Suzuki GSX-R750, Service Manual

Page: 355 / 495

7-24 ELECTRICAL SYSTEM
Peak volt
adaptor
ECM
IG coil
To engine
stop switch
Inspect each ignition coil primary peak voltage at the ignition
coil/plug cap coupler.
• Connect the multi circuit tester with peak voltage adaptor as
follows.
No.1 ignition coil/plug cap:
W/Bl terminal (
+
Probe) – Ground (
-
Probe) terminal
No.2 ignition coil/plug cap:
B terminal (
+
Probe) – Ground (
-
Probe) terminal
No.3 ignition coil/plug cap:
Y terminal (
+
Probe) – Ground (
-
Probe) terminal
No.4 ignition coil/plug cap:
G terminal (
+
Probe) – Ground (
-
Probe) terminal
09900-25008: Multi circuit tester set
Tester knob indication: Voltage ( )
When using the multi circuit tester and peak volt adap-
tor, follow the instruction manual.
NOTE:
* When connecting the multi circuit tester, insert the stings (O.D
is below 0.5 mm) to the back side of the ignition coil lead wire
coupler and connect the tester probes to them.
* Use the sting, its outer diameter being below 0.5 mm, to pre-
vent the rubber of the water proof coupler from damage.
• Shift the transmission into neutral and turn ignition switch “ON”.
• Crank the engine a few seconds with the starter motor by de-
pressing starter button and check the ignition coil primary peak
voltage.
• Repeat the above inspection a few times and measure the high-
est peak voltage.
Ignition coil primary peak voltage: More than 80 V
Do not touch the tester probes and spark plugs to pre-
vent an electric shock while testing.
If the peak voltage is lower than the standard range, check the
peak voltage at the ECM coupler.