Suzuki TU250X Service Manual page 176

ACTIVE CONTROL INSPECTION
1) Set up the SDS tool. (Refer to the SDS operation manual for
further details.)
2) Turn the ignition switch ON.
3) Click "Secondary throttle operating control" 1.
4) Click each button 2.
At this time, if an operation sound is heard from the STVA,
the function is normal.
FI SYSTEM DIAGNOSIS 4-55