JLG 340AJ, Service And Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-63
ROD SIDE PRESSURE SENSOR –
FAULTY 23217* After the operator demand is complete (enable valve de-energized
after a tower lift down or boom lift down) and footswitch still active,
the flow control are directional valves are appropriately held for 3sec to
check the tower lift enable valve. This diagnostic is run at the same
time as DTC 33563
If Rod side pressure is greater than 1800psi or less than 1000psi, fault is
detected
Fault, once triggered, is maintained within a given key-cycle
Machine will be trapped in transport Check relief setting or pressure
transducer
*This fault will not be active if Boom Sensors are not calibrated, a subsequent function is activated, any retrieval mode is active, any valves or sensors involved in the diagnostics are not
healthy, ground mode is selected or dump valve is energized for less than 3sec after a function is complete
MODEL CHANGED – HYDRAU-
LICS SUSPENDED – CYCLE EMS 259 The MACHINE SETUP

MODEL is changed using the analyzer All of the boom, drive, and steer
functions are disabled; the
engine will be shut down. Cycle Power.
GENERATOR MOTION CUTOUT
ACTIVE 2513 MACHINE SETUP

GEN SET = BELT DRIVE and GEN SET CUTOUT =
MOTION CUTOUT
The machine is being operated in Platform mode and the footswitch
and Generator Enable switch are engaged while any of the config-
ured boom, drive, or steer functions are attempting to be activated.
All of the boom, drive, and steer
functions are disabled. Motion is no longer attempted
or generator is turned off.
BOOM PREVENTED – DRIVE
SELECTED 2514 The machine is set up to cut out boom functions when the drive or
steer is being operated. The machine is in the Out of Transport posi-
tion and the operator is operating a Drive or Steer function and
attempts to activate a boom function.
Note: DTC 2514 supercedes DTC 2518 if drive/steer and boom func-
tions are both active when the machine changes from Below Eleva-
tion to Above Elevation. All boom functions are dis-
abled. Stop operating any Drive or
Steer functions. Activate the
Boom function.
DRIVE PREVENTED – ABOVE
ELEVATION 2516 The machine is set up to cut out drive and steer when the boom is
above elevation. The machine is in the Out of Transport position. The
Control System senses the boom is above elevation and the operator
is attempting to activate Drive or Steer Disable Drive and Steer Place the machine in the trans-
port position before attempt-
ing to drive or steer.
DRIVE PREVENTED – TILTED &
ABOVE ELEVATION 2517 The machine is set up to cut out drive and steer when the chassis is
tilted and boom is above elevation. The machine is in the Out Of
Transport position. The Control System senses the chassis is tilted and
the operator is attempting to activate Drive or Steer Disable Drive and Steer Place the machine in the trans-
port position before attempt-
ing to drive or steer.
DRIVE PREVENTED – BOOM
SELECTED 2518 The machine is set up to cut out functions when the boom is being
operated. The machine is in the Out Of Transport position. The opera-
tor is operating a boom function and tries to activate the Drive or
Steer controls. Disable Drive and Steer Stop operating any boom func-
tions. Activate the Drive or
Steer function.
FUNCTIONS LOCKED OUT –
CONSTANT DATA VERSION
IMPROPER 2520 The Ground Module detects a mismatch between programmed sec-
tions of the processor memory. Disable all machine and engine
functions (i.e., command
engine shutdown and do not
permit start). Reprogram the software so
that the memory values match.
Cycle Power.
RUNNING AT CREEP - PLAT-
FORM LEVELED UNDER
2587
The control system has determined that the platform is leveled under
and is being considered to be in a loading/unloading position. Boom,
Tower, and Level Override functions will operate at creep speed.
Table 6-15. Fault Code Troubleshooting Information
Help Message DTC Condition Producing DTC
Control System Response or
Machine Condition
Corrective Action/
Operational Requirement
for Function Movement
and/or to Clear Fault