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Miscellaneous Controls: Generator

WARNING: This page is about a different car, the 2003 Dodge Grand Caravan, 2003 Dodge Caravan, 2003 Chrysler Voyager, and 2003 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) uses various input signals and an internal electronic voltage regulator to maintain charging system voltage at 12.9-15.0 volts. Internal electronic voltage regulator controls charging system voltage by cycling the ground circuit on the generator field. Battery voltage is supplied to generator through a fusible link and the Auto Shutdown (ASD) relay. For operation of ASD relay, see AUTO SHUTDOWN RELAY  . If a failure exists in the charging system, a diagnostic trouble code will be stored in the PCM. For additional charging system information, see GENERATORS & REGULATORS - CARAVAN, TOWN & COUNTRY, & VOYAGER article in ELECTRICAL.

The generator is belt-driven by the engine. The generator produces DC voltage at the B+ terminal. If the generator is failed, the generator assembly sub-components (generator and decoupler pulley) must be inspected for individual failure and replaced accordingly. As the energized rotor begins to rotate within the generator, the spinning magnetic field induces a current into the windings of the stator coil. Once the generator begins producing sufficient current, it also provides the current needed to energize the rotor. The Y-type stator winding connections deliver the induced AC current to 3 positive and 3 negative diodes for rectification. From the diodes, rectified DC current is delivered to the vehicles electrical system through the generator, battery, and ground terminals. Excessive or abnormal noise emitting from the generator may be caused by:

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