Suzuki GSX-R750 Service Manual page 111

Step
1 6) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
7) Insert the needle pointed probes to the lead wire coupler.
8) Check the continuity between the G/B wire and terminal
"19".
If OK, then check the continuity between the B/Br wire
and terminal "35".
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity test (
ECM couplers (Harness side)
(B)
"19"
(Black)
Is the continuity OK?
Action
)
?
(A)
"35"
(Gray)
I837H1110017-01
Engine General Information and Diagnosis:
Yes
Go to Step 3.
1A-39
No
G/B wire shorted to
VCC, or B/Br wire open.