JLG 340AJ Service Manual - Manual (Page 296)

SECTION 6 - JLG CONTROL SYSTEM
6-52 – JLG Lift – 3121259
PLATFORM LEVEL UP VALVE –
SHORT TO GROUND 3382 The Ground Module detects a short to ground at the Platform Level
Up Valve output. Ground Module Platform Level
Up is disabled; Level Down
speed is limited to Creep. 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.
PLATFORM LEVEL UP VALVE –
OPEN CIRCUIT 3383 The Ground Module detects an open circuit at the Platform Level Up
Valve output. Platform Level speed is limited
to Creep. Check for a good connection at
the solenoid and for continuity
through this circuit. Inspect
wiring for physical damage.
Cycle power to clear the fault.
PLATFORM LEVEL UP VALVE –
SHORT TO BATTERY 3384 The Ground Module detects a short to battery at the Platform Level
Up Valve output. Ground Module Platform Level
Up, Level Down, and Flow Con-
trol Valve outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
PLATFORM LEVEL DOWN
VALVE – SHORT TO GROUND 3388 The Ground Module detects a short to ground at the Platform Level
Down Valve output. Ground Module Platform Level
Up and Down valve 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.
PLATFORM LEVEL DOWN
VALVE – OPEN CIRCUIT 3389 The Ground Module detects an open circuit at the Platform Level
Down Valve output. Platform Level speed is limited
to Creep. Check for a good connection at
the solenoid and for continuity
through this circuit. Inspect
wiring for physical damage.
Cycle power to clear the fault.
PLATFORM LEVEL DOWN
VALVE – SHORT TO BATTERY 3390 The Ground Module detects a short to battery at the Platform Level
Down Valve output. Ground Module Platform Level
Up, Level Down, and Flow Con-
trol Valve outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
TOWER LIFT UP VALVE –
SHORT TO GROUND 33106 The Ground Module detects a short to ground at the Tower Lift Up
Valve output. Ground Module Tower Lift Up
output is disabled; Tower Lift
Down speed is limited to Creep 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 UP VALVE – OPEN
CIRCUIT 33107 The Ground Module detects an open circuit at the Tower Lift Up 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.
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