Honda CBF150 2002 Manual page 296

IGNITION SYSTEM
TROUBLESHOOTING
Inspect the following before diagnosing the system.
– Faulty spark plug
– Loose spark plug cap or spark plug wire
– Water got into the spark plug cap (Leaking the ignition coil secondary voltage)
No spark at plug
Unusual condition
Ignition coil Low peak voltage.
primary
voltage
No peak voltage.
Peak voltage is normal, but no spark
jumps at the plug.
Ignition pulse Low peak voltage.
generator
No peak voltage.
16-4
Probable cause (check in numerical order)
1. The multimeter impedance is too low; below 10 MΩ/
DCV.
2. Cranking speed is too slow.
3. The sampling time of the tester and measured pulse
were not synchronized. (System is normal if measured
voltage is over the standard voltage at least once.)
4. Poorly connected connectors or an open circuit in the
ignition system.
5. Faulty ignition coil.
6. Faulty ignition control module (ICM) (in case when
above No. 1 – 5 are normal).
1. Incorrect peak voltage adapter connections.
2. Battery is undercharged.
3. Faulty ignition switch.
4. Loose or poorly connected ICM connectors.
5. Open circuit or poor connection in the Red/Black wire
of the ICM.
6. Open circuit or poor connection in the green wire of
the ICM.
7. Faulty peak voltage adapter.
8. Faulty ignition pulse generator. (Measure the peak
voltage.)
9. Faulty ICM (in case when above No.1 – 8 are normal).
1. Faulty spark plug or leaking ignition coil secondary
current.
2. Faulty ignition coil.
1. The multimeter impedance is too low.
2. Cranking speed is too slow.
3. The sampling time of the tester and measured pulse
were not synchronized. (System is normal if measured
voltage is over the standard voltage at least once.)
4. Faulty ignition pulse generator (in case when above
No.1 – 3 are normal).
1. Faulty peak voltage adapter.
2. Faulty ignition pulse generator.