Suzuki GSF650S Service Manual page 270

Measure ignition coil primary peak voltage (for #2 and #3 cylin-
ders) in the same manner as for cylinders #1 and #4.
Ignition coil (for #2 and #3 cylinders):
B/Y terminal – Ground
(+ Probe)
NOTE:
Do not disconnect the ignition coil primary lead wire.
$ Ignition coil primary peak voltage: 140 V and more
' Tester knob indication: Voltage (&)
1
Do not touch the tester probes and spark plugs to pre-
vent an electric shock while testing.
If the voltages are lower than the standard values, inspect the
ignition coil and the signal generator.
IGNITION COIL RESISTANCE
• Measure the ignition coil resistance in both the primary and
secondary windings. If the windings are in sound condition,
their resistance should be close to the specified values.
$ Ignition coil resistance
Primary: Approx. 2 – 4 Ω (+ tap – - tap)
Secondary: Approx. 30 – 40 kΩ
0 Tester knob indication: Resistance (Ω)
SIGNAL GENERATOR PEAK VOLTAGE
• Remove the battery.
• Disconnect the ignitor coupler 1.
• Reconnect the battery.
NOTE:
Make sure that all of the couplers are connected properly and
the battery is fully-charged.
• Connect the multi circuit tester with the peak volt adaptor as
follows.
B/Bl (+ Probe) – Y/W (- Probe)
" 09900-25008: Multi circuit tester set
#
Before using the multi circuit tester and peak voltage
adaptor, refer to the appropriate instruction manual.
(- Probe)
(spark plug cap – spark plug cap)
ELECTRICAL SYSTEM
Ignitor
Signal
coupler
generator
coupler
Signal
generator
6-33
Peak
volt
adaptor