Suzuki GSF650A Service Manual page 140

1A-65 Engine General Information and Diagnosis:
Step
2 1) Turn the ignition switch OFF.
2) Check the IAT sensor coupler for loose or poor contacts.
If OK, then check the IAT sensor lead wire continuity.
3) Disconnect the IAT sensor coupler.
4) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
5) Insert the needle pointed probes to the lead wire coupler.
6) Check the continuity between the Dg wire "B" and
terminal 27. Also, check the continuity between the B/Br
wire "A" 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)
"A"
(B)
"27"
Is the continuity OK?
Action
)
"B"
"29"
Yes
Connect the ECM
coupler and go to Step
3.
I717H1110013-02
(A)
I718H1110060-03
No
Dg or B/Br wire open.