Multi Pro 5800Page 8 − 58GeoLink Spray System
CAN−bus Terminator Resistors
System communication between the AGI−4 antenna,
X25 or X30 control console and ASC−10 auto section
controller is accomplished on a separate CAN−bus
communication system. The GeoLink Can−bus network
is not connected to the sprayer traction unit CAN−bus.
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 ends of the twisted pair of bus cables are two (2)
120 ohm terminator resistors.
The CAN−bus terminator resistors plug into the wire
harness. One of the terminator resistors is under the op-
erator seat and the second resistor is located near the
ASC−10 at the rear of the machine. The wire harness
connectors have a blue insert to identify the proper loca-
tion for the termination resistors.
Testing
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
2. Locate resistor assembly to be tested and remove
cable tie that secures resistor to wire harness. Unplug
the resistor from the wire harness for testing.
3. The terminator resistors (Fig. 67) can be tested using
a digital multimeter (ohms setting). There should be 120
ohms resistance between terminals A and B of the ter-
minator resistors. Terminal C is not used.
Figure 67
Terminator
A
B
C
Resistor
4. If testing determines that resistor is faulty, replace re-
sistor assembly.
5. If the resistor tests correctly and a circuit problem still
exists, check wire harness (see Electrical Schematic
and Wire Harness Drawings in Chapter 11 − Foldout
Drawings in this manual).
6. After resistor testing is complete, make sure that re-
sistor is fully seated into wire harness connector and se-
cured to the wire harness with a cable tie.
Fuses
Two in−line fuses are located in the GeoLink wire har-
nesses near the battery.
Fuse Identification and Function
In−line fuse (10 amp) protects the unswitched power
supply circuit for the X25 or X30 console and the AGI−4
GPS antenna.
P05 In−line fuse (50 amp) protects the unswitched
power supply circuit for the ASC−10 automatic section
controller.
Testing
Remove fuse from the fuse holder and check that fuse
has continuity across the fuse terminals. Use a multime-
ter to verify that 12 VDC exists at the terminals of the
fuse holder. Replace the fuse or continue to check the
wire harness connections as necessary.
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