Principles of Operation: Notes
WARNING: This page is about a different car, the 2003 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The front electronic module (FEM), rear electronic module (REM), and the remote keyless entry (RKE) driver door module (DDM), RKE (DDM) must all be reconfigured before installing a new module. REFER to MODULE CONFIGURATION
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The vehicle's electronic functions are divided into zones. The FEM controls the front portion of the vehicle and the REM controls the rear portion of the vehicle. These systems rely heavily on the standard corporate protocol (SCP) communication network in order to transmit and receive signals. As a technician it is very important to understand:
- where the input (command) originates from
- all information (messages) necessary in order for a feature to operate
- which module(s) receive(s) the input or command message
- does the module which received the input (message) control the output of the feature, or does it output a message over the SCP communication network to another module
- which module controls the output of the feature