Suzuki GSX1300BK B-King Service Manual page 190

Step
4 8) Then, to set the EXCV to fully opened position, apply 12
V to the terminals oppositely.
Positive wire – Gr wire terminal
Negative wire – P wire terminal
9) Measure the EXCVA position sensor output voltage at
EXCV fully opened position.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
EXCVA position sensor output voltage
EXCV is fully opened: 3.6 – 4.55 V
((+) Y – (–) W)
Is the voltage OK?
Action
(A)
(B)
Engine General Information and Diagnosis:
Yes
Replace the ECM with a
known good one, and
inspect it again.
I823H1110166-01
I823H1110165-02
1A-119
No
Go to Step 5.