Suzuki Boulevard M50, Service Manual

Page: 401 / 454

SERVICING INFORMATION 10-13
ELECTRICAL
Complaint Symptom and possible causes Remedy
No sparking or poor
sparking 1. Defective ignition coils or CKP sensor
2. Defective spark plugs
3. Defective ECM
4. Defective tip over sensor
5. Open-circuited wiring connections Replace.
Replace.
Replace.
Replace.
Check and repair.
Spark plug soon
become fouled with
carbon. 1. Mixture too rich
2. Idling speed set too high
3. Incorrect gasoline
4. Dirty element in air cleaner
5. Too cold spark plugs
Inspect FI system.
Adjust fast idle or throttle
stop screw.
Change.
Clean or replace.
Replace with hot type plug.
Spark plug become
fouled too soon. 1. Worn piston rings
2. Worn piston or cylinders
3. Excessive clearance of valve stems in valve
guides
4. Worn stem oil seal
Replace.
Replace.
Replace.
Replace.
Spark plug elec-
trodes overheat or
burn. 1. Too hot spark plugs
2. Overheated engine
3. Loose spark plugs
4. Too lean mixture
Replace with cold type
plugs.
Tune-up.
Retighten.
Inspect FI system.
Generator does not
charge. 1. Open or short lead wires, or loose lead connec-
tions.
2. Shorted, grounded or open generator coils
3. Shorted or punctured regulator/rectifier
Repair or replace or
retighten.
Replace.
Replace.
Generator does
charge, but charg-
ing rate is below the
specification. 1. Lead wires tend to get shorted or open-circuited
or loosely connected at terminals
2. Grounded or open-circuited generator coils or
generator
3. Defective regulator/rectifier
4. Defective cell plates in the battery
Repair or retighten.
Replace.
Replace.
Replace the battery.
Generator
overcharges 1. Internal short-circuit in the battery
2. Damaged or defective regulator/rectifier
3. Poorly grounded regulator/rectifier Replace the battery.
Replace.
Repair, replace, or
connect properly.
Unstable charging 1. Lead wire insulation frayed due to vibration,
resulting in intermittent shorting
2. Internally shorted generator
3. Defective regulator/rectifier
Repair or replace.
Replace.
Replace.
Starter button is not
effective. 1. Run down battery
2. Defective switch contacts
3. Not seating properly brushes on commutator in
starter motor
4. Defective starter relay/starter interlock switch
5. Defective main fuse
Repair or replace.
Replace.
Repair or replace.
Replace.
Replace.
SA
MP
LE