Suzuki GSX-R750 Service Manual page 141

Step
3 1) Turn the ignition switch OFF.
2) Connect the ECM coupler and AP sensor coupler.
3) Insert the needle pointed probes to the lead wire coupler.
4) Run the engine at idle speed and measure the AP
sensor output voltage between the G/Y 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 ( )
AP sensor output voltage
Approx. 3.6 V at 100 kPa (760 mmHg)
((+) terminal: G/Y – (–) terminal: B/Br)
V
Is the voltage OK?
Action
(A)
(B)
I837H1110046-01
Engine General Information and Diagnosis:
Yes
Go to Step 3.
1A-69
No
• Check the vacuum
port for crack or
damage.
• Open or short circuit
in the G/Y wire.
• If vacuum hose and
lead wire are OK,
replace the AP
sensor with a new
one. Refer to "AP
Sensor Removal and
Installation in Section
1C (Page 1C-6)".