JLG 1850SJ Service And Maintenance Manual page 144

SECTION 3 - CHASSIS & TURNTABLE
Deutz Blink
SPN FMI
Code Code
1455 711 3711 12
1505 8-4-3 524057 2
1533 246 524074 9
1534 247 524075 11
3-94
Table 3-10. Engine Fault Codes
Description
Temperature Phy_tPfWgh, the weighted
DPF temperature < Threshold 1
Temperature Phy_tPfWgh, the weighted
DPF temperature > Threshold 2
towards the end of the stand-still main
phase.
Low fuel pressure: the low fuel pressure cal-
culated by ECU is underneath the target
range; the ECU activates a system reaction
Open load sensor internally at NOx-sensor
downstream SCR
Short circuit sensor internally at NOx-sensor
downstream SCR
Possible Cause
temperature Phy_tPfWgh, the weighted DPF
temperature, is below or above
the target temperature towards the end of the
stand-still main phase.
Fuel pressure below warning threshold
Open load sensor internally at NOx-sensor
downstream SCR
Short circuit sensor internally at NOx-sensor
downstream SCR
Action
Check temperature upstream DOC
Exh_tSensOxiCatUs within Stand-still: > 450
°C? If
not:
=> Check air path of engine: EGR-Valve,
Intake-Throttle, Turbocharger and Piping
each for leakage and correct function
Check temperature difference across DOC by
Exh_tSensOxiCatDs -
Exh_tSensOxiCatUs within Stand-still: <
100°C? If not:
Check exhaust pipe downstream turbo charger
for oil?
check injectors: is an injector got stuck?
Too many hydrocarbons in exhaust? White
smoke (at hot EAT system, not at cold
start)?
Check air path of engine: EGR-Valve, Intake-
Throttle, Turbocharger and Piping each
for leakage and correct function
Check exhaust gas temperature sensors within
EAT-system: T upstream DOCC, T
downstream DOC & T upstream SCR catalyst
all three of them can influence Phy_tPfWgh
Threshold for error detection is an internal ECU
threshold.
Check low fuel pressure system (fuel feed pump,
relay , fuse, wiring, sensor) and if
necessary repair or replace it.
Threshold for error detection is an internal ECU
threshold.
Check NOx-Sensor downstream SCR catalyst:
water inside? Shake out sensor after
dismounting. => If water inside, replace sen-
sor.
Check mounting position of sensor and judge it
regarding condense water formation /
agglomeration.
Check wiring harness
Exchange sensor
Threshold for error detection is an internal ECU
threshold.
Check NOx-Sensor downstream SCR catalyst:
water inside? Shake out sensor after
dismounting. => If water inside, replace sen-
sor.
Check mounting position of sensor and judge it
regarding condense water formation /
agglomeration? Rearrange if critical and possi-
ble
Check wiring harness
Exchange sensor
3121619