Boom Length Sensor #1 Out Of Range Low; Boom Length Sensor #2 Out Of Range High; Boom Length Sensor #2 Out Of Range Low; Boom Prevented - Drive Selected - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.53 BOOM LENGTH SENSOR #1 OUT OF RANGE LOW

Flash Code: 8-4
Tower boom length sensor #1 out of range low. The BLAM module J3 input [X088.8] for tower boom length sensor #1 (Top)
is reading under 0.007 volts. See 1.367 TWR LENGTH SENSOR ONE VALUE OUT OF RANGE LOW on Pg. 168.

1.54 BOOM LENGTH SENSOR #2 OUT OF RANGE HIGH

Flash Code: 8-4
Tower boom length sensor #2 out of range high. The BLAM module J3 input [X088.11] for tower boom length sensor #2
(Bottom) is reading over 4.95 volts. See 1.368 TWR LENGTH SENSOR TWO VALUE OUT OF RANGE HIGH on Pg. 169.

1.55 BOOM LENGTH SENSOR #2 OUT OF RANGE LOW

Flash Code: 8-4
Tower boom length sensor #2 out of range low. The BLAM module J3 input [X088.11] for tower boom length sensor #2 (Bot-
tom) is reading under 0.007 volts. See 1.369 TWR LENGTH SENSOR TWO VALUE OUT OF RANGE LOW on Pg. 170.

1.56 BOOM PREVENTED - DRIVE SELECTED

Flash Code: 2-5
Boom prevented - drive selected. Notification that ANALYZER ⇒ MACHINE SETUP ⇒ FUNCTION CUTOUT is set to BOOM
CUTOUT and the machine is driving above elevation and a boom function is being attempted. Operate drive and boom sep-
arately or change the machine setup.

1.57 BOOM SENSORS NOT CALIBRATED

Flash Code: 9-9
Boom sensors not calibrated. The Boom sensors require calibration. See 5.1 Calibration Instructions on Pg. 289, Table 5-2.
Calibrations Listed by Service Action on Pg. 289 and 5.8 Boom Sensor Calibration on Pg. 309 for more details. The machine
will be in electrical retrieval mode until in transport position. Then, tower path control, controlled angle, auto main lift, main lift
up, and tower lift up will be disabled.
Note Pretest Instructions
1.57.1 Read active faults
1.57.2 Perform boom sensor cali-
bration.

1.58 CAN DONGLE ATTACHED - HYDRAULICS NOT RESTRICTED

Flash Code: 2-5
CAN dongle attached - hydraulics not restricted. Notification the production dongle control tool is connected.

1.59 CHASSIS CAN COMMUNICATIONS LOST

Flash Code: 6-6
Chassis CAN communications lost. The system cannot communicate with the chassis module. This may be due to wiring
problems between the chassis and ground module.
Note Pretest Instructions
1.59.1 Check fault log for other
modules having lost com-
munication
1-58
Test
Are there any boom sensor faults?
Does machine calibrate successfully?
Test
Have most modules lost communications?
1250AJP
Result Corrective Action
Yes Troubleshoot those faults first
No Go to step 1.57.2
Yes Troubleshooting complete
No Troubleshoot in accordance with calibration fault
Result Corrective Action
Yes See 1.93 EXCESSIVE CAN BUS COMMUNICA-
TION ERRORS on Pg. 73
No Go to step 1.59.2
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