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Home >> Buick >> 2003 >> Century Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System Testing & Engine Component Tests - 3.1L >> Fuel Systems >> Fuel Injector Circuit Diagnosis >> Circuit Description

Circuit Description

The Powertrain Control Module (PCM) enables the appropriate fuel injector on the intake stroke for each cylinder. A voltage is supplied directly 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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