Tower Lift Pvg Valve Internal Fault; Tower Lift Pvg Valve Location Improper; Tower Lift Pvg Valve Low Voltage - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.318 TOWER LIFT PVG VALVE INTERNAL FAULT

Flash Code: 4-5
Tower lift PVG valve internal fault. Hardware or software inside the tower lift PVG valve caused an error. There are no service-
able parts that cause this problem.
Note Pretest Instructions
1.318.1 Read faults
1.318.2

1.319 TOWER LIFT PVG VALVE LOCATION IMPROPER

Flash Code: 4-5
Tower lift PVG valve location improper. Tower lift PVG valve parameters entered into the incorrect valve. This could be due to
a calibration or wiring problem. The valve harnesses have one wire in it that is labeled with a number. The valves are located
as follows: main lift at lower left with wire TAN 55-50, tower lift at top left with wire TAN 55-51, tower tele at top right with wire
BROWN 55-50.
Note Pretest Instructions
1.319.1 Open hood covering the
main valve body. Locate the
LED's on the PVG valves.

1.320 TOWER LIFT PVG VALVE LOW VOLTAGE

Flash Code: 4-5
Tower lift PVG valve low voltage. Voltage powering the tower lift PVG valve fell below about 10 VDC. Increase system voltage
above 11 VDC to clear fault.
Note Pretest Instructions
1.320.1
1.320.2
1.320.3
1.320.4 Disconnect tower lift PVG
valve connector [X066].
Turn on machine.
1-150
Test
Are there any 6-6 communication faults?
Cycle machine power. Keep power off at least
20 seconds. Does fault still occur?
Test
Turn on the machine while watching the LED's.
Do they start off, then turn on, in order, LEFT,
CENTER, then RIGHT?
Test
Are either of the faults TOWER LIFT PVG
VALVE COMMUNICATIONS or BLAM CAN
COMMUNICATIONS LOST present?
Are the battery and battery connections good? Yes
Turn on machine and start engine. Is battery
voltage about 12 VDC and does system
appear to be working properly?
Is there about 12 VDC between tower lift PVG
valve socket 2 [X066.2.soc] and socket 3
[X066.3.soc]?
1250AJP
Result Corrective Action
Yes Troubleshoot those first
No Go to step 1.318.2
Yes Replace tower lift PVG valve actuator [X066]
No Troubleshooting complete
Result Corrective Action
Yes Calibrate boom valves. See 5.4 Calibrating
Boom Valves on Pg. 296 for details.
No Connect harnesses to the correct PVG valve
according to wires listed above in description.
Then calibrate boom valves and recheck. See
5.4 Calibrating Boom Valves on Pg. 296 for
details.
Result Corrective Action
Yes Troubleshoot them first.
No Go to step 1.320.2
Go to step 1.320.3
No Repair/replace as needed
Yes Go to step 1.320.4
No Repair charging and 12 VDC electrical power
generation system.
Yes Transient caused condition. If it occurs again
troubleshoot charging and 12 VDC electrical
power generation system.
No Go to step 1.320.5
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