Suzuki GSX1300BK B-King Service Manual page 149

1A-78 Engine General Information and Diagnosis:
P1654-H (Use of SDS)
Step
1 7) 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 (
8) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-2)".
Is the continuity OK?
Action
)
Yes
Go to Step 3.
(A)
I823H1110064-03
No
Y/W wire shorted to
VCC, or B/Br wire open.