Fuel Injector On-Vehicle Inspection

Using sound scope (1) or the like, check operating sound of injector (2) when engine is running or cranking.
Cycle of operating sound should vary according to engine speed.

If no sound or unusual sound is heard, check injector circuit (wire or connector) or injector.

Fig 1: Identifying Fuel Injector And Sound Scope
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect connector (1) from injector.
Check resistance between terminals of injector.
If resistance is out of reference value greatly, replace.

Reference resistance of fuel injector

11.6 - 12.4 Ω at 20°C, 68°F

Fig 2: Checking Resistance Between Terminals Of Injector
Courtesy of SUZUKI OF AMERICA CORP.
Connect connector to injector securely.