JLG 1850SJ Service And Maintenance Manual page 148

SECTION 3 - CHASSIS & TURNTABLE
Deutz Blink
SPN FMI
Code Code
1565 892 524065 0
1566 892 524065 1
1569 892 524065 3
3-98
Table 3-10. Engine Fault Codes
Description
The relativ pressure value of the exhaust gas
from the urea cat upstream
sensor is greater than an applicable maxi-
mum pressure threshold
The relativ pressure value of the exhaust gas
from the urea cat upstream sensor is less
than an applicable minimum pressure
threshold
voltage of pressure sensor upstream SCR >
voltage high limit
Possible Cause
sensed presure upstream SCR catalyst > physi-
cal high range limit f(exhaust volume
flow)
UCatUsP_pRelFlt_mp > UCatUsP_pMax_mp
sensed presure upstream SCR catalyst > physi-
cal high range limit f(exhaust volume
flow)
UCatUsP_pRelFlt_mp < UCatUsP_pMin_mp
voltage of pressure sensor upstream SCR > volt-
age high limit
Action
Check for crystallisation in exhaust line
upstream SCR and dwnstream of urea injector
Check correct connection from exhaust line to
pressure sensor upstream SCR catalyst:
syphons?, water in tube?, water in sensor?
Check that exhaust pipe outlet is free (down-
stream SCR catalyst)
Check wiring of pressure sensor upstream SCR
catalyst
Check pressure sensor upstream SCR catalyst:
sensor has no connection to vehicle body? =>
Ensure that sensor is free
Does sensor oscillate heavely at engine low idle
/ high idle? => try to supress the
oscillating
Exchange pressure sensor upstream SCR cata-
lyst
Check calculated exhaust volume flow of
engine within EDC: SCR_dvolSCRUs
pausible? If not:
Check T sensor upstream SCR catalyst, check
complete engine air path: EGR-Valve,
Intake throttle, turbocharger, piping for leak-
age and function
Check SCR catalyst: Broken? Exchange SCR-Cat-
alyst
Check correct connection from exhaust line to
pressure sensor upstream SCR catalyst:
leakage?
Check electric connector: 4h pin open / new
connector type used? pressure exchange
from inside electrical connector with the envi-
ronemt possible
Check exhaust line: any leakages upstream of
SCR catalyst?
Check wiring of pressure sensor upstream SCR
catalyst
Exchange pressure sensor upstream SCR cata-
lyst
Check calculated exhaust volume flow of
engine within EDC: SCR_dvolSCRUs
pausible? If not:
Check T sensor upstream SCR catalyst, check
complete engine air path: EGR-Valve,
Intake throttle, turbocharger, piping for leak-
age and function
Check SCR catalyst: Broken? Exchange SCR-Cat-
alyst
Check wiring of pressure sensor upstream SCR
catalyst
Check pressure sensor upstream SCR catalyst
Exchange pressure sensor upstream SCR cata-
lyst
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