Theory Of Operation
WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The PCM receives:
Wheel speed and wheel distance CAN bus messages from the Anti-lock Brake module.
A/C Pressure, Ambient Air Temperature and Fuel Level CAN bus messages from the TIPM.