Suzuki GSX-R750, Service Manual, Page: 221 / 495

4-74 FI SYSTEM AND INTAKE AIR SYSTEM
V
Yellow Yellow
B/Br B/Br
12 V
Gray Gray
Pink Pink
5th step:
This procedure is only required when C28 is indicated.
• Turn the ignition switch OFF.
• Insert the two copper wires into the back side of the position
sensor lead wire coupler
1
.
• Disconnect the STVA motor lead wire coupler
2
.
• Turn the ignition switch ON.
• Measure the position sensor output voltage at fully close posi-
tion.
Position sensor output voltage.
ST valve is fully close: more than 0.2 V
(
+
Yellow –
-
B/Br)
09900-25008: Multi circuit tester
Tester knob indication: Voltage ( )
If the measured voltage is less than specification, adjust the No.2
cable adjuster as follows:
• Set the ST valve to adjustment position. (
4-61)
Adjusting the No.2 cable with the ST valve fully closed
can damage the STV actuator. Be sure to adjust the No.2
cable with the ST valve set in adjustment position.
• Turn out the No.2 cable adjuster
3
until the output voltage be-
comes specified value.
Position sensor output voltage
ST valve is fully close: 0.2 output voltage 0.8 V
B/Br
Yellow
B/Br
Yellow
• To set the ST valve to fully close position, apply 12 volts to
A
and
B
terminals.
Positive wire –––
A
(Pink wire) terminal
Negative wire –––
B
(Gray wire) terminal
To prevent the motor damage, stop to apply 12V as soon
as the ST valve reaches to fully close position.