Checking The Ignition Coil - KTM 450 SX ATV 2010 Repair Manual

39/IGNITION SYSTEM

Checking the ignition coil

26.4
–
Check the alternator. (
–
Check the spark plug connector. (
–
Change the spark plug.
–
Connect the spark plug connector with the ignition wire again. Unscrew the spark
plug and insert it into the spark plug connector. Touch the spark plug to ground.
–
Press the electric starter button.
Info
Do not open the throttle.
–
Check the ignition spark.
» If an ignition spark is not visible:
301569-10 –
Change the spark plug.
Condition
All plug contacts must be free of corrosion and the plug-in connectors must be firmly
seated.
The battery must be charged.
–
Remove the fuel tank. (
–
Remove the spark plug connector.
–
Measure the primary winding with a multimeter.
Ignition coil - primary winding
Ground - ignition coil input at:
20 °C (68 °F)
» If the measured value differs from the set value:
–
Change the ignition coil.
301572-10
–
Measure the secondary winding with a multimeter.
Ignition coil - secondary winding
Ignition wire - ignition coil input at:
20 °C (68 °F)
» If the measured value differs from the set value:
–
Change the ignition coil.
301573-10
–
Connect the special tool to the multimeter.
Peak voltage adapter (58429042000) (
Info
When using the peak voltage adapter, the measurement range of the multi-
meter should be set to DCV.
–
Follow the instructions on starting the engine.
–
Touch the red measuring lead of the special tool to ground. Touch the black mea-
301574-10
suring lead to the ignition coil input.
Ignition coil
Ground - ignition coil input
» If the displayed value does not meet specifications:
–
Change the ignition coil.
p. 190)
p. 189)
p. 64)
0.25... 0.35 Ω
5... 7.5 kΩ
p. 228)
190... 210 V
188