Service Manual Instruction Manual

SECTION 6 - JLG CONTROL SYSTEM
6-24 – JLG Lift – 3121616
LIFT UP DUMP SHORT TO
BATTERY
LIFT DOWN HOLDING SHORT TO
GROUND
LIFT DOWN HOLDING OPEN CIR-
CUIT
LIFT DOWN SHORT TO BATTERY
HOUR METER OPEN CIRCUIT This fault cannot be detected during normal operation. It may be reported dur-
ing self test.
FORD ECM POWER OPEN
CIRCUIT
This fault cannot be detected during normal operation. It may be reported dur-
ing self test.
FORD ECM POWER SHORT TO
BATTERY
This fault cannot be detected during normal operation. It may be reported dur-
ing self test.
3/4 Flash code 3/4 indicates a driver problem on a platform valve block valve driver.
All driver faults are detected in a similar manner. Open circuit faults are detected
when analog feedback reads too high and the output is commanded off. Short
to ground is detected when analog feedback reads low and the output is com-
manded on. Short to battery is detected when analog feedback reads Vbat and
the output is commanded off. Not reported during 2 second power-up.
6
BASKET UP SHORT TO
BATTERY
BA SK ET UP SHOR T TO GRO UND
BASKET UP OPEN CIRCUIT
BASKET UP SHORT TO
BATTERY OR OPEN CIRCUIT
Only occurs on machines with electronic basket leveling
BASKET DOWN SHORT TO BAT-
TERY
BASKET DOWN SHORT TO
GROUND
BASKET DOWN OPEN
CIRCUIT
BASKET DOWN SHORT TO BAT-
TERY OR OPEN CIRCUIT
Only occurs on machines with electronic basket leveling.
BASKET LEFT SHORT TO
BATTERY
BASKER LEFT SHORT TO
GROUND
BASKET LEFT OPEN CIRCUIT
BASKET RIGHT SHORT TO BAT-
TERY
BASKET RIGHT SHORT TO
GROUND
BASKET RIGHT OPEN CIRCUIT
JIB UP SHORT TO BATTERY
JIB UP SHORT TO GROUND
JIB UP OPEN CIRCUIT
Table 6-3. Help Fault Codes, Displayed Faults, and Descriptions
Fault Flash
Code
Communicated (Displayed on
Analyzer) Fault
Description Priority