JLG 660SJ Service And Maintenance Manual page 270

SECTION 6 - JLG CONTROL SYSTEM
Fault Flash Communicated (Displayed on
Code Analyzer) Fault
l/S JOY. CENTER TAP BAD
PUMP SWITCHES LOCKED –
SELECTED BEFORE START
SWTICH
FOOTSWITCH SELECTED BEFORE
START
2/4
2/5
BOOM PREVENTED – DRIVE
SELECTED
DRIVE PREVENTED – ABOVE
ELEVATION
DRIVE PREVENTED – BOOM
SELECTED
DRIVE PREVENTED – TILTED &
ABOVE ELEVATION
MODEL CHANGED – HYDRAU-
LICS SUSPENDED – CYCLE EMS
2/7
2/8
RETURN FILTER BYPASSED
CHARGE PUMP FILTER BYPASSED Charge pump filter clogged
3/1
3/2
3/3
ALTERNATOR/ECM POWER
SHORT TO GROUND
HOUR METER SHORT TO
GROUND
HOUR METER SHORT TO
BATTERY
HORN SHORT TO GROUND
HORN OPEN CIRCUIT
6-20
Table 6-3. Help Fault Codes, Displayed Faults, and Descriptions
Resistive joysticks: These faults occur when center tap voltage is not between
3.08 volts and 3.83 volts. Due to resistor tolerances there is a +/-.1 volt range
around these values where the fault may be indicated.
Inductive joysticks: These faults occur when center tap voltage is not between
2.18 volts and 2.70 volts. Due to resistor tolerances there is a +/-.1 volt range
around these values where the fault may be indicated.
This fault occurs when a hydraulic function switch is closed before start switch is
closed.
User attempted to start machine with footswitch engaged.
Flash code 2/4 indicates steering digital inputs are faulty.
NOT REQUIRED
Flash code 2/5 indicates a function is prevented due to a cutout.
A boom function is selected while a drive function is selected and drive cutout is
configured to prevent simultaneous drive & boom operation.
Drive is selected while above elevation and drive cutout is configured to pre-
vent drive.
Drive is selected while a boom function is selected and drive cutout is config-
ured to prevent simultaneous drive & boom operation.
Drive is selected while tilted and above elevation and tilt is configured to cutout
drive.
User changed model number using the analyzer. User must cycle power before
hydraulics system will be active again.
Flash code 2/7 indicates accelerator input is faulty.
NOT REQUIRED
Flash code 2/8 indicates a problem with a hydraulic filter. Not reported during 2
second power-up.
Hydraulic return filter clogged
Flash code 3/1 indicates a contactor did not close when energized.
NOT REQUIRED
Flash code 3/2 indicates a contactor did not open when energized.
NOT REQUIRED
Flash code 3/3 indicates a driver problem. All driver faults are detected in a simi-
lar manner. Open circuit faults are detected when analog feedback reads too
high and the output is commanded off. Short to ground is detected when ana-
log feedback reads low and the output is commanded on. Short to battery is
detected when analog feedback reads Vbat and the output is commanded off.
Not reported during 2 second power-up.
– JLG Lift –
Description Priority
4
11
5
6
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