Can−Bus Termination Resistor - Toro Reelmaster 7000-D Service Manual

CAN−bus Termination Resistor
System communication between electrical components
on Reelmaster 7000−D machines is accomplished on a
CAN−bus communication system. Two (2) specially de-
signed, twisted cables form the bus for the network used
on the machine. These wires provide the data pathways
between machine components.
All Reelmaster 7000−D machines have a 120 ohm ter-
mination resistor at the end of the twisted pair of bus ca-
bles near the InfoCenter display (see seat and console
wire harness drawing in Chapter 10 − Foldout Drawings
in this manual). The resistor can be accessed by remov-
ing the cover plate on the right side of the control arm.
The wire harness connector has a blue insert to identify
the proper location for the termination resistor.
Machines with Kubota diesel engines have an additional
120 ohm termination resistor at the end of the twisted
pair of bus cables near the fuel pump (see Kubota en-
gine wire harness drawing in Chapter 10 − Foldout
Drawings in this manual). The resistor can be accessed
by raising the hood. The wire harness connector has a
blue insert to identify the proper location for the termina-
tion resistor.
NOTE: Refer to the Electrical Schematics and Wire
Harness Drawings in Chapter 10 − Foldout Drawings for
additional information on termination resistor locations
and wire connections.
IMPORTANT: The termination resistor is required
for proper electrical system operation.
Testing
1. The termination resistors (Fig. 66) can be individual-
ly tested using a digital multimeter (ohms setting). Lo-
cate resistor and remove cable tie that secures resistor
to wire harness. Unplug the resistor from the wire har-
ness for testing.
Electrical System
Termination
Resistor
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.
Page 6 − 60
B
Keyway
C
Figure 66
Reelmaster 7000−D
A