Collision Warning System Controller Unit, Basic Function - GF30.30-S-9893A

Model All (Light transporter) 

Overview 

This document contains information on:

• General 
• Function 

General 

The Active Brake Assistant controller unit contains the following assembly parts:

• Radar sensor
• Control unit

Properties of the radar sensor:

• Detection range:
  • 40 m for a detection angle of 45°
  • 160 m at a detection angle of 7.5°
• Detection range:
  • 70 m at a detection angle of 45°
  • 250 m at a detection angle of 9°
• Operating frequency: 77 GHz

The radar sensor works according to the Pulse-Doppler principle for the independent measurement of distance and speed.

The Active Brake Assist controller unit must be readjusted after replacement (e.g. after accident repair).

Function 

The Active Brake Assist controller unit detects obstacles in front of the vehicle and warns the driver about possible collisions. The Active Brake Assist controller unit differentiates, in this connection, between vehicles in front, crossing traffic and bike riders. If the Active Brake Assist controller unit detects a collision risk, it initiates an autonomous brake application.

The Active Brake Assist controller unit is connected to the network architecture of the vehicle.

For the implementation of the functions, the Active Brake Assist controller unit processes among other things the following information:

• Terminal status of terminal 15
• Operating condition for engine/drivetrain
• Wheel speed and wheel rotation direction
• Acceleration/yaw rate
• Electronic Stability Program (ESP®) status
• Steering wheel angle and steering wheel velocity
• Accelerator pedal position
• Brake pedal position
• Driver's requests via menu settings

Depending on the national version, the Active Brake Assist controller unit also processes object information of the multifunction camera behind the windshield.

The Active Brake Assist controller unit processes this information and transmits among other things the following requests:

• Warning output requests
• Requirements for initiating PRE-SAFE® measures
• Increase braking torque request.
• Reduce engine torque request.

	Detailed information
	Collision warning system controller unit, detailed information	Model 420 with code BA3 (Active Brake Assist System)	GF30.30-S-9893-01A
		Model 447 with code BA3 (Active Brake Assist System) with code XM7 (MOPF II)	GF30.30-S-9893-01B
	Component descriptions
	Active Brake Assist controller unit, component description	Model 420 with code BA3 (Active Brake Assist System)	GF30.30-S-3222VRA
		Model 447 with code BA3 (Active Brake Assist System) with code XM7 (MOPF II)	GF30.30-S-3222A