Where is the computer brain on a Dodge Caravan van?

Dodge Caravans, like other modern vehicles, don't have a single "brain" in the way a computer does. Instead, they use a network of electronic control units (ECUs), also called modules. These ECUs control various systems. There's no one central location, but many are found under the dashboard, in the engine compartment, and sometimes even in the passenger compartment. The main ECU, often called the Powertrain Control Module (PCM) or Engine Control Module (ECM), is typically located in the engine compartment.