Suzuki GSX-R750 Service Manual page 195

4) Disconnect the IAP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the R wire and ground.
7) If OK, then measure the voltage at the R wire A and B/Br
wire B.
 IAP sensor input voltage: 4.5 – 5.5 V
 09900-25008: Multi-circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
YES Go to Step 2.
• Loose or poor contacts on the ECM coupler
(terminal A or S).
NO
• Open or short circuit in the R wire or B/Br wire.
Step 1 (When indicating P0105-H:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the IAP sensor coupler for loose or poor contacts.
If OK, then check the IAP sensor lead wire continuity.
4) Disconnect the IAP sensor coupler.
5) Check the continuity between R wire A and G/B wire C.
If the sound is not heard from the tester, the circuit condition
is OK.
(+ R – - Ground)
(+ R – - B/Br)
FI SYSTEM DIAGNOSIS
1
V
1
1
4-39
!