Honda CRF50F 2004-2015 - Troubleshooting

IGNITION SYSTEM
TROUBLESHOOTING
• Inspect the following before diagnosing the system.
- Faulty spark
plug
- Loose spark plug cap or spark plug wire connections
- Water got into the spark plug cap (leaking the ignition coil secondary voltage)
No spark
at spark plug
Unusu al co ndit ion
Probable cause (check in num erical order)
Ignition coil Low peak voltage. 1.
Incorrect peak voltage adaptor connections (System is
primary
normal if measured voltage is over the specifications
voltage
with reverse connections).
2.
The mullimeter impedance is too low; 10 MWDCV.
3. Cranking speed is too low (Operating force of the kick-
starter is weak.)
4. The sampling timing of the tester and measured pulse
were not synchronized. (Sys tem is normal if measured
voltage is over the standard voltage at least once.)
5.
Poorly connected connectors or an open circuit in igni -
tion system.
6.
Faulty exciter coil (Measure peak voltage).
7. Faulty ignition coil.
8.
Faulty ICM (in case when above No.1 - 7 are normal).
No peak voltage. 1- Incorrect peak voltage adaptor connections (System is
normal if measured voltage is over the specifications
with reverse connections).
2. Short circuit in ignition switch wire or engine stop
switch wire (Black/white).
3. Faulty ignition switch or engine stop switch.
4. Loose or poorly connected ICM connectors.
5. Open c ircuit or poor connection in ground wire (Green)
of the ICM.
6. Faulty peak voltage adaptor.
7. Faulty exciter coil. (Measure peak voltage).
8. Faulty ignition pulse generator (Measure peak voltage).
9.
Faulty ICM (in case when above NO.1 - 8 are normal).
Peak voltage is normar, but no spark 1- Faulty spark plug or leaking ignition coil secondary cur-
jumps at plug. rent ampere.
2. Faulty i gnition coil.
Exciter coil
Low peak voltage. 1- The multimeter impe dance is too low; 10 MruDCV.
2.
Cranking speed is too slow (Operating force of the kick-
starter is weak.)
3. The sampl ing timing of the tester and measured pulse
we re not synchronized. (System is normal if measured
voltage is
over the standard voltage at least once.)
4. Faulty exciter coil (in case when above No.1 - 3 are
normal).
No peak voltage. 1. Faulty peak voltage adaptor.
2. Faulty exciter coil.
Ignition pulse Low peak voltage. 1- The multimeter impedance is too low; 10 MQ/DCV.
generator 2. Cranking speed is too slow (Operating force of the kick-
starter is weak.)
3. The samp l ing timing 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).
No peak voltage. 1- Faulty peak voltage adaptor.
2. Faulty ignition pulse generator .
14-4