Fuel Injector: Testing and Inspection
Measurement of Resistance Between Terminals1. Remove the injector connector.
2. Measure the resistance between terminals.
Standard value: 11-15 ohms 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.