KTM 250 EXC-F EU 2010, Owner'S Manual

Page: 116 / 136

21 TROUBLESHOOTING
114
Faults Possible cause Action
Engine overheats Foam formation in cooling system
–
Drain the coolant. ( p. 101)
–
Refill the coolant. ( p. 102)
Bent radiator hose
–
Change the radiator hose.
Thermostat defective
–
Check the thermostat.
Guideline
Opening temperature: 70 °C (158 °F)
Defect in radiator fan system
–
Check the radiator fan fuse.
–
Check fuse 4 .
–
Check the radiator fan.
FI warning lamp ( MIL ) lights
up/flashes
Defect in fuel injection system
–
Stop the motorcycle and identify the faulty part
using the blink code.
–
Check the cabling for damage and the electri-
cal plug-in connectors for corrosion and dam-
age.
–
Read out the fault memory using the KTM diag-
nostics tool.
High oil consumption Engine vent hose bent
–
Route the vent hose without bends or replace it
if necessary.
Engine oil level too high
–
Check the engine oil level. ( p. 106)
Engine oil too thin (low viscosity)
–
Change the engine oil and oil filter, clean the
oil screen.
( p. 107)
Piston and cylinder worn
–
Measure the piston/cylinder mounting clear-
ance.
Battery discharged Battery is not being charged by alter-
nator
–
Check the charging voltage.
–
Check the stator winding of the alternator.
Undesired power consumer
–
Check the closed current.
Speedometer values deleted (time,
stop watch, lap times) The battery in the speedometer is
discharged
–
Change the speedometer battery. ( p. 98)
The high beam, low beam, parking
light, tail light, and license plate
lamp are not working Fuse 3 blown
–
Change the fuses of individual power
consumers. (
p. 95)
The speedometer, horn, brake
light, turn signal, and radiator fan
(optional) are not working Fuse 4 blown
–
Change the fuses of individual power
consumers. (
p. 95)