Suzuki GSF650A Service Manual page 158

1A-83 Engine General Information and Diagnosis:
P1654-L (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. 0% 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
I718H1110199-01
I717H1110025-01
Yes
Go to Step 2.
Go to Step 3.
No
Go to Step 4.
R or Y/W wire open, or
Y/W wire shorted to the
ground.