Injectors [DIAGRAM showing injector cross-section with labels: Connector Terminal, Fuel, Injection, Coil] ON-VEHICLE INSPECTION 1. CHECK INJECTOR OPERATION Check the operating sound from each injector. (a) With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to engine rpm. [DIAGRAM showing Sound Scope being used on engine] (b) 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, resistor (7M-GTE) or injection signal from the ECU. [DIAGRAM showing hand checking injector] 2. INSPECT RESISTANCE OF INJECTOR (a) Disconnect the injector connector. (b) Using an ohmmeter, check the resistance of both terminals. Resistance: 7M-GE Approx. 13.8 Ω 7M-GTE 2.0 ~ 3.8 Ω If the resistance is not as specified, replace the injector. (c) Reconnect the injector connector. [DIAGRAM showing ohmmeter testing injector with illustration of ohmmeter display]