Circuit Description

WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Stability Enhancement System (VSES) is activated by EBCM calculating desired yaw rate and comparing it to actual yaw rate input. Desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. Difference between desired yaw rate and actual yaw rate is yaw rate error, which is a measurement of oversteer or understeer. If yaw rate error becomes too large, EBCM will attempt to correct vehicle's yaw motion by applying differential braking to wheels. To correct for oversteer, differential braking is used on left front or right front wheel brake. To correct for understeer, differential braking is used on left rear or right rear wheel brake.

DTC sets when yaw rate sensor signal input voltage is less than 0.23 volt or greater than 4.78 volts for more than 100 milliseconds.