Circuit Description

The Vehicle Stability Enhancement System (VSES) is activated when the EBCM determines that the desired yaw rate does not match the actual yaw rate. The desired yaw rate is calculated from the measured steering wheel position, vehicle speed, and lateral acceleration.

The usable output voltage range is 0.15-4.85 volts for the following sensors:

• The yaw rate sensor.
• The longitudinal accelerometer.

The usable output voltage range is 0.4-4.6 volts for the lateral accelerometer.

With no sensor bias present, a 2.5 volt signal from these sensors is interpreted by the EBCM respectively as follows:

• Zero yaw rate.
• Zero lateral acceleration.
• Zero longitudinal acceleration.

The sensor bias compensates, during VSES initialization, for sensor mounting alignment errors, electronic signal errors, temperature changes, and manufacturing differences.