VL1500K5 (’05-MODEL) 133
IGNITION SYSTEM
NOTE:
The fuel cut-off circuit is incorporated in this ECM in order to prevent over-running of engine. When engine
speed reaches 5 800 – 6 000 r/min during running, this circuit cuts off fuel at the fuel injector.
TROUBLESHOOTING
No spark or poor spark
NOTE:
Check that the transmission is in neutral and the engine stop switch is in the “RUN” position. Squeeze the
clutch lever. Check that the fuse is not blown and the battery is fully-charged before diagnosing.
Step 1
1) Check the ignition system couplers for poor connections.
Is there connection in the ignition switch couplers?
YES
Go to Step 2.
NO
Poor connection of couplers
ECM
Throttle
position
sensor
Engine
oil temp.
sensor
Gear
position
switch
Engine stop switch
Side-
stand
relay
Fuse
Fuse
Ignition
switch
Ignition
coil
Spark plug
Battery
Wave form
arrangement
circuit
CPU
Power source
circuit
CKP
sensor
#1
#2
SA
MP
LE
