JLG G12-55A AccuPlace Service Manual - Manual (Page 191)

9.73 G10-55A & G12-55A AccuPlace
Electrical System
REAR
STABILIZER ONE
VALVE – OPEN
CIRCUIT 33350 Feedback voltage on UGM
pin J1-13 indicates STB
fault.
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.
REAR
STABILIZER TWO
VALVE – SHORT
TO BATTERY 33351 Feedback voltage on UGM
pin J1-2 indicates STB fault.
N Check for continuity through this circuit.
Inspect wiring for physical damage.
With the engine off, but controller power
on, and with the valve disconnected, the
open circuit voltage at the valve connector
should be around 8.0V or less. If not,
continue tracing the circuit back toward
UGM, making measurements to
determine where the STB exists. Once
isolated, perform continuity check to
narrow source of problem.
REAR
STABILIZER TWO
VALVE – SHORT
TO GROUND 33352 Voltage on UGM pin J1-2
while driving coil indicates
STG condition.
N Check for continuity through this circuit.
Inspect wiring for physical damage. The
low side of this coil should be within 1ohm
resistance to the negative battery
terminal.
REAR
STABILIZER TWO
VALVE – OPEN
CIRCUIT 33353 Feedback voltage on UGM
pin J1-2 indicates STB fault.
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.
ENGINE
TROUBLE CODE 437 Engine reports fault and
UGM initiates display of
SPN/FMI. N This fault provides an Suspect Parameter
Number/Failure Mode Identifier to be used
in conjunction with the engine
manufacturer's instructions.
BATTERY
VOLTAGE TOO
LOW – SYSTEM
SHUTDOWN 441 UGM measures battery
voltage < 9V for more than 3
seconds (excluding during
engine cranking). Y Recharge batteries or check for damaged
batteries.
BATTERY
VOLTAGE TOO
HIGH – SYSTEM
SHUTDOWN 442 UGM measures battery
voltage > 16V for more than
3 seconds (excluding during
engine cranking). Y May be due to improper battery charging
or incorrect voltage batteries being used.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)