General Information; Electrical Schematic And Wire Harness Drawings/Diagrams; Toro Electronic Controller (Tec); Can-Bus Communications - Toro Groundsmaster 4300-D Service Manual

General Information

Electrical Schematic and Wire Harness Drawings/Diagrams

Toro Electronic Controller (TEC)

CAN-bus Communications

Groundsmaster ® 4300-D
16226SL Rev C
The Operator's Manual provides information regarding the operation, general
maintenance, and maintenance intervals for your machine. Refer to the
Operator's Manual for additional information when servicing the machine.
Refer to the Electrical Schematic and Wire Harness Drawings/Diagrams in
Appendix A (page A–1).
The Groundsmaster 4300-D machines use a Toro Electronic Controller (TEC)
to manage the machine electrical functions. The controller is a microprocessor
controlled device that monitors the condition of various switches (inputs) and
then directs electrical power to control the appropriate machine functions
(outputs) based on the inputs. The status of inputs to the controller as well as
outputs from the controllers can be monitored with the InfoCenter display.
The TEC is located behind the control arm access cover next to the fuse block.
Before performing any welding on the machine, do the following to
prevent damaging the electrical system of the machine:
•
Disconnect the battery cables from the battery.
•
Disconnect the wire harness connector from the Toro Electronic Controller.
•
Disconnect the wire harness connectors from the engine ECU.
•
Disconnect the terminal connector from the alternator.
The TEC, Yanmar engine ECU, and InfoCenter display used on the
Groundsmaster 4300-D 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.
The terminator resistors at the ends of the bus cables are required
for proper electrical system operation.
IMPORTANT
IMPORTANT
Page 5–3 Electrical System: General Information