JLG 1850SJ, Service And Maintenance Manual, Page: 162 / 712

SECTION 3 - CHASSIS & TURNTABLE
3-112 3121619
1904 2-7-8 3520 2 Measured DEF Quality from UQS is too low.
Quality value received from UQS is < 22 % for
a certain time and a certain number or for
measuring conditions not observed for a cer-
tain time. Suspected components:
Urea quality sensor defect
Wrong installation (measuring air)
Urea level sensor defect
Non urea filled in tank
CANBUS problems
Evaluation conditions for new quality check not
fulfilled after one previous mal detection Check that there is liquid urea of known quality
in the tank first
Check urea tank level. Add urea until level is at
least 10 cm above sensor.
Ensure that urea is not frozen / sufficient urea is
liquid
Check Sensor: Are urea tank temperature and
level displayed? Changes the level if you
refill urea?
Check electrical connection
Check CANBus
New quality detection is carried out if urea re-
fill is detected or if an quality evaluation
was triggered and was not finished success-
fully: To provoke a quality measurement: refill
urea, at least 10 % of tank volume
Wait until quality evaluation was carried out,
can take up to 30 minutes => check value.
It should be about 33 %
Exchange quality sensor
1907 278 3520 13 Urea quality at UQS out of range the speci-
fied thresholds; invalid quality of the urea
qualiy Suspected components
DEF quality sensor
DEF Check DEF quality and/or DEF quality sensor
1908 277 3519 13 Temperature at UQS out of range the speci-
fied thresholds; invalid quality of the tem-
perature Suspected Components
Tank heater
DEF sensor Check temperature system and/or DEF quality
sensor
1911 127 3532 3 The urea quality value from the sensor is
greater than the maximum physical range
threshold
Comment: tank temperature is measured by
the UQS sensor Suspected Components:
UQS defect Check DEF quality and/or sensor.
1912 127 3532 4 The urea quality value from the sensor is
lower than the minimum physical range
threshold. Suspected Components:
UQS defect Check DEF quality and/or Sensor.
1914 669 4365 3 Internal error of DEF qualitysensor. Suspected componentes:
DEF qualitysensor
Wiring harness Check wiring harness and DEF qualitysensor
1915 6-6-9 4365 4 Internal error of DEF qualitysensor. Suspected componentes:
DEF qualitysensor
Wiring harness Check wiring harness and DEF qualitysensor
1917 2-8-6 3936 14 Standstill escalation by time. In case the
standstill request will not be released within
50 h by the driver this fault code will be set. Stand-still request ignored by the operator.
Display / stand-still request lamp broken. Perform Stand-still. If soot load level of DPF has
increased too high already call service
to perform stand-still.
In case the DPF soot load level remove DPF =>
Exchange DPF.
Table 3-10. Engine Fault Codes
Deutz
Code
Blink
Code
SPN FMI Description Possible Cause Action