Tower Telescope Pvg Valve Wiring Incorrect; Trn Dual Cap Bad Transition - JLG 1250AJP Troubleshooting Manual

Note Pretest Instructions
1.351.2 Disconnect tower tele PVG
valve [X067]

1.352 TOWER TELESCOPE PVG VALVE WIRING INCORRECT

Flash Code: 4-5
Tower telescope PVG valve wiring incorrect. A different valve powered up during power up time for tower tele PVG valve or
the tower tele PVG valve powered up outside of the allotted PVG valve power up time. This could be due to a calibration or
wiring problem. The valves are located as follows: main lift at lower left with wire TAN 55-50, tower lift at top left (center of
three) with wire TAN 55-51, tower tele at top right with wire BROWN 55-50.
Note Pretest Instructions
1.352.1 Open hood covering the
main valve body. Locate the
LED's on the PVG valves.
1.352.2 Turn off machine. Discon-
nect Ignition On Relay
[X012] and tower tele PVG
valve [X067].

1.353 TRN DUAL CAP BAD TRANSITION

Flash Code: 8-4
Transport or Dual Capacity Bad Transition. The control system detected that the main boom length switches did not transi-
tion in the correct sequence based on the telescope command, as in Table 2-3. Switch States / Boom Length Regions on Pg.
179 and Figure 2-2. Dual Capacity / Transport Switch Mounting on Pg. 179. If in the 1000# mode of operation, the main tele-
scope function will be disabled. This could be caused by incorrect wiring to the main boom transport or dual capacity
switches or a hydraulic problem preventing the boom from telescoping in the direction commanded.
Note Pretest Instructions
1.353.1
1.353.2
1.353.3
1.353.4 Disconnect main tele retract
[X073] connector
3128411
SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Does TOWER TELESCOPE PVG VALVE COM-
MUNICATIONS fault appear?
Test
Turn on the machine while watching the LED's.
Do they start all off, then turn on in this order:
LEFT, CENTER, then RIGHT?
Is there a short between Ignition On Relay
socket 30 [X012.30.soc]and tower tele PVG
valve socket 2 [X067.2.soc]?
Test
Are there any faults for the DCAP Length
Switches [X052] & [X053], main boom trans-
port switches [X054] & [X055], MAIN IN... -
OR- MAIN OUT...?
Operate main boom telescope IN and OUT. Is
the response correct?
Does the hosing between the main valve -
main tele section and main tele cylinder match
the schematic in Figure 3-12. Hydraulic Sche-
matic - Boom Control - Sheet 1 of 2 on Pg.
258?
Does the fault MAIN IN OPEN CIRCUIT
appear?
1250AJP
Result Corrective Action
Yes Replace tower tele PVG valve [X067] actuator
No Reprogram/replace ground module
Result Corrective Action
Yes Calibrate boom valves. See 5.4 Calibrating
Boom Valves on Pg. 296 for details.
No Go to step 1.222.2
Yes Repair/replace harness between Relay [X012]
and tower tele PVG valve [X067]
No Connect harnesses to the correct PVG valve as in
the description above. Then calibrate boom
valves. See 5.4 Calibrating Boom Valves on Pg.
296 for details.
Result Corrective Action
Yes Troubleshoot them first
No Go to step 1.353.2
Yes Go to step 1.353.5
No Go to step 1.353.3
Yes Go to step 1.353.4
No Correct hosing as needed
Yes Repair/replace main tele cylinder holding valve
No Harnesses for main tele retract [X073] and main
tele extend [X071] are swapped. Correct them.
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