JLG G12-55A AccuPlace Service Manual - Manual (Page 186)

Electrical System
9.68 G10-55A & G12-55A AccuPlace
RIGHT
STABILIZER
JOYSTICK – OUT
OF RANGE LOW 2367 The Right Stabilizer joystick
voltage has reached the low
error limit defined in
Personalities. N Center joystick and check to see if a power
cycle will clear DTC.
If not, swap connector between Right
Stabilizer joystick and an adjacent Mini
Joystick to determine whether the Left
Stabilizer joystick is faulty. If the joystick is
fine, focus troubleshooting efforts on the
connector and wiring as detailed in DTC
2129.
Check continuity of wiring connections.
FUNCTIONS
LOCKED OUT –
CONSTANT
DATA VERSION
IMPROPER
2
2520 UGM constant data version
is incompatible. N Requires reprogramming of UGM.
MULTIPLE LIFT
VALVE FAULTS –
LIFT MOTION
PREVENTED 2540 A Lift Valve fault coexists
with either a Left or Right
Isolation Valve fault. Y Multiple faults have occurred.
Begin by first troubleshooting fault
associated with Isolation Valve Faults
(DTCs 4549 or 4551).
MODEL
CHANGED –
HYDRAULICS
SUSPENDED –
CYCLE EMS? 259 Machine model has been
changed. N Cycle power.
LEFT
STABILIZER
DOWN VALVE –
OPEN CIRCUIT
2
33222 Voltage on UGM pin J2-20
indicates solenoid
disconnected.
N Check for continuity through this circuit.
Inspect wiring for physical damage.
Note: An open circuit voltage of nearly
8.0V exists on this UGM pin for circuit
diagnostic purposes.
LEFT
STABILIZER
DOWN VALVE –
SHORT TO
BATTERY 33223 Voltage on UGM pin J2-20
indicates STB fault.
N Check for continuity through this circuit.
Inspect wiring for physical damage.
Note: The wire on the low side of the coil
provides current feedback to J3-14 and
can open circuit the electrical path to
ground to prevent current flow through the
coil (to prevent function movement).
LEFT
STABILIZER
DOWN VALVE –
SHORT TO
GROUND 33224 Loss of current feedback on
UGM pin J3-14 while driving
coil via UGM pin J2-20.
N Check for coil damage or a shorting
condition in this circuit.
Inspect wiring for physical damage.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)