20 TROUBLESHOOTING
128
Faults Possible cause Action
The engine cannot be cranked
(starter motor)
Operating error – Carry out start procedure. ( p. 29)
12-V battery discharged – Charge the 12-V battery. ( p. 99)
– Check the charging voltage.
– Check the closed current.
– Check the stator winding of the alter-
nator.
Main fuse blown – Change the main fuse. ( p. 101)
Starter relay faulty – Check the starter relay.
Starter motor faulty – Check the starter motor.
The engine turns but does not
start
Operating error – Carry out start procedure. ( p. 29)
Quick release coupling not
joined
– Join quick release coupling.
Idle speed is not set correctly – Adjust the idle speed. ( p. 112)
Fuel supply interrupted – Check the fuel tank breather.
Spark plug sooty or wet – Clean and dry the spark plug and
spark plug connector, or change if
necessary.
Plug gap of spark plug too
wide
– Adjust plug gap.
Guideline
Spark plug electrode gap
0.6 mm (0.024 in)
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.
Short-circuit cable in wiring
harness frayed, stop button
faulty
– Check the stop button.
The connector or ignition coil
is loose or oxidized
– Clean the connector and treat it with
contact spray.
Malfunction in the electronic
fuel injection
– Read out the fault memory using the
Husqvarna Motorcycles diagnostics
tool.
The engine has no idle speed Spark plug defective – Change the spark plug.
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.
Idle speed is not set correctly – Adjust the idle speed. ( p. 112)
Engine does not speed up Malfunction in the electronic
fuel injection
– Read out the fault memory using the
Husqvarna Motorcycles diagnostics
tool.
Ignition system defective – Check the ignition coil.
– Check the spark plug connector.
Ambient pressure is incorrectly
stored
– Program ambient air pressure.
( p. 113)
Engine has too little power Air filter very dirty – Clean the air filter and air filter box.
( p. 64)
Fuel filter is very dirty – Change the fuel filter.
Fuel screen is very dirty – Change the fuel screen. ( p. 115)
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