KEEWAY 500ATV, Service Manual

Page: 194 / 218

12. IGNITION SYSTEM
12-4
Inspection of ignition system
Note:
● If there is no spark at the plug, check all connections
for loose or poor contact before measuring the peak
voltage.
● Use the recommended digital multimeter or a
commercially available digital multimeter with an
impedance of 10M
Ω /DCV minimum.
●
The display voltage tester or connect the peak
voltage adaptor to the digital multimeter.
Special tools
Peak voltage oscillograph
(Use together with digital multimeter available from
the market with input impedance over 10M
Ω
·
DCV)
Ignition Coil Primary Voltage
Note:
● Measure after all the wires are correctly connected.
●
Inspection should be done when the spark plug
and spark plug cap are properly installed. If the spark
plug is removed, the peak voltage will rise.
Remove the store box cover. (2-8)
Keep spark plug in the cylinder head, install quali -
fied spark plug on the spark plug cap and earth the
engine.
Open rubber cover of ignition coil, keep the ignition wire
connected, and connect peak voltage oscillograph
between primary wire terminal and frame body earth
wire.
Special tool
Peak voltage oscillograph
(Use together with digital multimeter available from
the market with input impedance over 10M/DCV)
Connecting terminals: black/yellow (+) –frame earth
wire(-)
Turn ignition switch to the ON position, and start engine.
Peak voltage above150V