Ignition System; Troubleshooting - Suzuki AN650 2002 Service Manual

10-18 ELECTRICAL SYSTEM

IGNITION SYSTEM

CKP
sensor
Cam position
sensor
NOTE:
The ignition cut-off circuit is incorporated in this ECM to prevent over-running of engine. If engine rpm
reaches 8 000 r/min., this circuit cuts off ignition primary current for all spark plugs.
Under no load, the engine can run over 8 000 r/min, even if the ignition cut-off circuit is effec-
tive, and it may cause engine damage. Do not run the engine without load over 8 000 r/min at
anytime.

TROUBLESHOOTING

No spark or poor spark
Check the ignition system couplers for
poor connections.
Correct
Continued on next page
ECM
Wave form
arrangement
circuit
Wave form
arrangement
circuit
Throttle
position
sensor
Make sure the engine stop switch is in the "RUN" position
and side-stand is in up-right position. Grasp the front
or rear brake lever. Make sure the fuse is not blown
and the battery is fully-charged before diagnosing.
Power source
circuit
CPU
Engine
CVT control
coolant
unit
temp. sensor
Loose
• Improper coupler connection
Engine stop switch
Ignition
fuse
Ignition
switch
#1
Main
fuse
Battery
#2