JLG 1850SJ Service And Maintenance Manual page 137

Deutz Blink
SPN FMI
Code Code
1069 668 4360 0
1070 668 4360 1
1072 668 4361 3
1073 668 4361 4
1075 677 3361 6
1077 677 3361 3
1078 677 3361 3
1079 677 3361 4
1080 677 3361 4
1090 674 4345 5
3121619
Table 3-10. Engine Fault Codes
Description
The filtered urea cat upstream temperature
is greater than an applicable maximum tem-
perature threshold
The filtered temperature before urea cat is
less than an applicable minimum tempera-
ture threshold
Urea catalyst upstream temperature sensor:
the voltage of sensor measured by ECU is out
of the target range
Urea catalyst upstream temperature sensor:
the voltage of sensor measured by ECU is out
of the target range
Urea dosing valve: the current measured
value by ECU at the end of the injection is too
high
Urea dosing valve (low side power stage):
the current drain measured by ECU is above
the target range
Urea dosing valve (high side power stage):
the current drain measured by ECU is above
the target range
Urea dosing valve (low side power stage):
the current drain measured by ECU is above
the target range
Urea dosing valve (high side power stage):
the current drain measured by ECU is above
the target range
Urea backflow line heater: the current drain
measured by ECU is above the target range
SECTION 3 - CHASSIS & TURNTABLE
Possible Cause
Sensed temperature upstream SCR > physical
high limit
Sensed temperature upstream SCR catalyst <
than physical low limit
Voltage of temperature sensor upstream SCR
catalyst > maximum limit
Short circuit to battery
Voltage of temperature sensor upstream SCR
catalyst < minimum limit
Short circuit to ground
Fault in the wiriing
Defect urea dosing injection valve
Fault in the wiring
Fault in the wiring
Fault in the wiring
Fault in the wiring
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
Action
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
Cold start and ambient temperature < Thresh-
old? Missdetection?
Check wiring harness to UCatUsT-sensor
Exchange UCatUsT-sensor
Check sensor
Check wiring
Replace UCatUsT-sensor
Check sensor
Check wiring
Replace UCatUsT-sensor
Check wiring
Check the urea dosing injection valve
Threshold for error detection is an internal ECU
threshold
See substitute function
Check the wiring
Threshold for error detection is an internal ECU
threshold
Check the wiring
Check the wiring
Threshold for error detection is an internal ECU
threshold
Check the wiring
Threshold for error detection is an internal ECU
threshold
Check wiring
Check heating element
3-87