Distance Control Controller Unit, Basic Function - GF30.30-D-9891A

Model All (Light transporter) 

With Code ET4 (Active Distance Assist DISTRONIC) 

Overview 

This document contains information on:

• General 
• Function 

General 

The multi-range radar in the Active Distance Assist DISTRONIC electric controller unit detects the traffic situation in front of the vehicle.

Function 

The Active Distance Assist DISTRONIC electric controller unit processes the data of the multi-range radar for the implementation of the following functions:

• Distance control
• Collision warning
• Autonomous partial braking and maximum full-stop braking

The Active Distance Assist DISTRONIC electric controller unit is connected to the network architecture of the vehicle.

For the execution of the functions, the Active Distance Assist DISTRONIC electric controller unit processes the following information:

• Operating condition for engine/drivetrain
• Driving stage engaged
• Active transmission mode
• Parking brake status
• Vehicle speed
• Operating requests
• Brake system status
• Accelerator pedal position
• Engine drive torque
• Steering wheel angle

The Active Distance Assist DISTRONIC electric controller unit evaluates these input factors and transmits the following information and requests:

• System status
• Object information
• Requests:
  • Increase/reduce engine torque.
  • Expand/limit drive range.
  • Increase/reduce braking torque.
  • Brakes
  • Show system and/or warning messages, output warning tones.
  • Status queries, diagnosis

The Active Distance Assist DISTRONIC electric controller unit contains the following component parts:

• Multi-range radar
• Controller unit

The multi-range radar has the following detection range:

• 40 m for a detection angle of 45°
• 160 m at a detection angle of 7.5°

The multi-range radar works according to the Pulse-Doppler principle for the independent measurement of the distance and speed. The operating frequency is 77 GHz

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

	Component descriptions
	Active Distance Assist DISTRONIC controller unit, component description	Model 907, 910 with code ET4 (Active Distance Assist DISTRONIC) with code XJ4 (Modification year G4-I)	GF30.30-D-3223A