Troubleshooting - Suzuki DF9,9 Service Manual

3-4 IGNITION AND ELECTRICAL

TROUBLESHOOTING

Perform the following ignition system tests when the engine is hard to start in order to determine if the cause
is in the ignition or another system.
START
Check the spark condition.
No or weak sparks
Check if the spark plug is in good condition.
(See page 2-7.)
OK
Disconnect the engine stop switch lead wire
connector. (Blue/Red, B).
No or weak sparks
Check the ignition coil resistance.
(See page 3-7.)
[Primary: 0.2 – 0.4 Ω]
[Secondary: 6.8 – 10.2 kΩ]
OK
Check the spark plug cap for any evidence
of the high-tension leak.
OK
Check the spark plug cap resistance.
(See page 3-8.)
[Cap resistance: 8 – 12 kΩ)]
OK
Check the condenser charge coil resistance.
(See page 3-5.)
[Coil resistance: 12.5 – 18.8 Ω]
OK
Check the pulser coil resistance.
(See page 3-6.)
[Coil resistance: 148 – 222 Ω]
OK
Check the CDI unit. (See page 3-7.)
The cause will not be in the ignition
system.
Check the ignition timing by using
the timing light.
[ATDC 5˚ at 1 000 r/min]
Not good
Replace the spark plug with a new one.
Sparks
Check and/or replace the engine stop
switch. (See page 3-8.)
Out of spec.
Replace the ignition coil.
Not good
Replace the spark plug cap.
Out of spec.
Out of spec.
Replace the condenser charge coil.
Out of spec.
Replace the pulser coil.
Out of spec.
Replace the CDI unit.
Not good