JLG 1850SJ, Service And Maintenance Manual, Page: 157 / 712

SECTION 3 - CHASSIS & TURNTABLE
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1880 138 1761 14 The DEF tank level is below the threshold. actual DEF tank level SCRUTnk_rVol_mp [%] is
below the threshold Check DEF level => if empty, refill
Check DEF level sensor.
If there is urea in the tank loose the sensor and
move it. The floater must be free and
move if you lift the sensor body.
SCRUTnk_rVol_mp must change.
Compare SCRUTnk_rVol_mp to:
1 = SCR_rawUTnkLvl
2 = SCR_rAdapUtnkLvl
3 = SCRUTnk_rActTnkVol
*SCRUTnk_facVolPer_mp
In case of malfunction, exchange DEF level sen-
sor.
1881 683 4768 2 At engine cold start conditions the sensed
exhaust gas temperature downstream DOC
(Exh_tSensTOxiCatDs)
has exceeded the sum of ambient tempera-
ture (EnvT_t) + offset (40°C) earlier than the
sensed exhaust gas
temperature upstream of DOC
(Exh_tSensTOxiCatUs).
The check is only performed once each igni-
tion cycle and only if the start is judged a cold
start.
Error status is frozen for that ignition cycle.
No healing possible. Difference temperature of exhaust gas temper-
ature downstream DOC and fixed
ambient temperature at ignition on exceeds a
certain limit earlier than the difference
temperature of exhaust gas temperature
upstream DOC and fixed ambient temperature
at ignition on. Check whether all exhaust gas temperature
sensors within the EAT system are
mounted properly: Within the exhaust line and
at correct positions.
Check the position of the sensor upstream SCR
which might be physically mounted in
the wrong position.
If cold start condition can be made sure (engine
was off for at least 8 h) compare
values of EnvT_t, EngDa_tEng, Exh_TOxiCatUs,
Exh_tOxiCatDs and
SCR_tSensUCatUsT at ignition on, without
starting the engine. All identical? Then the
sensors itself are okay.
Check exhaust piping for leakage.
Check wiring of sensors
Replace sensors
Check DOC => physicallly intact?
1891 272 524190 14 Not enough urea in tank or low urea quality
or hardware tampering failure is detected or
hardware failure is detected Low DEF tank level
Low DEF quality
Hardware Tampering is active
Hardware Failure is active Check DEF level in tank. If there is no DEF, refill
up to volume above the warning
threshold.
Check the DEF quality in the tank. If wrong fluid
is filled, refill with proper DEF.
Check other errors based on hardware malfunc-
tions.
1892 273 524191 14 A low DEF tank level or a low DEF quality is
detected or hardware tampering(system
components are pinched off) or hardware
failures as shortcut to battery, shortcut to
ground
etc. are detected. Low DEF tank level
Low DEF quality
Hardware Tampering is active
Hardware Failure is active Threshold for error detection is an internal ECU
threshold.
Check the DEF level in tank. If there is no DEF,
refill up above the warning level.
Check DEF quality filled in the tank.
Check other errors based on hardware tamper-
ing or failure.
Table 3-10. Engine Fault Codes
Deutz
Code
Blink
Code
SPN FMI Description Possible Cause Action