Symptom Cause Remedy Ref.
11. Leakage or insufficient pres-
sure in the low-pressure fuel
system
► Leak test (visual inspec-
tion), arrange pressure
check by qualified service
centre
Engine switches itself
off
12. ECM control unit defective
(complete failure)
► Arrange inspection by spe-
cialist workshop
13. Voltage supply to the ECM
interrupted or short circuit in
the wiring
► Arrange inspection by spe-
cialist workshop
14. Leaks or insufficient pres-
sure in the fuel low pressure
circuit or fuel delivery pump
drive defective
► Leak test (visual inspec-
tion); arrange pressure
check by qualified specialist
workshop
Engine is in emergency
operation mode
15. Data flow interruption to the
ECM control unit
► Retrieve error log from con-
trol unit, consult professio-
nal service centre
Engine rumbles, rattles
or runs unevenly
16. Malfunction of the fuel sys-
tem
► Retrieve error code, consult
professional service centre
Poor engine perform-
ance (low power)
17. Air filter dirty or blocked ► Replace filter insert
18. Charge air temperature too
high due to dirty charge air
cooler or radiator
► Clean charge air cooler and
radiator from the outside
19. Engine coolant temperature
too high
► Check temperature sensor,
replace if necessary, check
fan speed; defective ther-
mostat: consult a professio-
nal service centre
20. Fuel system defect (blocked,
leaking)
► Check for leaks visually,
consult a professional serv-
ice centre
21. Charge air system leaking,
hose clamp on air inlet hose
loose or defective
► Check leaktightness, check
boost pressure sensor, re-
place if necessary, consult
professional service centre
22. The engine diagnosis control
lamp blinks. The AdBlue® /
DEF reserve has been used
up.
► Fill AdBlue® / DEF reser-
voir
23. The engine diagnosis control
lamp lights up. Emission-rel-
evant fault or malfunction in
exhaust gas after-treatment
system. Faults or malfunc-
tions can cause damage to
the exhaust gas after-treat-
ment system.
► Have the exhaust gas after-
treatment checked in a
qualified service centre
Excessive fuel con-
sumption
24. Connection points (plug-in
pump line and injection jets)
leaking
► Leak inspection by qualified
specialist workshop
25. Faulty combustion ► Have qualified personnel in-
spect the engine
Operating and Maintenance Manual
Snow groomer BISON
194
(255)
12 - Troubleshooting
BISON 908930245 - 30367
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