Trip A/B And Odometer Displays
WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle speed signal (VSS) from all 4 wheels is hardwired directly to the ABS module. The speed status is then sent to the instrument cluster by the ABS module over the SCP communication network to establish a rolling count.