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Home >> Pontiac >> 2007 >> Grand Prix Base >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Starter >> Battery, Charging System And Starting System >> Description and Operation >> Charging System Description and Operation >> Charging System Components >> Engine Control Module (ECM) / Powertrain Control Module (PCM)

Engine Control Module (ECM) / Powertrain Control Module (PCM)

The ECM/PCM directly controls the generator field control circuit input to the generator. It monitors the generators generator field duty cycle signal circuit and sends the information to the BCM. The ECM/PCM will over ride the BCM control of the generator when one of the following conditions are met:

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