Can-Bus Terminator Resistor - Toro Reelmaster 5410 Series Service Manual

CAN-bus Terminator Resistor

Testing the CAN-bus Terminator Resistor
Electrical System: Testing the Electrical Components
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1. CAN-bus terminator resistor
The system communication between the electrical components on the
Reelmaster machine is accomplished on a CAN-bus communication system.
The 2 specially designed, twisted cables form the bus for the network are used
on the machine. These wires provide the data pathways between the machine
components.
The 120 ohm CAN-bus terminator resistor plugs into the main wire harness in the
control arm. The resistor can be accessed by removing the left control arm cover.
On machines with a Kubota diesel engine, the second CAN-bus terminator
resistor plugs into the engine wire harness near the engine starter motor. The
engine wire harness connector has a blue insert to identify the proper location for
the terminator resistor.
On machines with a Yanmar diesel engine or Kubota gasoline engine, the
second CAN-bus terminator resistor is included in the engine ECU. This resistor
cannot be accessed for testing.
Note: The insulator wedge in the terminator resistor is blue for identification
purposes. There is also a center keyway to prevent the terminator resistor from
plugging into the wrong wire harness connector.
Note: Refer to the Electrical Schematic and Wire Harness Drawings/Diagrams
for additional information on the location of the terminator resistor and wire
connections.
The terminator resistor is required for proper electrical system
operation.
1. The CAN-bus terminator resistor
multimeter (ohms setting). Locate the CAN-bus terminator resistor and
remove the cable tie that secures the resistor to the wire harness. Unplug the
resistor from the wire harness for testing.
2. Use a digital multimeter (ohms setting) to measure the resistance value for
the CAN-bus terminator resistor. There should be 120 ohms resistance
between the terminals A and B. The terminal C is not used.
3. If the testing determines that the CAN-bus terminator resistor is damaged,
replace the CAN-bus terminator resistor.
Figure 279
2. Keyway
IMPORTANT
(Figure 279) can be tested using a digital
Page 7–114 Reelmaster ® 5410/5510/5610 Series
15216SL Rev C