Fuel Injector On-Vehicle Inspection

Remove engine cover referring to ENGINE COVER REMOVAL AND INSTALLATION .
Using sound scope (1) or such, check operating sound of injector when engine is running or cranking.
Cycle of operating sound should vary according to engine speed.

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

Fig 1: Identifying Sound Scope
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect coupler from injector, connect ohmmeter between terminals of injector and check resistance.
Resistance of injector

10.8 - 13.2 ohm at 20 °C, 68 °F

If resistance is out of specification, replace.

Fig 2: Checking Resistance Between Terminals Of Injector
Courtesy of SUZUKI OF AMERICA CORP.
Connect coupler to injector securely.
Install engine cover referring to ENGINE COVER REMOVAL AND INSTALLATION .