Fuel Cut Operation Check

For A/T model, place select lever in "P" and apply parking brake.
For M/T model, place gear shift lever in "Neutral" and apply parking brake.
Warm up engine to normal operating temperature.
While listening to sound of injector (2) by using sound scope (1) or the like, increase engine speed to higher than 3, 000 rpm.

Fig 1: Listening Injector Sound Using Sound Scope
Courtesy of SUZUKI OF AMERICA CORP.
Check that injector operation sound stops when throttle valve is closed instantly and it is heard again when engine speed is reduced to approx. 2, 000 rpm or less.