Suzuki AN400 Service Manual page 111

Engine General Information and Diagnosis: 1A-48
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".
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4) Click each button (1).
At this time, if an operation sound is heard from the STVA, the function is normal.
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