Bosch DSC 3.X User Manual download pdf (Page 16)

Introduction to DSC

Lateral Acceleration Sensor (Bosch 5.3)

This new sensor is a major contributor of the expanded

capabilities of DSC III.

It is located under the drivers seat but mounted on the ver-

tical surface of the inner rocker sill. (approximately 2” in

front of the B pillar).

The drivers seat and door jamb trim must be removed and

the floor coverings pulled out of the way to access the lat-

eral acceleration sensor.

Sensor Operation

The lateral acceleration sensor is connected to the DSC III

control module by a 3 pin plug. The sensor receives oper-

ating power and ground. It return, it provides a linear volt-

age signal which is a measurement of “side to side” G-force acceleration.

• The voltage range is from 0.5 to 4.5 volts which corresponds to a G force range of

-1.5 to +3.5 g.

• With the vehicle stationary on a level surface, approximately 1.7 volts is present on

the signal line. This is indicative of the nominal value of 0.0g.

The sensor is a capacitive type sensor. Under the effects of lateral acceleration, a moving

capacitor plate moves in relation to a fixed capacitor plate. The result is a signal propor-

tional to the effect of lateral acceleration.

The signal provides additional information which enables the DSC III logic a higher level of

sensing the vehicles handling characteristics.

The DSC regulation is calculated from:

• The steering input from the desired vehicle direction from the driver

• The Rotation Rate sensor to determine the “yaw” of the vehicle

• The left and right front wheel speed to verify the turning rate in the corner

These inputs allow the DSC logic to calculate the under/over steer while cornering, and the

rate of the vehicle speed entering the corner. For this calculation, the DSC can then com-

pensate by reducing engine torque, and applying the appropriate braking to stabilize the

vehicle for safer handling.

1- Floor Covering 2 - 3 Pin Plug

2 - Mounting Screws

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Bosch DSC 3.X User Manual Page 16