Vehicle speed signal, checking: Notes
WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle speed is required for A/C compressor cut-off during acceleration, for the cruise control system and to improve driving comfort (shift-jerk).