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SECTION 6 - TROUBLESHOOTING
Code 27 - Auxiliary #2 - Disconnected
Check For These Obvious Conditions First:
• Is machine equipped with a component on the Auxiliary #2 circuit.
STEP
1.
Is machine equipped with a component on the Auxiliary #2 circuit.
2.
At the Ground Control Module enter the programming mode, check if the
Auxiliary #2 open circuit detection is enabled.
3.
Check voltage at the P1 connector on the Ground Control Module between
pin-8 and pin-1. Is reading within specification?
4.
Remove the wire terminals at the Aux. #2 component, check continuity of
each of the wires from pins-8 and 1 on the P1 connector to the Aux. #2
component.
Code 28 - Reserved
Code 29 - Reserved
Code 30 - Traction Module - No Communication with Ground Control Module
Check For These Obvious Conditions First:
• Check if the communications cable connections, P5 connector on the Ground Control Module and round plug on the
Traction Control Module are seated properly in their sockets at each end.
• Check the Positive (+) (RED) and Negative (–) (BLACK) power cable connections from the Ground Control Module to the
Traction Control Module are tight and secure at both ends.
Table 6-32. Code 30 - Traction Module - No Communication with Ground Control Module
STEP
1.
Check the voltage reading at the main power Positive (+)/Negative (–)
cable connection on the Traction Control Module.
2.
Remove the communications cable, P5 connector at the Ground Control
Module and round connector at the Traction Control Module. Check conti-
nuity of all three (3) wires in the communications cable from end to end. P5
- Pins 2, 3, and 4.
3.
With communications cable disconnected at both ends, check for continu-
ity between Pins 2, 3, and 4 of the P5 connector end.
4.
Plug the communications cable on the Traction Control Module to the round
socket on the opposite end of the module. Does this fix problem?
5.
Unplug the P5 connector at the Ground Control Module. Check voltage
between pins 2 (– lead-in) and 5 (+ lead-in). Is voltage within spec.
6-30
Table 6-31. Code 27 - Auxiliary #2 - Disconnected
ACTION
ACTION
– JLG Lift –
SPEC
YES
—
Go to Step 3
Default = NO
Disable It
2 - 4 V DC
Replace Ground
Control Module
—
Replace the
Component
SPEC
YES
24v DC
Go to Step 2
—
Go to Step 3
—
Repair or Replace
Wires
—
Done
4.5v DC
Done
NO
Got to Step 2
Replace Ground
Control Module
Go to Step 4
Repair or
Replace Wiring
NO
Repair or Replace
Positive (+) or
Negative (–) Cable
Repair or Replace
Wire(s)
Go to Step 4
Replace Traction
Control Module
Replace Ground
Control Module
3121231
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Troubleshooting
