KTM 500 EXC-F 2018 Owner's Manual page 147

Faults
Engine has too little power
The engine dies during the trip
Engine overheats
Malfunction indicator lamp
lights up or flashes
High oil consumption
Battery discharged
Possible cause
Exhaust system leaky,
deformed or too little glass
fiber yarn filling in main
silencer
Valve clearance too little
Ignition system defective
Lack of fuel
Fuse 1 blown
Fuse 4 blown
Coolant level low in cooling sys-
tem
Insufficient airflow
Radiator fins very dirty
Foam formation in cooling sys-
tem
Bent radiator hose
Thermostat defective
Defect in radiator fan system
Defect in fuel injection system
Engine vent hose bent
Engine oil level too high
Engine oil too thin (low viscos-
ity)
Piston and cylinder worn
Battery is not being charged by
alternator
Undesired power consumer
21 TROUBLESHOOTING
Action
–
Check exhaust system for damage.
–
Change glass fiber yarn filling in the
main silencer. ( p. 81)
–
Adjust the valve clearance.
–
Ignition coil - check the secondary
winding.
–
Check the spark plug connector.
–
Check the stator winding of the alter-
nator.
–
Refuel. ( p. 46)
–
Change the fuses of individual power
consumers. ( p. 118)
–
Change the fuses of individual power
consumers. ( p. 118)
–
Check the cooling system for leaks.
–
Check the coolant level. (
–
Switch off engine when stationary.
–
Clean radiator fins.
–
Drain the coolant. (
–
Refill the coolant. (
–
Change the radiator hose.
–
Check the thermostat.
Guideline
Opening temperature: 70 °C (158 °F)
–
Check the radiator fan fuse.
–
Check fuse 4.
–
Check the radiator fan.
–
Stop the motorcycle and identify the
faulty part using the blink code.
–
Check the cabling for damage and the
electrical plug-in connectors for corro-
sion and damage.
–
Read out the fault memory using the
KTM diagnostics tool.
–
Route the vent hose without bends or
replace it if necessary.
–
Check the engine oil level. (
–
Change the engine oil and oil filter and
clean the oil screens. (
–
Measure the piston/cylinder mounting
clearance.
–
Check the charging voltage.
–
Check the stator winding of the alter-
nator.
–
Check the open-circuit current.
p. 126)
p. 126)
p. 127)
p. 136)
p. 136)
145