Principles of Operation
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
The rear audio and temperature control (RATC) module is connected on the standard corporate protocol (SCP) communication network. The RATC module receives an input (by using several variable resistors) from the RATC switch to determine the level of rear audio volume, rear climate control temperature and fan speed.