Suzuki SFV650, Service Manual

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Ignition System: 1H-2
Component Location
Ignition System Components Location
B944H11803003
Refer to “Electrical Components Location in Section 0A (Page 0A-7)”.
Diagnostic Information and Procedures
Ignition System Symptom Diagnosis
B944H11804001
Condition Possible cause Correction / Reference Item
Spark plug not sparking Damaged spark plugs. Replace.
Fouled spark plugs. Clean or replace.
Wet spark plugs. Clean and dry or replace.
Defective ignition coils or spark plug
caps. Replace.
Defective CKP sensor. Replace.
Defective ECM. Replace.
Open-circuited wiring connections. Repair or replace.
Open or short in high-tension cord. Replace.
Engine stalls easily (No
spark) Defective ignition coils. Replace.
Fouled spark plugs. Clean or replace.
Defective CKP sensor. Replace.
Defective ECM. Replace.
Open-circuited wiring connections. Repair or replace.
Spark plug is wet or
quickly becomes fouled
with carbon Excessively rich air/fuel mixture. Inspect FI system.
Excessively high idling speed. Inspect FI system.
Incorrect gasoline. Change.
Dirty air cleaner element. Clean or replace.
Incorrect spark plugs. (Cold type) Change to hot type spark plug.
Spark plug quickly
becomes fouled with oil
or carbon Worn piston rings. Replace.
Worn pistons or cylinders. Replace.
Worn cylinder. Replace.
Excessive valve-stem to valve-guide
clearance. Replace.
Worn valve stem oil seals. Replace.
Spark plug electrodes
overheat or burn Incorrect spark plugs. (Hot type) Change to cold type spark plug.
Overheated engine. Tune-up.
Loose spark plugs. Tighten.
Excessively lean air/fuel mixture. Inspect FI system.