Suzuki GSX-R750 Service Manual page 137

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/Y wire and terminal
"20".
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 coupler (Harness side)
(B)
(Black)
Is the continuity OK?
Action
)
?
(A)
"20"
"35"
(Gray)
Engine General Information and Diagnosis:
Yes
Go to Step 2.
I837H1110043-01
1A-65
No
G/Y wire shorted to
VCC, or B/Br wire open.