Toro Pro Force 44552, Service Manual

Page: 58 / 134

CAN-bus Communications
The Toro Electronic Controller (TEC) and the Toro Wireless Modules (TWMs)
used on wireless controlled Pro Force Debris Blowers (Models 44552, 44552TE,
and 44553) communicate with each other on a Controller Area Network (CAN)
bus system. Using this network integrates all the different electrical components
of the machine and brings 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 to be significantly reduced.
Each of the components that is controlled by the CAN bus network only needs
four (4) wires to operate and communicate to the system: CAN High, CAN Low,
power and ground. The key switch needs to be in the RUN or START position
for the components on the network to be activated.
Two specially designed, twisted wires form the CAN bus. These wires provide
the data pathways between the components on the network. The engineering
term for these cables are CAN High and CAN Low. The CAN bus wires are either
red/white or yellow (CAN-High) and black/white or green (CAN Low). At each
end of the twisted pair of bus cables is a 120 ohm termination resistor; refer to
CAN bus Terminator Resistors (page 5–27) .
The can bus is incorporated into the machine wire harness of all model 44552,
44552TE, 44553, and 44554 machines. Only machines with wireless remote
control (model 44552, 44552TE, and 44553) have components that use the
CAN bus for communication.
The Toro DIAG electronic control diagnostics service system is available to
Authorized Toro Distributors to support machine fault diagnosis and maintenance
services of the machine electrical control devices. The Toro DIAG connector is
located on the left side of the machine control tower.
g278232
Figure 13
1. Machine control tower 3. Toro DIAG connector
2. Connector cover
Electrical System: General Information Page 5–4 Pro Force® Debris Blower
18237SL Rev A