JLG 660SJ ANSI Service Manual - Manual (Page 241)

SECTION 6 - JLG CONTROL SYSTEM
3120718 – JLG Lift – 6-27
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 cir-
cuit faults are detected when the analog feedback reads too high and
the output is commanded off. Short to ground is detected when the
analog feedback reads low and the output is commanded on. Short to
battery is detected when the analog feedback reads Vbat and the out-
put is commanded off. Not reported during 2 second power-up. 6
BASKET UP SHORT TO BAT-
TERY
BASKET UP SHORT TO
GROUND
BASKET UP OPEN CIRCUIT
BASKET UP SHORT TO
BATTERY OR OPEN CIRCUIT Only occurs on machines with electronic basket leveling
BASKET DOWN SHORT TO
BATTERY
BASKET DOWN SHORT TO
GROUND
bASKET DOWN OPEN CIR-
CUIT
BASKET DOWN SHORT TO
BATTERY 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
BATTERY
BASKET RIGHT SHORT TO
GROUND
BASKET RIGHT OPEN CIR-
CUIT
JIB UP SHORT TO BATTERY
JIB UP SHORT TO GROUND
JIB UP OPEN CIRCUIT
JIB DOWN SHORT TO BAT-
TERY
JIB DOWN SHORT TO
GROUND
JIB DOWN OPEN CIRCUIT
JIB LEFT SHORT TO BAT-
TERY
JIB LEFT SHORT TO
GROUND
Table 6-3. Help Fault Codes, Displayed Faults, and Descriptions - S/N 66937 to Present
Fault Flash
Code
Communicated (Displayed on
Analyzer) Fault
Description Priority