Circuit Test B-1: Fuel Injector Circuit Inspection

Remove air cleaner assembly. Turn ignition on. Observe fuel injector. If fuel injector does not inject fuel, go to next step. If fuel is injected without engine cranking, check for faulty fuel injector or short to ground in Yellow/Black wire between PCM and fuel injector. Repair as necessary. If fuel injector and wire are okay, replace PCM. Retest system.
Crank engine. If fuel is not injected, go to next step. If fuel is injected, check fuel injector for leaks. With ignition on, fuel injector should not leak more than one drop per minute. Repair as necessary. If no leaks are present, fuel injector and circuit are okay.
Using a mechanic's stethoscope, check fuel injector for operating sound as engine is cranked. If fuel injector made operating sound, go to CIRCUIT TEST B-2 and B-3. If injector did not make sound, turn ignition off and disconnect fuel injector harness connector. Using an ohmmeter, measure resistance between fuel injector terminals. If resistance is 0.5-1.5 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace fuel injector. Retest system.
Disconnect injector resistor connector. Using an ohmmeter, measure resistance between terminals of resistor. If resistance is 1.9-2.1 ohms at 68°F (20°C), check White/Blue wire, Yellow wire or Yellow/Black wire between PCM and main relay for an open or poor connection. Repair as necessary. If wires and connections are okay, replace PCM. If resistance is not as specified, replace fuel injector resistor. Retest system.