JLG G12-55A AccuPlace Service Manual - Manual (Page 199)

9.81 G10-55A & G12-55A AccuPlace
Electrical System
LIFT VALVE COIL
2 – SHORT TO
BATTERY 4549 Lift valve controller detects
uncommanded current in
feedback circuit. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect Lift V2 coil connection, cycle
power, and verify that fault changes to
DTC 4548 (open circuit); then check the
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 LIFT V2 RTN pin
from the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the LIFT 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.
LIFT VALVE COIL
3 – SHORT TO
BATTERY 4551 Lift valve controller detects
uncommanded current in
feedback circuit. Y Check for continuity through this circuit.
Inspect wiring for physical damage.
Disconnect Lift V3 coil connection, cycle
power, and verify that fault changes to
DTC 4550 (open circuit); then check the
V3 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 V3 RTN pin
from the connector, reconnect the 12-pin
connector, and cycle power. If the fault still
remains, dislodge the LIFT V3 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)