Jlg 340AJ Service Manual User Manual download pdf (Page 297)

SECTION 6 - JLG CONTROL SYSTEM

3121259 – JLG Lift – 6-53

TOWER LIFT DOWN VALVE –

SHORT TO GROUND

33109 The Ground Module detects a short to ground at the Tower Lift Down

Valve output.

Ground Module Tower Lift Up

and Down 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.

TOWER LIFT DOWN VALVE –

OPEN CIRCUIT

33110 The Ground Module detects an open circuit at the Tower Lift Down

Valve output.

The Ground Module suspends

Tower Lift Up/Down com-

mands and reverts to Open

Loop Current control for Tower

Lift; Tower Lift speed is limited

to Creep after both Tower Lift

Up/Down controls have been

returned to neutral and

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.

SWING RIGHT VALVE – SHORT

TO GROUND

33118 The Ground Module detects a short to ground at the Swing Right

Valve output.

Swing Left and Right outputs

are disabled.

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.

SWING RIGHT VALVE – OPEN

CIRCUIT

33119 The Ground Module detects an open circuit at the Swing Right Valve

output.

The Ground Module suspends

Swing Left/Right commands

and reverts to Open Loop Cur-

rent control for Swing; Swing

speed is limited to Creep after

both Swing Left/Right controls

are returned to neutral and

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.

TELESCOPE IN VALVE – SHORT

TO BATTERY

33120 The Ground Module detects a short to battery at the Telescope In

Valve output.

Ground Module Telescope In,

Telescope Out, and Flow Con-

trol Valve outputs are disabled.

Inspect wiring for physical

damage and check for wire

continuity. Cycle power to clear

the fault.

SWING LEFT VALVE – SHORT

TO GROUND

33122 The Ground Module detects a short to ground at the Swing Left Valve

output.

Ground Module Swing Left and

Right outputs are disabled.

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.

TELESCOPE OUT VALVE –

SHORT TO BATTERY

33123 The Ground Module detects a short to battery at the Telescope Out

Valve output.

Ground Module Telescope In,

Telescope Out, and Flow Con-

trol Valve outputs are disabled.

Inspect wiring for physical

damage and check for wire

continuity. Cycle power to clear

the fault.

Table 6-10. 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

1 2 ... 292 293 294 295 296 297 298 299 300 301 302 ... 347 348

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