JLG G12-55A AccuPlace Service Manual - Manual (Page 204)

Electrical System
9.86 G10-55A & G12-55A AccuPlace
AUX VALVE COIL
2 – SHORT TO
BATTERY 4569 Fork valve controller detects
uncommanded current in
feedback circuit. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect AUX V2 coil connection, cycle
power, and verify that fault changes to
DTC 4568 (open circuit); then check the
AUX V2 coil connector/pins and wiring. If
the fault remains, remove the 12-pin
connector and verify the integrity of the
connector pins of both the controller and
harness, then dislodge AUX V2 RTN pin
from the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the AUX V2 pin,
reconnect, and cycle power. If the fault
persists, continue this pattern until all the
wires are dislodged. If the only wires
remaining are power and CAN Bus and a
STB fault still exists, then the fault lies
within the valve controller and
replacement is necessary.
PUMP MANIFOLD
VALVE – SHORT
TO BATTERY 4571 ISP controller detects
uncommanded current in
feedback circuit of the Pump
Manifold coil. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect PUMP MAN VLV coil
connection, cycle power, and verify that
fault changes to DTC 4570 (open circuit);
then check the PUMP MAN VLV coil
connector/pins and wiring. If the fault
remains, remove the 12-pin connector and
verify the integrity of the connector pins of
both the controller and harness, then
dislodge PUMP MAN VLV RTN pin from
the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the PUMP MAN VLV
signal pin, reconnect, and cycle power. If
the fault persists, continue this pattern
until all the wires are dislodged. If the only
wires remaining are power and CAN Bus
and a STB fault still exists, then the fault
lies within the controller and replacement
is necessary.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)