JLG 1850SJ, Service And Maintenance Manual, Page: 137 / 712

SECTION 3 - CHASSIS & TURNTABLE
3121619 3-87
1069 668 4360 0 The filtered urea cat upstream temperature
is greater than an applicable maximum tem-
perature threshold Sensed temperature upstream SCR > physical
high limit Check temperature difference across DOC
(Exh_tOxiCatDs-Exh_TOxiCatUs) at higher
engine load => high difference > 100 K?
If yes, the engine emitts too many Hydrocar-
bons => check injectors: is an injector got
stuck?
=> Check EGR Valve
If difference normal the exhaust out of the engie
itself is too hot:
=> Check air path of engine: EGR-Valve,
Intake-Throttle, Turbocharger and Piping
each for leakage and correct function
If that error was set while stand-still operation
the error source could be exothermal
soot burn off in DPF (which should not happen)
=> Dismount DPF and check it visually
exchange temperature sensor upstream SCR
1070 668 4360 1 The filtered temperature before urea cat is
less than an applicable minimum tempera-
ture threshold Sensed temperature upstream SCR catalyst <
than physical low limit Cold start and ambient temperature < Thresh-
old? Missdetection?
Check wiring harness to UCatUsT-sensor
Exchange UCatUsT-sensor
1072 668 4361 3 Urea catalyst upstream temperature sensor:
the voltage of sensor measured by ECU is out
of the target range Voltage of temperature sensor upstream SCR
catalyst > maximum limit
Short circuit to battery Check sensor
Check wiring
Replace UCatUsT-sensor
1073 668 4361 4 Urea catalyst upstream temperature sensor:
the voltage of sensor measured by ECU is out
of the target range Voltage of temperature sensor upstream SCR
catalyst < minimum limit
Short circuit to ground Check sensor
Check wiring
Replace UCatUsT-sensor
1075 677 3361 6 Urea dosing valve: the current measured
value by ECU at the end of the injection is too
high Fault in the wiriing
Defect urea dosing injection valve Check wiring
Check the urea dosing injection valve
1077 677 3361 3 Urea dosing valve (low side power stage):
the current drain measured by ECU is above
the target range Fault in the wiring Threshold for error detection is an internal ECU
threshold
See substitute function
Check the wiring
1078 677 3361 3 Urea dosing valve (high side power stage):
the current drain measured by ECU is above
the target range Fault in the wiring Threshold for error detection is an internal ECU
threshold
Check the wiring
1079 677 3361 4 Urea dosing valve (low side power stage):
the current drain measured by ECU is above
the target range Fault in the wiring Check the wiring
1080 677 3361 4 Urea dosing valve (high side power stage):
the current drain measured by ECU is above
the target range Fault in the wiring Threshold for error detection is an internal ECU
threshold
Check the wiring
1090 674 4345 5 Urea backflow line heater: the current drain
measured by ECU is above the target range Open load
If this error detected during the heating phase is
a result error: KWP 1089
Broken wiring, broken heating element in back-
flow line Threshold for error detection is an internal ECU
threshold
Check wiring
Check heating element
Table 3-10. Engine Fault Codes
Deutz
Code
Blink
Code
SPN FMI Description Possible Cause Action