18. IGNITION SYSTEM DOWNTOWN 125 i
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
4.7 / 5