JLG 340AJ Service Manual - Manual (Page 297)

SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-53
TOWER LIFT DOWN VALVE –
SHORT TO GROUND 33109 The Ground Module detects a short to ground at the Tower Lift Down
Valve output. Ground Module Tower Lift Up
and Down outputs are dis-
abled. Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
TOWER LIFT DOWN VALVE –
OPEN CIRCUIT 33110 The Ground Module detects an open circuit at the Tower Lift Down
Valve output. The Ground Module suspends
Tower Lift Up/Down com-
mands and reverts to Open
Loop Current control for Tower
Lift; Tower Lift speed is limited
to Creep after both Tower Lift
Up/Down controls have been
returned to neutral and
machine is not Enabled Check for a good connection at
the solenoid and for continuity
through this circuit. With the
solenoid disconnected, an
open circuit voltage of nearly
8.0V exists on the Ground Mod-
ule output pin for diagnostic
purposes. Inspect wiring for
physical damage. Cycle power
to clear the fault.
SWING RIGHT VALVE – SHORT
TO GROUND 33118 The Ground Module detects a short to ground at the Swing Right
Valve output. Swing Left and Right outputs
are disabled. Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
SWING RIGHT VALVE – OPEN
CIRCUIT 33119 The Ground Module detects an open circuit at the Swing Right Valve
output. The Ground Module suspends
Swing Left/Right commands
and reverts to Open Loop Cur-
rent control for Swing; Swing
speed is limited to Creep after
both Swing Left/Right controls
are returned to neutral and
machine is not Enabled Check for a good connection at
the solenoid and for continuity
through this circuit. With the
solenoid disconnected, an
open circuit voltage of nearly
8.0V exists on the Ground Mod-
ule output pin for diagnostic
purposes. Inspect wiring for
physical damage. Cycle power
to clear the fault.
TELESCOPE IN VALVE – SHORT
TO BATTERY 33120 The Ground Module detects a short to battery at the Telescope In
Valve output. Ground Module Telescope In,
Telescope Out, and Flow Con-
trol Valve outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
SWING LEFT VALVE – SHORT
TO GROUND 33122 The Ground Module detects a short to ground at the Swing Left Valve
output. Ground Module Swing Left and
Right outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
TELESCOPE OUT VALVE –
SHORT TO BATTERY 33123 The Ground Module detects a short to battery at the Telescope Out
Valve output. Ground Module Telescope In,
Telescope Out, and Flow Con-
trol Valve outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
Table 6-10. 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