Circuit Description

Vehicle Stability Enhancement System (VSES) is activated by EBCM calculating desired yaw rate and comparing it to actual yaw rate input. The 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 left or right wheels.

DTC sets when VSES is engaged for 10 seconds with yaw rate error always in either understeer or oversteer (under this condition, this DTC will set by itself) or yaw rate error is greater than 10 degrees/second for 5 seconds. Steer angle must have been centered, VSES is active, direction (understeer or oversteer) of yaw rate error has not changed and lateral acceleration is less than 0.5 g.