Monitor Description
WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The ECM assumes that the vehicle is driven when the park/neutral position switch is OFF and it has been over 4 second since the actual vehicle speed was 9 km/h (6 mph) or more.
If there is no signal from the vehicle speed sensor when these conditions are satisfied, the ECM concludes that there is a fault in the vehicle speed sensor. The ECM will turn on the MIL and a DTC is set.