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Groundsmaster 4000--D/4010--DPage 5 -- 4Electrical System
CAN--bus Communications
The two (2) TEC controllers, the Yanmar engine elec-
tronic control unit and the InfoCenter Display used on
the Groundsmaster 4000--D and 4010--D communicate
with each other on a CAN--bus system. Using this sys-
tem allows the traction unit to fully integrate all the differ-
ent electrical components of the tractor and bring them
together as one. The CAN--bus system reduces the
number of electrical components and connections used
on the machine and allows the number of wires in the
wire harness tobe significantlyreduced. Theintegration
of electricalfunctions also allows the InfoCenter Display
to assist with electrical system diagnostics.
CAN identifies the Controller Area Network that is used
between the controllers on the Groundsmaster. Two (2)
specially designed, twisted wires form the bus. These
wires provide the data pathways between the control-
lers (the TECcontrollersand theYanmar electroniccon-
trol unit) and the InfoCenter Display used on the
machine. The engineering term for these wires are CAN
High and CAN Low. At the ends ofthe twisted pair of bus
wires are 120 ohm termination resistors. One of these
resistors is included in the wire harness and the second
is inside the engine ECU.
Each of the components that is controlled by the CAN--
buslinkneedsonly four (4)wiresto operateandcommu-
nicate to the system: CAN High, CAN Low, B+ (power)
and ground. TheCAN--bus needsthe ignitionswitch ON
input for both the TEC and engine ECU to be activated.
Electrical Drawings
Theelectrical schematicsand wireharnessdrawingsfor
Groundsmaster 4000--D and 4010--D machines are lo-
cated in Chapter 10 -- Foldout Drawings.