JLG 1850SJ, Service And Maintenance Manual, Page: 573 / 712

SECTION 6 - JLG CONTROL SYSTEM
3121619 6-141
438 4 3 HIGH ENGINE TEMP (Ford engine only) The engine temperature
is > 117 C.
(Deutz engine only) The engine tempera-
ture is > 130 C. - Ford / Deutz engine only.
439 4 3 AIR FILTER BYPASSED The Air Filter is clogged.
4310 4 3 NO ALTERNATOR OUTPUT Battery voltage is < 11.5 volts for more
then 15 seconds after engine start.
4311 4 3 LOW OIL PRESSURE (Ford engine only) The ECM has reported a
low oil pressure fault. (Deutz engine only)
Oil pressure is < 8 PSI for more then 10 sec-
onds after engine start. - Ford / Deutz engine only.
4313 4 3 THROTTLE ACTUATOR FAILURE The engine RPM is > XXX for more then XX
seconds.
4314 4 3 WRONG ENGINE SELECTED - ECM DETECTED A ECM was detected with a non- ECM type
engine selected.
4322 4 3 LOSS OF ENGINE SPEED SENSOR The engine RPM sensor indicates 0 RPM
AND the Oil Pressure Sensor indicates > 8
PSI for three seconds. - Diesel engine only.
4323 4 3 SPEED SENSOR READING INVALID SPEED The engine RPM sensor indicates > 4000
RPM. - Diesel engine only.
4364 4 3 SCR CLEANING NOT INITIATED SCR Cleaning was requested bu not initi-
ated.
4365 4 3 RUNNING AT CREEP - ENGINE POWER
REDUCTION Triggered by 524190:14 (engine con-
trolled)
4366 4 3 SCR CLEANING REQUIRED - SOOT DETECTED SCR Crystallization has been detected
(engine controlled)
4368 4 3 ALL FUNCTIONS PREVENTED - ENGINE
POWER REDUCTION SEVERE Triggered by 524191:14 (engine con-
trolled)You
4375 4 3 WATER IN FUEL The engine has shut down because an
unacceptable amount of water has been
detected in the fuel or there is an issue with
the water in fuel sensor.
If operating in platform mode, platform
alarm will sound continuously and low fuel
indicator will flash.
If operating in ground mode, the ground
alarm will sound
Water in fuel filter for water or in fuel or water in fuel
sensor.
4376 4 3 FUNCTIONS PREVENTED - ENGINE OIL
WARM UP ACTIVE Engine Oil Warm Up is active because the
engine was started when the engine cool-
ant was less than 32 deg F. Engine Oil Warm
Up will remain active until the engine cool-
ant is greater than 32 deg F or the engine
has been running for 60s and the engine
coolant is less than 32 deg F.
Machine functions will be prevented until
Engine Oil Warm Up is complete.
Table 6-13. Diagnostic Trouble Code Chart
DTC
Flash
Code
Sequence Fault Message Fault Description Check