Suzuki GSF650A Service Manual page 156

1A-81 Engine General Information and Diagnosis:
P1654-H (Use of SDS)
Step
1 1) Click the data monitor button (1).
2) Check the secondary throttle actuator position sensor
data.
Secondary throttle position approx. 100% and more OK?
2 1) Turn the ignition switch OFF.
2) Check the STP sensor coupler for loose or poor
contacts.
If OK, then check the STP sensor lead wire continuity.
Action
1
I718H1110251-01
I718H1110198-01
I717H1110024-01
Yes
Go to Step 2.
Go to Step 4.
No
Go to Step 4.
Y/W wire shorted to
Vcc, or B/Br wire open.