Troubleshooting - Yamaha VK540EF Service Manual

TROUBLESHOOTING

Check the spark plug gap.
OUT OF SPECIFICATION
OK
Check the spark plug cap resistance.
OUT OF SPECIFICATION
OK
Check the ignition coil resistance.
OUT OF SPECIFICATION
OK
Check the source coil.
FAULTY
OK
Check the engine stop switch,
throttle switch, carburetor switch
and main switch.
FAULTY
OK
Correct connection and/or replace
CDI unit and/or Rectifier/regulator.
IGNITION SYSTEM
NO SPARK OR WEAK SPARK.
Repair or replace the spark plug.
Replace the spark plug cap.
Replace the ignition coil.
Replace the source coil.
Replace the handlebar switch (right), carburetor
switch, and/or main switch.
7-3
ELEC