Component description for video and radar sensor system control unit - GF30.30-P-3304CA

MODEL 207 as of model year 2012 up to model year 2014 with CODE 233 (DISTRONIC PLUS) 

MODEL 207 as of model year 2012 up to model year 2014 with CODE 237 (Active Blind Spot Assist) 

MODEL 207 as of model year 2012 up to model year 2014 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 
• Controlling functions 
• 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 the 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
• Gear range 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
• Braking torque
• Drive torque
• Tire pressure
• Parking brake status
• Status of steering angle
• Position data from navigation (for the Western Europe version)
• Driver request through 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)
• Status of the trailer (for code (237) Active Blind Spot Assist and code (550) Trailer hitch)
• 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) (for code (233) DISTRONIC PLUS or with code (237) Active Blind Spot Assist)
• Long range radar radar data
• Diagnostic data from long range radar

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 depending on the equipment present:

• Variable Speed Limiter function (Speedtronic) (without code (494) USA version)
• Permanent Speed Limiter (e.g. operation with winter tires)
• DISTRONIC PLUS (for code (233) DISTRONIC PLUS)
• Automatic deactivation 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:

• Request to increase engine torque
• Request to reduce engine torque
• Request to limit stages
• Request to increase a stage
• Request to reduce a stage
• Request to issue acoustic warnings
• Request to issue system or warning messages
• 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:

• Request to activate left Blind Spot Assist readiness and warning indicator (M21/1e2) and right Blind Spot Assist readiness and warning indicator (M21/2e2)
• Request to issue acoustic warnings
• Request to issue system or warning messages

For code (238) Active lane keeping assist, the video and radar sensor system control unit sends the following example signals via the chassis CAN:

• Request to issue acoustic warnings
• Request to issue system or warning messages

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

Vehicle dynamics CAN 

With code (233) DISTRONIC PLUS, the video and radar sensor system control unit transmits the following signal 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 intervention by the brake system

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-2103-97EAA