JLG 340AJ Service Manual - Manual (Page 288)

SECTION 6 - JLG CONTROL SYSTEM
6-44 – JLG Lift – 3121259
FUNCTION PROBLEM - TOWER
LIFT DOWN PERMANENTLY
SELECTED 2258 The machine is in Platform mode and the tower lift switch is sending
a continual tower lift down signal. Machine enters Creep Mode
and Tower Lift Up and Down
prohibited. Release the footswitch and
return the telescope switch to
neutral. Actuate switch while
monitoring state changes
under appropriate menu in
DIAGNOSTICS-->OPER CON-
TROLS on Analyzer.Replace the
switch if faulty.
FUNCTION PROBLEM - PLAT-
FORM LEVEL UP PERMA-
NENTLY SELECTED 2262 The machine is in Platform mode and the platform level up switch is
sending a continual level up signal. Machine enters Creep Mode
and Platform Level Up and
Down prohibited. Release the footswitch and
return the platform level switch
to neutral. Actuate switch
while monitoring state
changes under appropriate
menu in DIAGNOSTICS-->OPER
CONTROLS on Analyzer.
Replace the switch if faulty.
FUNCTION PROBLEM - PLAT-
FORM LEVEL DOWN PERMA-
NENTLY SELECTED 2263 The machine is in Platform mode and the platform level down switch
is sending a continual level up signal. Machine enters Creep Mode
and Platform Level Up and
Down prohibited. Release the footswitch and
return the platform level switch
to neutral. Actuate switch
while monitoring state
changes under appropriate
menu in DIAGNOSTICS-->OPER
CONTROLS on Analyzer.
Replace the switch if faulty.
FUNCTION SWITCHES FAULTY -
CHECK DIAGNOSTICS/BOOM 234 The Ground Module detects one of the following conditions:
The machine is in Ground Mode and both direction inputs of the
following boom controls are energized at the same time: Engine
Start/Aux, Telescope, Platform Level, Platform Rotate, Jib Lift,
Tower Lift, Lift, or Swing.
The machine is in Platform Mode and both direction inputs of the
following boom controls are energized at the same time: Engine
Start/Aux, Telescope, Platform Level, Platform Rotate, Jib Lift,
Tower Lift
The boom function that is trig-
gering the fault is disabled.
NOTE: If Engine Start/Aux
Power is at fault, Emer-
gency Descent will still be
permitted. Check the switch for the appli-
cable function. Actuate switch
while monitoring state
changes under appropriate
menu in DIAGNOSTICS-->OPER
CONTROLS on Analyzer.
Replace if faulty.
FUNCTION SWITCHES LOCKED
- SELECTED BEFORE AUX
POWER 235 The Ground Module detects one of the following conditions:
The machine is in Ground Mode, the engine is stopped, and the
ground Auxiliary Descent switch is selected after a Ground con-
trol switch has been selected.
The machine is in Platform Mode, the engine is stopped, and the
platform Auxiliary Descent switch is selected after a Platform
control switch has been selected.
Emergency Descent mode is
disabled Release all function switches.
Activate the Auxiliary Descent
switch before any other appli-
cable control switches or start
the engine
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