Can−Bus Terminator Resistor - Toro Groundsmaster 5900 Series Service Manual

CAN−bus Terminator Resistor
Testing
Groundsmaster ® 5900 & 5910
16227SL Rev B
g288602
1. Termination resistor
System communication between electrical components on Groundsmaster
5900/5910 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.
All Groundsmaster 5900/5910 machines have two (2) 120 ohm termination
resistors. One resistor is located at the end of the twisted pair of bus cables
located in the operator control console (see
resistor can be accessed by removing the operator console side cover. The
wire harness connector has a blue insert to identify the proper location for the
termination resistor.
The second CAN−bus termination resistor is integrated into the Yanmar ECU
and can be tested as part of the CAN−bus wiring. The resistor is not replaceable
separately.
Note: Refer to the Electrical Schematics and Wire Harness Drawings in
Appendix A (page A–1)
locations and CAN−bus wiring.
The terminator resistor is required for proper electrical system
operation.
1. The terminator resistor in the Operator control console
tested separately using a digital multimeter (ohms setting). Locate resistor
and remove cable tie that secures resistor to wire harness. Unplug the
resistor from the wire harness for testing.
Note: The insulator wedge in the termination resistor is blue for identification
purposes. There also is a center keyway to prevent the termination resistor
from plugging into the wrong wire harness connector.
2. Use a digital multimeter (ohms setting) to measure the resistance value for
the termination resistor. There should be 120 ohms resistance between
terminals A and B. Terminal C is not used.
3. If testing determines that termination resistor is faulty, replace resistor.
4. After testing is complete, make sure that termination resistor is fully installed
into wire harness connector and secured to wire harness with cable tie.
B
1
2
Figure 256
2. Keyway
Appendix A (page
for additional information on the terminator resistor
IMPORTANT
Page 6–115
A
C
A–1)). The
(Figure 256) can be
Electrical System: Component Testing