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

CAN−bus Termination Resistor
Termination Resistor Test
Electrical System: Component Testing
Termination
Resistor
g276034
System communication between electrical components on Groundsmaster
4500−D and 4700−D machines is accomplished on a CAN−bus communication
system. Two (2) specially designed, twisted cables form the bus for the network
used on the machine. These wires provide the data pathways between machine
components. At the end of the twisted pair of bus cables near the InfoCenter
display is a 120 ohm termination resistor.
The CAN−bus termination resistor plugs into the platform wire harness in the
console arm. The resistor can be accessed by removing the cover plate on the
right side of the console arm. The wire harness connector has a blue insert to
identify the proper location for the termination resistor.
Note: The Groundsmaster 4500−D and 4700−D engine ECU includes the
second CAN−bus system termination resistor. This resistor cannot be accessed
for testing.
Note: Refer to Appendix A (page A–1)
resistor location and wire connections.
The termination resistor is required for proper electrical system
operation.
The termination resistor
(ohms setting). There should be 120 ohms resistance between terminals A and B
of the termination resistor. There is not a terminal in cavity C on Groundsmaster
4500−D and 4700−D machines.
B
Figure 222
for additional information on termination
IMPORTANT
(Figure 222) can be tested using a digital multimeter
Page 6–62
A
C
Groundsmaster ® 4500-D/4700-D
19245SL Rev A