On Vehicle Inspection

1. INSPECT INJECTOR OPERATION.
- Check operation sound from each injector.
- With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to engine speed.





- If you have no sound scope, you can check the injector transmission operation with your finger.
- If no sound or an unusual sound is heard, check the wiring connector, injector or injection signal from the ECM.





2. INSPECT INJECTOR RESISTANCE.
- Disconnect the injector connector.
- Using an ohmmeter, measure the resistance between the terminals.

Resistance: 13.4 - 14.2 Ohms at 20°C (68°F)

- If the resistance is not as specified, replace the injector.
- Reconnect the injector connector.