(Component Description For Video And Radar Sensor System Control Unit - GF30.30-P-3304GR)

MODEL 166 

up to Model Year 2016 

with CODE 233 (DISTRONIC PLUS) 

with CODE 237 (Active Blind Spot Assist) 

with CODE 238 (Active lane keeping Assist) 

Shows MODEL 166.0 

Courtesy of MERCEDES-BENZ USA

Location 

The video and radar sensor system control unit is located on the A-pillar on the left.

Task 

The video and radar sensor system control unit is the evaluation unit for the short range and long range radar as well as the active lane keeping assist. This means that the video and radar sensor system control unit is responsible for the following:

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

Reading in of sensors and signals 

The input factors are received via the following connections:

• Low voltage differential signaling (LVDS) line (with code 238 (Active Lane Keeping Assist)) 
• Chassis CAN 1 (CAN E1) 
• Vehicle dynamics CAN (CAN H) 
• Sensor CAN (CAN S) 

Low voltage differential signaling line (with 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 1 

The video and radar sensor system control unit receives the following information about chassis CAN 1:

• 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 turn signal indicator (with code 233 (DISTRONIC PLUS) or code 237 (Active Blind Spot Assist))
• Status of the trailer (with code 237 (Active Blind Spot Assist) and code 550 (Trailer hitch))
• Track 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 signals from the following component are received via the vehicle dynamics CAN:

• DISTRONIC electric controller unit (A89) (with CODE 233 (DISTRONIC PLUS) or 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 received via the sensor CAN:

• With CODE 233 (DISTRONIC PLUS) or with CODE 237 (Active Blind Spot Assist):
  • Left front bumper DISTRONIC (DTR) sensor (B29/2)
  • Right front bumper DISTRONIC (DTR) sensor (B29/3)
• With 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) (except code 494 (USA version))
• Permanent Speed Limiter (winter tires)
• DISTRONIC PLUS (with 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 1 
• Vehicle dynamics CAN 
• Sensor CAN 

Chassis CAN 1 

With code 233 (DISTRONIC PLUS) the video and radar sensor system control unit transmits the following signal via chassis CAN 1:

• 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 transmits the following signals via chassis CAN 1:

• Request to activate the left blind spot assist ready and warning display (M21/1e2) or right blind spot assist ready and warning display (M212/e2).
• Request to issue acoustic warnings
• Request to issue system or warning messages

With code 238 (Active Lane Keeping Assist) the video and radar sensor system control unit transmits the following signals via 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 

With code 233 (DISTRONIC PLUS) or with code 237 (Active Blind Spot Assist) the video and radar sensor system control unit transmits the following signals as examples via the vehicle dynamics CAN:

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

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:

• 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-2103-97NAA