehicles. The six European manufacturers Daimler, MAN, Scania,
Volvo (incl. Renault), DAF trucks and IVECO have developed the so called FMS-Standard
in 2002 to make manufacturer independent applications for telematics possible.
The following data are broadcasted at the FMS interface:
· Vehicle speed (wheel based)
· Vehicle speed (from tachograph)
· Clutch switch (on/off)
· Break switch (on/off)
· Cruise control (on/off)
· PTO (Status/Mode)
· Accelerator pedal position (0–100 %)
· Total fuel used (litre since life time)
· Fuel level (0–100 %)
· Engine speed
· Axle weight (kg)
· Total engine hours (h)
· FMS-Standard Software Version (supported modes)
· Vehicle identification number (ASCII)
· Tachograph information
· High resolution vehicle distance
· Service distance
· Engine coolant temperature
With Version 2 (since 2011):
· Ambient air temperatur
· Driver indentification (1,2)
· Fuel rate, Instantaneous fuel economy
The data are coded according SAE J 1939. The repetition rate of the data is
between 20ms (e.g. engine speed) and 10 sec. (e.g. vehicle identification number).
With the FMS-Standard it is now possible to have manufacturer independent applications
and evaluations of the data.
The amount of data is dependent on the manufacturer and model of the vehicle
and might be different. If some data are not available at the interface they
are marked as not available.
According a note from the truck manufacturers the FMS-Standard is seen as a
world wide standard. A direct connection to the internal vehicle bus system
is not permitted by the truck manufacturers and could lead to the loss of warranty.
Meanwhile some manufacturers are quite restrictive in their workshops and cut
all unknown connections to the internal bus system
According ACEA more than 350.000 vehicles were fitted with a FMS-Standard Interface
in the year 2010. The FMS-Standard was as well the base for the Bus-FMS-Standard
for buses and coaches which was published in the year 2004.