Suzuki GSF1250 Service Manual page 108

1A-39 Engine General Information and Diagnosis:
P0120-H (Use of SDS)
Step
1 1) Click the data monitor button (1).
2) Check the throttle position data.
Throttle position approx. 125
2 1) Turn the ignition switch OFF.
2) Check the TP sensor coupler for loose or poor contacts.
If OK, then check the TP sensor lead wire continuity.
3) Disconnect the TP sensor coupler.
Action
1
I718H1110251-01
I718H1110169-01
°
and more OK?
I718H1110168-03
Yes
Go to Step 2.
Go to Step 4.
No
Go to Step 4.
P/B wire shorted to Vcc,
or B/Br wire open.