KTM 150 EXC TPI 2021 Owner's Manual page 151

Faults
Engine overheats
White smoke emission (steam
in exhaust gas)
Gear oil exits at the vent hose
Water in the gear oil
Malfunction indicator lamp
lights up or flashes
12-V battery discharged
Values in combination
instrument deleted (time, stop
watch, lap times)
Possible cause
Thermostat defective
Damaged cylinder head or
cylinder head gasket
Too much gear oil added
Damaged radial shaft seal ring
or water pump
Error in the electronic fuel
injection
The 12-V battery is not being
charged by the alternator
Unwanted power consumer
The combination instrument
battery is empty
TROUBLESHOOTING 21
Action
–
Check the thermostat.
Guideline
Opening temperature: 70 °C (158 °F)
–
Check the cylinder head and cylinder
head gasket.
–
Check the gear oil level. (
–
Check the radial shaft seal ring and the
water pump.
–
Check wiring for damage and electrical
plug-in connectors for corrosion and
damage.
–
Read out the fault memory using the
KTM diagnostics tool.
–
Check charging voltage.
–
Check the stator winding of the alter-
nator.
–
Check the open-circuit current.
–
Change combination instrument bat-
tery. ( p. 120)
p. 140)
149