21 TROUBLESHOOTING 115
Faults Possible cause Action
The engine cannot be cranked (elec-
tric starter)
Operating error – Carry out the start procedure. ( p. 36)
Battery is discharged – Recharge the battery. ( p. 94)
– Check the charging voltage.
– Check the closed current.
– Check the stator winding of the alternator.
Main fuse blown – Change the main fuse. ( p. 95)
Starter relay defective – Check the starter relay.
Starter motor defective – Check the starter motor.
The engine turns but does not start Operating error – Carry out the start procedure. ( p. 36)
The plug-in connection of the fuel
hose connection is not connected
– Connect the plug-in connection of the fuel line.
Fuse 1 blown – Change the fuses of individual power
consumers. ( p. 96)
Fuse 4 blown – Change the fuses of individual power
consumers. ( p. 96)
Idle speed is not set correctly – Adjust the idle speed. ( p. 106)
Spark plug oily or wet – Clean and dry the spark plug or replace if nec-
essary.
Electrode distance (plug gap) of spark
plug too wide
– Adjust the plug gap.
Guideline
Spark plug electrode gap
1.0 mm (0.039 in)
Ignition system defective – Check the ignition system.
Short-circuit cable in wiring harness
frayed, kill switch or emergency OFF
switch defective
– Check the wiring harness. (visual check)
– Check the electrical system.
Defect in fuel injection system – Read out the fault memory using the KTM diag-
nostics tool.
Engine does not speed up Defect in fuel injection system – Read out the fault memory using the KTM diag-
nostics tool.
Ignition system defective – Ignition coil - check the secondary winding.
– Check the spark plug connector.
– Check the stator winding of the alternator.
Engine has too little power Air filter heavily contaminated – Clean the air filter and air filter box.
( p. 66)
Fuel filter is very dirty – Change the fuel filter.
Fuel screen is very dirty – Change the fuel screen. ( p. 108)
Defect in fuel injection system – Read out the fault memory using the KTM diag-
nostics tool.
Exhaust system leaky, deformed or
too little glass fiber yarn filling in
main silencer
– Check exhaust system for damage.
– Change glass fiber yarn filling in the main
silencer. ( p. 67)
Valve clearance too little – Adjust the valve clearance.
Ignition system defective – Ignition coil - check the secondary winding.
– Check the spark plug connector.
– Check the stator winding of the alternator.
The engine dies during the trip Lack of fuel – Refuel. ( p. 40)
Fuse 1 blown – Change the fuses of individual power
consumers. ( p. 96)
Fuse 4 blown – Change the fuses of individual power
consumers. ( p. 96)
Engine overheats Coolant level low in cooling system – Check the cooling system for leaks.
– Check the coolant level. ( p. 102)
Insufficient airflow – Switch off engine when stationary.
Radiator fins very dirty – Clean radiator fins.
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