KYMCO Downtown 125i 2009 Service Manual page 234

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18
. IGNITION SYSTEM
TROUBLESHOOTING
LOW PEAK VOLTAGE
● Cranking speed is too low (battery is undercharged).
● Poorly connected connectors or an open circuit in the ignition system.
● Faulty ignition-coil.
● Faulty ignition control module.
NO PEAK VOLTAGE
● Short circuit in engine stop switch or ignition switch wire.
● Faulty engine stop switch or ignition switch.
● Loose or poorly connected ignition control module connectors.
● Open circuit or poor connection in ground wire of the ignition control module.
● Faulty ignition pulse generator.
● Faulty ignition control module.
PEAK VOLTAGE IS NORMAL, BUT NO SPARK JUMPS AT THE PLUG
● Faulty spark plug or leaking ignition coil secondary current.
● Faulty ignition coil.
18-3
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DOWNTOWN 125 i