JLG G12-55A AccuPlace Service Manual - Manual (Page 197)

9.79 G10-55A & G12-55A AccuPlace
Electrical System
PUMP MANIFOLD
VALVE – SHORT
TO GROUND OR
OPEN CIRCUIT 4570 ISP detects too large of an
error between coil drive
current and feedback.
Detected during startup or
during pump command. Y Inspect wiring for physical damage.
Check for continuity through this circuit.
On the 12-pin ISP controller connector,
verify that the PUMP MAN VLV wire in pin
3 and PUMP MAN VLV RTN in pin 10 are
properly seated, as well as the
connections on the Pump Manifold Valve
coil.
Current Command and Feedback values
may be monitored via the Analyzer under
Diagnostics/ISP to help with the
assessment.
LIFT RIGHT
ISOLATION
VALVE – SHORT
TO GROUND OR
OPEN CIRCUIT 4572 ISP detects too large of an
error between coil drive
current and feedback.
Detected during startup or
Lift Down. Y Inspect wiring for physical damage.
Check for continuity through this circuit.
On the 12-pin ISP controller connector,
verify that the RT LIFT ISOL VLV wire in
pin 4 and RT LIFT ISOL VLV RTN in pin 9
are properly seated, as well as the
connections on the Right Lift Isolation
Valve coil.
Current Command and Feedback values
may be monitored via the Analyzer under
Diagnostics/ISP to help with the
assessment.
LIFT LEFT
ISOLATION
VALVE – SHORT
TO GROUND OR
OPEN CIRCUIT 4574 ISP detects too large of an
error between coil drive
current and feedback.
Detected during startup or
Lift Down. Y Inspect wiring for physical damage.
Check for continuity through this circuit.
On the 12-pin ISP controller connector,
verify that the LT LIFT ISOL VLV wire in
pin 5 and LT LIFT ISOL VLV RTN in pin 8
are properly seated, as well as the
connections on the Left Lift Isolation Valve
coil.
Current Command and Feedback values
may be monitored via the Analyzer under
Diagnostics/ISP to help with the
assessment.
Help Message
1
DTC Fault Condition
(for configurable items,
fault applies only if
configured)
Fault
Requires
AccuPlace
Reset?
Action(s)