On-Vehicle Inspection

1. 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.




2. Disconnect coupler from injector, connect ohmmeter between terminals of injector and check resistance If resistance is out of specification, replace.

Resistance of fuel injector
13 - 16 Ohm at 20 °C (68 °F)

3. Connect coupler to injector securely.