Signal Function
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The anti-lock brake system (ABS) module provides the vehicle speed signal to the powertrain control module (PCM). The vehicle speed signal is used by the PCM to calculate speed control and power take-off control strategies.