Video and radar sensor system control unit, component description - GF30.30-P-3304FQ

MODEL 218 with CODE (233) Distronic Plus with CODE (237) Active Blind Spot Assist with CODE (238) Active Lane Keeping Assist 

Front passenger footwell, partially disassembled 

Location 

The video and radar sensor system control unit is located at the front right in the front passenger footwell under a cover.

Task 

The video and radar sensor system control unit is unit that evaluates the short and the long range radar. To do this the video and radar sensor system control unit performs the following tasks:

• Reading in of sensors, pickups and signals 
• Evaluation of input factors 
• Control of systems 
• Output of signals 

Reading in of sensors, pickups and signals 

The input factors are read in via the following connections:

• Low voltage differential signal (LVDS) line (for code (238) Active Lane Keeping Assist) 
• Chassis CAN (CAN E) 
• Vehicle dynamics CAN (CAN H) 
• Sensor CAN (CAN S) 

Low voltage differential signaling line (for code (238) Active Lane Keeping Assist) 

The video and radar sensor system control unit receives image data from the multifunction camera (A40/11) via an LVDS line.

Chassis CAN 

As an example the video and radar sensor system control unit reads in the following information via the chassis CAN:

• Status of the accelerator pedal
• Drive position status
• Stage status
• Service brake, status
• Yaw rate status
• Status information from the driver assist or driving safety system
• Wheel speeds and wheel rotation direction
• Brake torque
• Drive torque
• Tire pressure
• Parking brake status
• Status of steering angle
• Position data for navigation
• Driver request via the cruise control lever (S40/4)
• Driver request via menu settings in the instrument cluster (A1)
• Status of the flasher (for code (237) Active Blind Spot Assist)
• Lane data (for code (238) Active Lane Keeping Assist)

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Vehicle dynamics CAN 

The signals from the following components are read in via the vehicle dynamics CAN:

• DISTRONIC electric controller unit (A89) (with code (233) DISTRONIC PLUS or with code (237) Active Blind Spot Assist)
  • Long range radar data
  • Long range radar diagnosis data

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Sensor CAN 

The signals of the following components are read in via the sensor CAN:

• With code (233) DISTRONIC PLUS or code (237) Active Blind Spot Assist
  • Left front bumper DISTRONIC (DTR) sensor (B29/2)
  • Right front bumper DISTRONIC (DTR) sensor (B29/3)
• For code (237) Active Blind Spot Assist
  • Left rear bumper radar sensor (B29/6)
  • Right rear bumper radar sensor (B29/7)

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors 

The input factors are evaluated by the integrated microprocessors and the relevant components are then actuated.

Controlling functions 

The video and radar sensor system control unit controls the following systems dependent on the equipment present:

• Variable Speed Limiter function (Speedtronic) (without code (494) USA version)
• Permanent Speed Limiter (winter tires)
• DISTRONIC PLUS (for code (233) DISTRONIC PLUS)
• Automatic on and off switching of the radar sensor system (for the Western European version)
• Active Blind Spot Assist (with code (237) Active Blind Spot Assist)
• Active Lane Keeping Assist (with code (238) Active Lane Keeping Assist)

Output of signals 

The signals are issued over the following connections:

• Chassis CAN 
• Vehicle dynamics CAN 
• Sensor CAN 

Chassis CAN 

With code (233) DISTRONIC PLUS, the video and radar sensor system control unit transmits the following signal via the chassis

CAN: 

• Increase engine torque
• Reduce engine torque
• Driving stages limitation
• Increasing the gear range
• Reducing the gear range
• Warning tone output
• System and warning signal output
• Request for PRE-SAFE measures
• Braking requests

With code (237) Active blind spot assist, the video and radar sensor system control unit sends the following signals via the chassis CAN:

• Activation of left blind spot assist ready and warning display (M21/1e2) or right blind spot assist ready and warning display (M21/2e2)
• Warning tone output
• System and warning signal output

For code (238) Active Lane Keeping Assist the video and radar sensor system control unit transmits the following example signals via the chassis CAN:

• Warning tone output
• System and warning signal output

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Vehicle dynamics CAN 

For code (233) DISTRONIC PLUS the video and radar sensor system control unit transmits the following signals via the vehicle dynamics CAN:

• Radar requirements of the long range radar (vehicle/operation-specific data
• Diagnosis request

For code (237) Active Blind Spot Assist or code (238) Active Lane Keeping Assist the video and radar sensor system control unit transmits the following signals via the dynamics CAN:

• Wheel selective brake system intervention

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Sensor CAN 

The video and radar sensor system control unit transmits the following signals via the sensor CAN:

• Radar requirements of the short range radar (vehicle/operation-specific data)
• Diagnosis request

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Wiring diagram for the video and radar sensor system control unit

PE30.30-P-2103-97XAA