Fuel Injector: Testing and Inspection

Measurement of Resistance between Terminals
1. Remove the injector connector.
2. Measure the resistance between terminals.

Standard value: 11 - 15 ohm [at 20°C (68°F)]

3. Install the injector connector




Checking operation sound
Using a stethoscope or long blade screwdriver, check the operation sound ("tick-tick-tick") of injectors during idling or during cranking Check that as the engine speed increases, the frequency of the operating sound also increases.

CAUTION: Note that even if the injector you are checking is not operating, you will hear the operating sound of the other injectors.

NOTE: If no operating sound is heard from the injector that is being checked, check the injector drive circuit. If there is nothing wrong with the circuit, a defective injector or PCM is suspected