JLG 1850SJ Service And Maintenance Manual page 151

Deutz Blink
SPN FMI
Code Code
1639 966 524147 13
1646 869 524063 12
3121619
Table 3-10. Engine Fault Codes
Description
No proper urea pressure level could be build
up within the SCR system state "Fill Lines"
=> SCRCo_stStatus_mp = 1 within some
miuntes
SCR supply module temperature is not
reaching a threshold before a calibratable
time is exceeded.
Corresponding to the environmental Tem-
perature a specific defrosting time is given.
After starting the defrosting a clock counter
is starting. Does the counter reach the given
defrosting time limit, an error will be
detected. Is the temperature reached in time
the clock counter will be reset
Example: by using the calibrated tempera-
ture/time curve --> environmental temper-
ature 0°C --> defrosting time limit 6000s --
> if the clock counter reaches 6000s the error
will
be detected
SECTION 3 - CHASSIS & TURNTABLE
Possible Cause
This error shows up, if no proper urea pressure
level could be build up within the SCR
system state "Fill Lines" =>
SCRCo_stStatus_mp = 1 within some minutes
Once the urea pump pressure has exceeded the
threshold the error is declared as
okay.
Suspected components:
Suction line blocked
PWM Powerstage has a defect and a default
value which leads not to a rising pressure
Pump Pressure sensor defect
pump filter contains dirty parts
reverting valve continously open
Suspected components:
Enviroment temperature sensor defect
SCR supply module temperature sensor defect
SCR supply module electrical heater defect
Action
Make sure that frozen lines, pump or tank can be
excluded!
Check whether there is urea in the urea tank
Check urea lines:
All lines connected? The right lines connected to
the correct places?
Suction line blocked?
No leakage? Not also urea to the outside but also
air into the lines, especially in the
suction line!
Perform service routine "pressure test":
Does the urea pump work? => check wiring
harness & PWM signal for pump
Does the urea pressure rise?
DFC already healed?
If all unsuccessful so far:
Check urea pressure sensor: At ignition on and
SCR system state = 0 ("Init check"),
SCR_pAbsAdapUPmpP shall be identical to
EnvP_p. Fulfilled: Sensor okay!
Check reverting valve => see
DFC_SCRCoRevVlvBlk
Check pump filter: dirt inside?
Suspected components:
Urea pump broken
Reverting valve continously open
Urea suction line, backflow line broken or con-
nection swapped
PWM Powerstage has a defect
Pump Pressure sensor broken
Check
Environment temperature sensor
SCR supply module temperature sensor
SCR supply module electrical heater
3-101