Vehicle Speed
WARNING: This page is about a different car, the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, and 2007 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle speed sensor signal is converted into mph or km/h for display. The vehicle speed output from the ECM is 4,000 ppm. The scan tool uses the class 2 serial data from the ECM to obtain vehicle speed, while the Instrument Panel Cluster (IPC), cruise control module and the chime alarm module use the 4,000 ppm output.