Toro Groundsmaster 7210, Service Manual

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Yanmar Engine Electronic Control Unit (ECU)
g034741
Figure 136
1. Air cleaner 3. Battery
2. Electronic Control Unit (ECU)
The Yanmar engine that powers the Groundsmaster 7210 machine uses an
electronic control unit (ECU) for engine management and to communicate with
the InfoCenter display on the machine. If you must disconnect the engine ECU
for any reason, ensure that the key switch is in the O
FF
position with the key
removed for a minimum of 30 seconds before disconnecting the engine ECU.
Refer to
Chapter 3: Diesel Engine (page 3–1) .
Yanmar Engine Electrical Components
When servicing or troubleshooting the engine electrical components use
the
Engine Service Manual and Troubleshooting Manual . Contact your Toro
distributor for additional engine troubleshooting assistance.
CAN-bus Communications
The ECU and InfoCenter display used on the Groundsmaster 7210 machine
communicate with each other on a CAN bus system. This system allows the
traction unit to fully integrate all the different electrical components of the tractor
and bring them together as one. The CAN bus system reduces the number
of electrical components and connections that are used on the machine and
allows the number of wires in the wire harness to be significantly reduced. The
integration of the electrical functions also allows the InfoCenter display to assist
with the electrical system diagnostics.
The CAN identifies the controller area network that is used between the
controllers on the machine. The 2 specially designed, twisted cables form the
bus. These wires provide the data pathways between the controller (ECU) and
InfoCenter display used on the machine. The engineering term for these cables
are the CAN High and CAN Low. At the ends of the twisted pair of bus cables
are the 120-ohm terminator resistors.
Groundsmaster 7210 Page 5–7 Electrical System: General Information
16222SL Rev C