Suzuki GSX-R750 Service Manual page 196

4-40 FI SYSTEM DIAGNOSIS
6) Disconnect the ECM coupler.
7) Check the continuity between G/B wire C and terminal 9.
8) If OK, then check the continuity between B/Br wire B and ter-
minal S.
 IAPS lead wire continuity: Continuity ()
 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
 Tester knob indication: Continuity test ()

When using the multi-circuit tester, do not storongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
Is the continuity OK?
YES Go to Step 2.
NO G/B wire shorted to VCC, or B/Br wire open.
9) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Step 1 (When indicating P0105-L:)
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 G/B wire C and ground.
6) Also, check the continuity between G/B wire C and B/Br wire
B. If the sound is not heard from the tester, the circuit condi-
tion is OK.
1
(Black)
ECM couplers (Harness side)
1
1
V
!
(Gray)