Suzuki GSX-R750 Service Manual page 115

Step
3 1) Turn the ignition switch OFF.
2) Connect the ECM coupler and IAP sensor coupler.
3) Insert the needle pointed probes to the lead wire coupler.
4) Run the engine at idle speed and measure the IAP
sensor output voltage between the G/B wire and B/Br
wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
IAP sensor output voltage
Approx. 2.7 V at idle speed
((+) terminal: G/B – (–) terminal: B/Br)
Is the voltage OK?
Action
(A)
V
(B)
Engine General Information and Diagnosis:
Yes
Go to Step 4.
I837H1110020-01
1A-43
No
• Check the vacuum
hose for crack or
damage.
• Open or short circuit
in the G/B wire.
• If vacuum hose and
wire are OK, replace
the IAP sensor with a
new one. Refer to
"IAP Sensor Removal
and Installation in
Section 1C
(Page 1C-3)".