Testing the CAN bus (continued)
• A reading of more than 500k ohms indicates damage to the wiring of the
CAN side being tested; refer to
Appendix A (page A–1)
.
8. Connect the CAN bus isolation module to the machine wire harness after
testing.
Testing Devices (Nodes) on the CAN bus
DEVICE ID
DESCRIPTION
NORMAL RESISTANCE
(across
CAN + (HI) and CAN – (LOW)
terminals)
T1
Primary controller (TEC 5004)
70k to 75k ohms
T2, T3, T4
Cutting Unit motor controllers
150k to 160k ohms
T5
Traction 3 motor controller (optional)
150k to 160k ohms
T6 (04580)
Generator controller (model 04580
only)
150k to 160k ohms
T6 (04590)
Pre–charge controller (model 04590
only)
155k to 165k ohms
SC1
InfoCenter (KanTrak 1700)
2.25k to 2.75k ohms
SC2, SC3, SC4
Lift/Lower actuator controllers
150k to 160k ohms
SC5, SC6
Front traction motor controllers
2.75k to 3.00k ohms
SC7
Steering motor controller
75k to 80k ohms
SC8
Li-ion battery controller (model
04590)
50k to 55k ohms
1. Disconnect the machine wire harness at the device being tested. Check the
device and the harness connector for damage or corrosion and clean or
repair as necessary.
2. Use a multimeter (ohms setting) to measure and record the resistance
across the CAN + (HI) and CAN – (LOW) terminals of the device. Use to the
appropriate electrical schematic or wire harness diagram for your machine
in to determine the specific device terminals for testing; refer to
(page A–1)
.
• A reading of 0 to 50 ohms indicates the CAN terminals or the CAN
transceiver in the device have shorted together. Replace the device as
necessary.
• A reading of more than 500k ohms indicates the CAN terminals or the CAN
transceiver in the device have failed (open circuit). Replace the device as
necessary.
• A reading that falls within the resistance range listed for the device should
be tested further. Use a multimeter (ohms setting) to measure and record
the resistance across the CAN + (HI) terminal and an unpainted surface of
the metallic case of the device, and across the CAN – (LOW) terminal and
an unpainted surface of the metallic case of the device.
Note:
Devices with a non-metallic case can only be tested across the
CAN + (HI) and CAN – (LOW) terminals.
• A reading of less than 500k ohms indicates the CAN circuit has
shorted to ground. Replace the device as necessary.
• A reading of more than 500k ohms indicates the CAN circuit is open
and the device being tested is intact.
3. Connect the device to the machine wire harness after testing.
Electrical System: Testing the Electrical Components
Page 5–32
Greensmaster® eTriFlex 3360 and 3370
19239SL Rev B
