Yanmar Engine Electronic Control Unit (Ecu); Yanmar Engine Electrical Components; Can-Bus Communications - Toro Groundsmaster 360 Service Manual

Yanmar Engine Electronic Control Unit (ECU)

Yanmar Engine Electrical Components

CAN-bus Communications

Electrical System: General Information
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1. Engine Electronic Control Unit (ECU)
The Groundsmaster 360 machines use an electronic control unit (ECU) for
engine management and to communicate with the TEC and InfoCenter display
on the machine. If you must disconnect the engine ECU for any reason, ensure
that the key switch is in the O
30 seconds before disconnecting the engine ECU.
When servicing or troubleshooting the engine electrical components use the
Yanmar Engine Service Manual and Troubleshooting Manual. Contact your Toro
distributor for additional engine troubleshooting assistance.
The TEC, Yanmar engine ECU, and InfoCenter display used on the
Groundsmaster 360 machines 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 machine 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 on the machine.
The 2 specially designed, twisted cables form the bus. These wires provide the
data pathways between the TEC, Yanmar engine 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.
The CAN-bus link controls each of the components that requires only 4 wires
to operate and communicate to the system: CAN High, CAN Low, B+ (power),
and ground.
Figure 161
position with the key removed for a minimum of
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