15-11 ELECTRICAL SYSTEM
IGNITION SYSTEM
NOTE:
The fuel cut-off circuit is incorporated in this ECM in order to prevent over-running of engine.
TROUBLESHOOTING
No spark or poor spark
Step 1
1) Check the ignition system couplers for poor connections.
Is there connection in the ignition system couplers?
Step 2
1) Measure the ignition coil primary peak voltage. (!15-13)
Is the peak voltage OK?
Step 3
1) Inspect the spark plug. (!2-7)
Is the spark plug OK?
YES Go to Step 2.
NO Poor connection of couplers
YES Go to Step 3.
NO Go to Step 4.
YES
• Poor connection of the spark plug
• Go to Step 4.
NO Faulty spark plug
Magneto
ECT
sensor
TP
sensor
GP
switch
CKP sensor
Ignition coil
ECM
Engine
stop
switch
Regulator
/rectifier
Condenser
Crankshaft rotation
signal sensor
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