Suzuki GSF650A Service Manual page 157

Step
2 3) Disconnect the STP sensor coupler.
4) Check the continuity between the Y/W wire and R wire.
If the sound is not heard from the tester, the circuit
condition is OK.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Continuity (
5) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
6) Check the continuity between the Y/W wire "A" and
terminal 20. Also, check the continuity between the B/Br
wire "B" and terminal 29.
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"
(B)
"20"
Is the continuity OK?
Action
)
)
"A"
"29"
Engine General Information and Diagnosis:
Yes
Go to Step 4.
(A)
I718H1110088-04
(A)
I718H1110089-04
1A-82
No
Y/W wire shorted to
Vcc, or B/Br wire open.