nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Fuel Injector|Testing and Inspection > < Fuel - Injector Replacement Guidelines|Page 2644
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Fuel Injector: Description and Operation

Fuel Injector

The fuel injectors are small solenoids mounted on the fuel rail. They allow fuel to be injected into the intake manifold. The injectors receive the ground
circuit from the ECU in terms of "Injection Duration". The voltage applied to the electrical windings pulls the needle valve up allowing fuel to flow
through the nozzle.

WARNING: The positive circuit is always "Hot" at the injector terminals when the battery is connected.

Fuel Injector|Testing and Inspection > < Fuel - Injector Replacement Guidelines|Page 2644