JLG G12-55A AccuPlace Service Manual - Manual (Page 200)

Electrical System
9.82 G10-55A & G12-55A AccuPlace
LIFT VALVE COIL
4 – SHORT TO
BATTERY 4553 Lift valve controller detects
uncommanded current in
feedback circuit. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect Lift V4 coil connection, cycle
power, and verify that fault changes to
DTC 4553 (open circuit); then check the
V4 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 LIFT V4 RTN pin
from the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the LIFT V4 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.
TELESCOPE
VALVE COIL 1 –
SHORT TO
BATTERY 4555 Tele valve controller detects
uncommanded current in
feedback circuit. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect TELE V1 coil connection,
cycle power, and verify that fault changes
to DTC 4554 (open circuit); then check the
V1 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 TELE V1 RTN pin
from the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the TELE V1 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.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)