JLG 400S Service And Maintenance Manual page 233

Deutz Blink
SPN FMI
Code Code
3519 12 1895 277
3519 13 1908 277
3520 2 1904 2-7-8
3520 3 1896 278
3121671
Table 3-16. Deutz Engine Fault Codes
Description
The integrated temperature sensor of the
Urea Quality Sensor measures higher
temperature than threshold
Temperature at UQS out of range the
specified thresholds; invalid quality of the
temperature
Measured DEF Quality from UQS is too low.
Quality value received from UQS is < 22 %
for a certain time and a certain number or
for measuring conditions not observed for
a cer- tain time.
The integrated diagnostic of the Urea
Quality
Sensor recognized a short circuit to battery
SECTION 3 - CHASSIS & TURNTABLE
Possible Cause
Temperature sensor inside the UQS defect.
CAN Communication corrupted.
Overheating of the DEF tank due to
malfunction of the heating valve.
Flow direction is of coolant is wrong due to
mixed up the hoses routed to the heating
valve.
Overheating of the DEF tank due to heat
transfer
from neighbor parts.
Suspected Components
Tank heater
DEF sensor
Suspected components: Urea quality sensor
defect
Wrong installation (measuring air) Urea level
sensor defect
Non urea filled in tank
CANBUS problems
Evaluation conditions for new quality check
not fulfilled after one previous mal detection
wiring harness of UQS corrupted
CAN Communication corrupted
Action
Check the temperature sensor signal for
plausibility. In case of improper signal,
exchange the suction unit in the tank.
Check CAN bus communication for proper
signal. In case of improper signal, exchange
the suction unit in the tank.
Check the function of heating valve and
routing of the hoses. The coolant flow through
the heating valve must be observed according
to the shown arrow.
In case all actions above are OK, check the real
temperature in the DEF tank during
worst case condition and improve the installa-
tion of the DEF tank.
Check temperature system and/or DEF quality
sensor
Check that there is liquid urea of known
quality in the tank first
Check urea tank level. Add urea until level is at
least 10 cm above sensor.
Ensure that urea is not frozen / sufficient urea
is liquid
Check Sensor: Are urea tank temperature and
level displayed? Changes the level if you refill
urea?
Check electrical connection
Check CANBus
New quality detection is carried out if urea re-
fill is detected or if an quality evaluation
was triggered and was not finished success-
fully: To provoke a quality measurement: refill
urea, at least 10 % of tank volume
Wait until quality evaluation was carried out,
can take up to 30 minutes => check value. It
should be about 33%
Exchange quality sensor
Threshold for error detection is an internal ECU
threshold.
Check the wiring harness from the ECU to the
suction unit of the DEF tank
Check the CAN bus communication. If the
signal
is corrupt, then exchange the suction unit.
3-175