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

Model All (4xWD) 

Model All (CAR) 

Overview 

This document contains information on: 

• General 
• Function 
  • Radar sensor 
  • Controller unit 

General 

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 Assistant controller unit contains the following assembly parts:

• Radar sensor
• Control unit

Function 

Radar sensor 

The radar sensor has the following properties:

• Detection range:
  • 40 m at a detection angle of 45°
  • 160 m at a detection angle of 7.5°
• Detection range (from FAP5/introduction of model series 223):
  • 70 m for 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.

Controller unit 

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
• Request to reduce engine torque

The Active Brake Assist controller unit is readjusted after replacement (e.g. after an accident repair) via the integrated "Service adjustment mode".

	Detailed information
	Collision warning system controller unit, detailed	Model 118, 177, 247	GF30.30-P-9893-01A
		Model 167, 293	GF30.30-P-9893-01B
	Component descriptions
	Active Brake Assist controller unit, component description	Model 243	GF30.30-P-3222B
		Model 118, 177, 247 as of model year 2023	GF30.30-P-3222L
		Model 167 as of model year 2023	GF30.30-P-3222M
	Collision warning system radar sensor, component description	Model 223	GF30.30-P-3311A
		Model 206	GF30.30-P-3311C
		Model 297	GF30.30-P-3311D
		Model 295	GF30.30-P-3311E
		Model 232	GF30.30-P-3311F
		Model 296	GF30.30-P-3311G
		Model 254	GF30.30-P-3311H
		Model 294	GF30.30-P-3311N
		Model 192	GF30.30-P-3311R
		Model 236	GF30.30-P-3311S
		Model 465	GF30.30-P-3311T