JLG 1850SJ Service And Maintenance Manual page 150

SECTION 3 - CHASSIS & TURNTABLE
Deutz Blink
SPN FMI
Code Code
1586 894 524067 1
1593 129 1761 0
1594 129 1761 1
1598 892 524065 2
3-100
Table 3-10. Engine Fault Codes
Description
Filtered urea supply module temperature
(SCR_tSMT) value is below an applicable
minimum temperature threshold of the sup-
ply module
The temperature is read out via the PWM sig-
nal of the urea pump. That is only possible in
status init of the SCR-system short after igni-
tion was switched on. When that state is
left the sensed temperature value is frozen.
The urea tank level sensor detects a value
higher than the maximum allowed thresh-
old
The DEF tank level sensor detects a value
lower than the minimum allowed threshold
Comparison of urea cat upstream exhaust
gas- and environment pressure, the differ-
ence should not exceed a certain limit
abs(UCatUsP_pDiffEnvCat_mp) > Thresh-
old
Possible Cause
sensed temperature of urea within supply mod-
ule < physical low range limit
Suspected components:
Urea Quality Sensor defect
mechanical defect at the float gauge
Suspected components:
Urea Quality Sensor defect
mechanical defect at the float gauge
absolut value of difference between sensed
pressure upstream SCR catalyst and
environmental pressure > limit
abs(UCatUsP_pDiffEnvCat_mp) > Threshold
Action
Check ambient temperature EnvT_t < thresh-
old?
Compare SCR_tSMT with SCR_tSMHtrT
Check wiring with regard to supply modul
heater
exchange urea pump unit
Supply module temperature sensor defect
Supply module defect
Check level sensor and float gauge
Check level sensor and float gauge
Check electric connector: 4h pin open / new
connector type used?
pressure exchange from inside electrical con-
nector with the environemt possible?
water in sensor?
sensor frozen?
Check wiring of pressure sensor upstream SCR
catalyst
Exchange pressure sensor upstream SCR cata-
lyst
Check intake manifold pressure sensor
(Air_pCACDs)
Check ambient pressure sensor (EnvP_p)
3121619