Fuel Cut Operation Inspection

WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before inspection, check to make sure that gear shift lever is in Neutral position (with A/T model, selector lever in "P" range) and that parking brake lever is pulled all the way up.

Warm up engine to normal operating temperature.
While listening to sound of injector by using sound scope (1) or such, increase engine speed to higher than 3000 r/ min. (rpm).
Check to make sure that sound to indicate operation of injector stops when throttle valve is closed instantly and it is heard again when engine speed is reduced to less than about 2000 r/min. (rpm).

Fig 1: Checking Fuel Cut Operation Using Sound Scope
Courtesy of SUZUKI OF AMERICA CORP.