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EC-496 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] FUEL INJECTOR FUEL INJECTOR Description INFOID:0000000010095213 The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the fuel injector circuit, the coil in the fuel injec- tor is energized. The energized coil pulls the ball valve back and allows fuel to flow via the fuel injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the fuel injector remains open. The ECM controls the injection pulse duration based on engine fuel needs. Component Function Check INFOID:0000000010095214 1. INSPECTION START Turn ignition switch to START. YES >> GO TO 2. NO >> Go to 2. CHECK FUEL INJECTOR FUNCTION With CONSULT 1. Start engine. 2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT. 3. Check that each circuit produces a momentary engine speed drop. Without CONSULT 1. Start engine. 2. Listen to each fuel injector operating sound. Is the inspection result normal? YES >> INSPECTION END NO >> Go to Diagnosis Procedure INFOID:0000000010095215 Regarding Wiring Diagram information, refer to . 1. CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect fuel injector harness connector. 3. Turn ignition switch ON. PBIA9664J Clicking sound should be heard. PBIB3332E |