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Home >> Pontiac >> 2003 >> Sunfire Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Tests - 2.2L >> Fuel Systems (Gasoline) >> Fuel Injector Circuit Diagnosis >> Circuit Description

Circuit Description

The Powertrain Control Module (PCM) enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The PCM controls each fuel injector by grounding the control circuit via a solid state device called a driver.

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