Honda V30 Magna VF500C Manual page 272

IGNITION SYSTEM
TROUBLESHOOTING
The ignition system is two sub-systems; one for
the No.1 and No.3 cylinders and one for the No.2
and No.4 cylinders. Determine which sub-system is
faulty, then proceed to the guide below.
Engine-cranks but will not start
1. Engine stop switch 0 F F
2. No spark at plug
3. Faulty transistorized spark unit
4. Faulty pulse generator
No spark at plug
1. Engine stop switch 0 F F
2. Poorly connected, broken or shorted wires
Between ignition switch and engine stop switch
Between spark unit and engine stop switch
Between spark unit and ignition coil
Between ignition coil and plug
Between spark unit and pulse generator
3. Faulty ignition coil
4. Faulty ignition switch
5. Faulty spark unit
6. Faulty pulse generator
Engine starts but runs poorly
1. ignition primary circuit
Faulty ignition coil
• Loose or bare wire
• intermittent short circuit
2. Secondary circuit
Faulty plug
• Faulty high tension wire
Timing advance incorrect
1. Faulty pulse generator
2. Faulty spark unit
16-2
~HONDA
~
V30 MAGNA
Date of Issue: July, 1984
© HONDA MOTOR CO., LTD.