Ignition System Troubleshooting - Honda 1984 Shadow VT700C Manual

IGNITION SYSTEM
TROUBLESHOOTING
The ignition system has two sub-systems; one for
the No.1 cylinder and one fo r the No.2 cyl inder .
Determine which sub-system is faulty . then proceed
to the detailed tests below.
Engi ne crankl but
will
not start
1. Engine stOP switch
OFF .
2. No spark at plugs.
3. Fau lty transistorized spark unit.
4 . F lulty pulse generator.
No spark at plug
1. Engine stop swtich OFF .
2. Poor ly connected, broken or shorted wires.
Between ignition switch and engine stop switch.
Between spark unit and engine stop switch.
Between spark un it and ignit ion coil.
Between ignition coil and plug ,
Betwee n spark unit and pulse generator.
3. Fau lt y ign it ion coil.
4. Faulty ignition switch.
5, Fau lty spark unit.
6. Fau lty pulse generator.
Engi ne starts but ru ns poorly
1. Ignit ion primary circuit.
Faulty ignition coil.
- l oose or bare wire.
- Intermittent short circuit.
2. Secondary circuit.
Fau lt y plug.
- Faulty spark plug wire.
Timing advance incorrect
1. Faulty pulse generator.
2. Faulty spark unit.
19-2