Can--Bus Termination Resistor - Toro Groundsmaster 4500-D Service Manual

CAN- -bus Termination Resistor
System communication between electrical components
on Groundsmaster 4500--D and 4700--D machines is
Termination
A
B
accomplished on a CAN--bus communication system.
Resistor
Two (2) specially designed, twisted cables form the bus
for the network used on the machine. These wires pro-
vide the data pathways between machine components.
At the end of the twisted pair of bus cables near the In-
foCenter display is a 120 ohm termination resistor.
The CAN--bus termination resistor plugs into the plat-
C
form wire harness in the control arm. The resistor can be
accessed by removing the cover plate on the right side
Figure 59
of the control arm. The wire harness connector has a
blue insert to identify the proper location for the termina-
tion resistor.
NOTE: The Groundsmaster 4500--D and 4700--D en-
gine ECU includes the second CAN--bus system termin-
ation resistor. This resistor cannot be accessed for
testing.
NOTE: Refer to the Electrical Schematics and Wire
Harness Drawings in Chapter 9 -- Foldout Drawings for
additional information on termination resistor location
and wire connections.
IMPORTANT: The termination resistor is required
for proper electrical system operation.
Termination Resistor Test
The termination resistor (Fig. 59) can be tested using a
digital multimeter (ohms setting). There should be 120
ohms resistance between terminals A and B of the ter-
mination resistor. There is not a terminal in cavity C on
Groundsmaster 4500--D and 4700--D machines.
Electrical System Page 5 - - 48 Groundsmaster 4500--D/4700--D