21 TROUBLESHOOTING
142
Faults Possible cause Action
The engine cannot be cranked
(electric starter)
Operating error – Carry out the start procedure.
( p. 42)
Battery is discharged – Recharge the battery. ( p. 113)
– Check the charging voltage.
– Check the open-circuit current.
– Check the stator winding of the alter-
nator.
Main fuse blown – Change the main fuse. ( p. 115)
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. 42)
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. 116)
Fuse 4 blown –
Change the fuses of individual power
consumers. ( p. 116)
Idle speed is not set correctly – Adjust the idle speed. ( p. 130)
Spark plug oily or wet – Clean and dry the spark plug or replace
if necessary.
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 defec-
tive
– Check the wiring harness. (visual
check)
– Check the electrical system.
Defect in fuel injection system – Read out the fault memory using the
KTM diagnostics tool.
Engine does not speed up Defect in fuel injection system – Read out the fault memory using the
KTM diagnostics tool.
Ignition system defective – Ignition coil - check the secondary
winding.
– Check the spark plug connector.
– Check the stator winding of the alter-
nator.
Engine has too little power Air filter heavily contaminated – Clean the air filter and air filter box.
( p. 79)
Fuel filter is very dirty – Change the fuel filter.
Fuel screen is very dirty – Change the fuel screen. ( p. 133)
Defect in fuel injection system – Read out the fault memory using the
KTM diagnostics tool.
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