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SECTION 6 - JLG CONTROL SYSTEM
6-72
– JLG Lift –
3121259
FLOW CONTROL VALVE –
SHORT TO GROUND
33316
The Ground Module detects a short to ground at the Flow Control
Valve output.
Ground Module Flow Control
Valve output is disabled; disal-
lows energization of valves for
Tele In/Out, Jib Up (permitted if
operating in Emergency
Descent mode), Level Up/
Down, or Rotate Right/Left.
Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
DRIVE FORWARD VALVE –
OPEN CIRCUIT
33317
The Ground Module detects an open circuit at the Drive Forward
Valve output.
The Ground Module suspends
Drive Forward/Reverse com-
mands and reverts to Open Cur-
rent loop control for Drive; Drive
speed is limited to Creep after
both Drive Forward/Reverse
controls have been returned to
neutral and the machine is not
Enabled.
Check for a good connection at
the solenoid and for continuity
through this circuit. With the
solenoid disconnected, an
open circuit voltage of nearly
8.0V exists on the Ground Mod-
ule output pin for diagnostic
purposes. Inspect wiring for
physical damage. Cycle power
to clear the fault.
DRIVE VALVES – SHORT TO
BATTERY
33318
The Ground Module detects a short to battery at either the Drive For-
ward or Drive Reverse valve.
Ground Module Drive Forward
and Reverse outputs are dis-
abled and open the ground cur-
rent return path.
Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
DRIVE FORWARD VALVE –
SHORT TO GROUND
33319
The Ground Module detects a short to ground at the Drive Forward
Valve output.
Ground Module Drive Forward
and Reverse outputs are dis-
abled.
Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
DRIVE REVERSE VALVE – OPEN
CIRCUIT
33320
The Ground Module detects an open circuit at the Drive Reverse Valve
output.
The Ground Module suspends
Drive Forward/Reverse com-
mands and reverts to Open Cur-
rent loop control for Drive; Drive
speed is limited to Creep after
both Drive Forward/Reverse
controls have been returned to
neutral and the machine is not
Enabled.
Check for a good connection at
the solenoid and for continuity
through this circuit. With the
solenoid disconnected, an
open circuit voltage of nearly
8.0V exists on the Ground Mod-
ule output pin for diagnostic
purposes. Inspect wiring for
physical damage. Cycle power
to clear the fault.
DRIVE REVERSE VALVE –
SHORT TO GROUND
33322
The Ground Module detects a short to ground at the Drive Reverse
Valve output.
Ground Module Drive Forward
and Reverse outputs are dis-
abled.
Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
Table 6-15. Fault Code Troubleshooting Information
Help Message
DTC
Condition Producing DTC
Control System Response or
Machine Condition
Corrective Action/
Operational Requirement
for Function Movement
and/or to Clear Fault
Summary of Contents for 340AJ
Page 1: ...Service and Maintenance Manual Model 340AJ P N 3121259 June 27 2017...
Page 2: ......
Page 10: ...vi JLG Lift 3121259 TABLE OF CONTENTS SECTION NO TITLE PAGE NO Thispageleftblankintentionally...
Page 15: ...3121259 JLG Lift xi LIST OF FIGURES FIGURE NO TITLE PAGE NO Thispageleftblankintentionally...
Page 18: ...xiv JLG Lift 3121259 LIST OF TABLES TABLE NO TITLE PAGE NO Thispageleftblankintentionally...
Page 42: ...SECTION 2 GENERAL 2 12 JLG Lift 3121259 NOTES...
Page 69: ...SECTION 3 CHASSIS TURNTABLE 3121259 JLG Lift 3 27 Figure 3 24 Bearing Pressing Tool...
Page 71: ...SECTION 3 CHASSIS TURNTABLE 3121259 JLG Lift 3 29 Figure 3 27 Bearing Nut Wrench...
Page 134: ...SECTION 3 CHASSIS TURNTABLE 3 92 JLG Lift 3121259 NOTES...
Page 157: ...SECTION 4 BOOM PLATFORM 3121259 JLG Lift 4 23 Figure 4 8 Rotator Counterbalance Valve...
Page 218: ...SECTION 5 HYDRAULICS 5 58 JLG Lift 3121259 Figure 5 32 Fasteners and Plugs Sheet 1 of 2...
Page 219: ...SECTION 5 HYDRAULICS 3121259 JLG Lift 5 59 Figure 5 33 Fasteners and Plugs Sheet 2 of 2...
Page 236: ...SECTION 5 HYDRAULICS 5 76 JLG Lift 3121259 Figure 5 39 Gear Pump Cutaway...
Page 246: ...SECTION 5 HYDRAULICS 5 86 JLG Lift 3121259 Figure 5 40 Oil Sampling Port...
Page 256: ...SECTION 6 JLG CONTROL SYSTEM 6 10 JLG Lift 3121259 Figure 6 3 Ground Module Sheet 1 of 4...
Page 273: ...SECTION 6 JLG CONTROL SYSTEM 3121259 JLG Lift 6 27 Figure 6 16 Analyzer Machine Setup Menu...
Page 274: ...SECTION 6 JLG CONTROL SYSTEM 6 28 JLG Lift 3121259 Figure 6 17 Analyzer Calibrations Menu...
Page 336: ...SECTION 6 JLG CONTROL SYSTEM 6 90 JLG Lift 3121259 NOTES...
Page 368: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 7 32 JLG Lift 3121259 NOTES...
Page 369: ......