JLG 340AJ Service Manual - Manual (Page 305)

SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-61
JIB LIFT UP VALVE – SHORT TO
BATTERY 3416 The Platform Module detects a short to battery at the Jib Lift Up Valve
output and reports it to the Ground Module. Jib Lift Up and Flow Control
Valve outputs are disabled; Jib
Lift Down 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.
JIB LIFT UP VALVE – SHORT TO
GROUND 3417 The Platform Module detects a short to ground at the Jib Lift Up Valve
output and reports it to the Ground Module. Jib Lift Up output is disabled;
Jib 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.
JIB LIFT DOWN VALVE – OPEN
CIRCUIT 3418 The Platform Module detects an open circuit at the Jib Lift Down
Valve output and reports it to the Ground Module. Jib Lift 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.
JIB LIFT DOWN VALVE – SHORT
TO BATTERY 3419 The Platform Module detects a short to battery at the Jib Lift Down
Valve output and reports it to the Ground Module. Jib Lift Up and Down outputs
are disabled. 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.
JIB LIFT DOWN VALVE – SHORT
TO GROUND 3420 The Platform Module detects a short to ground at this output and
reports it to the Ground Module. Jib Lift Up and Down 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.
FUEL SENSOR SHORT TO BAT-
TERY 431 Ground Module fuel sensor input (J2-25) detects a voltage higher
than 2.50 volts The Control System shuts down
all fuel level indicators in Plat-
form and Ground stations. Disconnect fuel sender and ver-
ify resistance readings can
range from approximately
30ohms (full) to 240ohms
(empty). If not, replace sender.
With fuel sender connected,
backprobe J2-25 and verify
voltage range from approxi-
mately 0.5V to 2.3V. Trouble-
shoot wiring or connections.
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