Component Description For Video And Radar Sensor System Control Unit - 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) 

Shows MODEL 218.3 

Location 

The video and radar sensor system control unit is fastened to the front in the front passenger footwell under the floor covering on the front passenger footrest.

Tasks 

The video and radar sensor system control unit is unit that evaluates the short and the long range radar.

The video and radar sensor system control unit has the following tasks:

• Reading in sensors and signals 
• Evaluation of input factors 
• Controlling functions 
• Output of signals 

Reading in sensors 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) (up to 28.02.2013) or chassis CAN 1 (CAN E1) (as of 01.03.2013) 
• 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 (up to 28.02.2013) or chassis CAN 1 (as of 01.03.2013) 

As an example the video and radar sensor system control unit reads in the following information via the chassis CAN or chassis CAN 1:

• Operating condition for engine/drivetrain
• Gear range engaged
• Parking brake status
• Engine drive torque
• Braking torque
• Acceleration/yaw rate
• Driver request via the cruise control lever
• Driver request to overtake (setting the turn signal)
• Driver request via menu settings in the IC
• Vehicle speed/acceleration
• Global Positioning System (GPS) signals
• Steering wheel angle
• Object recognition short range (short range radar)
• Object recognition long range (long range radar)
• Accelerator pedal position
• Brake pedal position
• Lane data (with 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 video and radar sensor system control unit reads in the following signals from the DISTRONIC electric controller unit (A89) (for code 233 (DISTRONIC PLUS) or code 237 (Active Blind Spot Assist)) via the dynamics CAN:

• 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 video and radar sensor system control unit reads in signals from the following assembly parts via the sensor-CAN:

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

• Right rear bumper radar sensor (B29/7) (for code 237 (Active Blind Spot Assist))

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 assembly parts are then actuated.

Controlling functions 

The video and radar sensor system control unit controls the following functions:

• Variable Speed Limiter function (Speedtronic) (without code 494 (USA version))
• Permanent Speed Limiter (e.g. for winter tire operation)
• DISTRONIC PLUS (with CODE 233 (DISTRONIC PLUS))
• Automatic switch on and off of the short range radar sensor system (vehicles up to 28.02.2013 with a Western Europe design)
• 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 (up to 28.02.2013) or chassis CAN 1 (as of 01.03.2013) 
• Vehicle dynamics CAN 
• Sensor CAN 

Chassis CAN (up to 28.02.2013) or chassis CAN 1 (as of 01.03.2013) 

The video and radar sensor system control unit transmits the following signals via the chassis CAN or chassis CAN 1:

• Request "Engage the targeted gear" (downshift or upshift)
• Request to increase/reduce engine torque
• Request: switch short range radar system on/off
• Request to increase/reduce braking torque
• Request to emit warning tones, system or warning messages

For vehicles with code 237 (Active Blind Spot Assist) the video and radar sensor system control unit transmits the following signals via the chassis CAN or chassis CAN 1:

• Request for actuation of the left Blind Spot Assist warning lamp (M21/1e2) or the right Blind Spot Assist warning lamp (M21/2e2)
• Request to issue acoustic warnings
• Request to issue system or warning messages

For vehicles with code 238 (Active Blind Spot Assist) the video and radar sensor system control unit transmits the following example signals via the chassis CAN or chassis CAN 1:

• 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 

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

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

For vehicles with 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:

• Request for wheel selective interventions 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-2103-97XAA