Component Description For Radar Sensors Control Unit - GF30.30-P-3301GN

MODEL 166 

as of Model Year 2016 

with CODE 23P (Driving Assistance package Plus) 

MODEL 292 

with CODE 23P (Driving Assistance package Plus) 

Shown on MODEL 292 

Location 

The radar sensors control unit is located under the left front fender.

Tasks 

The radar sensors control unit is the evaluation and arithmetic unit of the short and long range radar as well as the object and lane data of the stereo multifunction camera (A40/13) (for code 23P (Driving assistance package)). This in turn means that the radar sensors control unit is responsible for the following tasks:

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

Reading in of signals 

The input factors are received via the following connections:

• Suspension FlexRay (Flex E) 
• Radar CAN 1 (CAN S1) 
• Radar CAN 2 (CAN S2) 

Chassis FlexRay 

The radar sensors control unit receives the following information via the chassis FlexRay:

• Wheel speed and wheel rotation direction
• Acceleration/yaw rate
• Steering wheel angle
• Accelerator pedal position
• Brake pedal position
• Position of combination switch (S4)
• Driver request via menu settings in the instrument cluster (A1)

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

Radar CAN 1 

The signals for the following components are received via the radar CAN 1:

• Left front bumper radar sensor (B92/3)
• Right front bumper radar sensor (B92/4)

Radar CAN 2 

The signals for the following components are received over the radar CAN 2:

• Center rear bumper radar sensor (B92/1)
• Outer right rear bumper radar sensor (B92/7)
• Outer left rear bumper radar sensor (B92/10)

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 radar sensors control unit actuates the following functions to match the particular equipment involved:

• DISTRONIC PLUS (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• DISTRONIC PLUS with Steer Assist (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• BAS PLUS (for code 268 (BAS PLUS))
• BAS PLUS with Cross Traffic Assist with CODE 269 (BRAKE ASSIST PLUS CROSSING TRAFFIC))
• PRE-SAFE® brake (with CODE 300 (Collision reduction (CMS)))
• Pedestrian protection emergency braking function (with CODE 271 (Autonomous intervention by the brake system/pedestrian protection))
• Rear end PRE-SAFE (with CODE 253 (Rear-end collision warning and protection system))
• 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 FlexRay 
• Radar CAN 1 and radar CAN 2 

Chassis FlexRay 

The radar sensors control unit transmits the following signals via the chassis FlexRay:

• Requests to output optical and acoustic warning messages in instrument cluster
• Requests to initiate PRE-SAFE measures (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Requests for wheel-specific brake interventions (with CODE 237 (Active Blind Spot Assist))
• Request for activating the left Blind Spot Assist readiness and warning indicator (M21/1e2) or the right Blind Spot Assist readiness and warning indicator (M21/2e2) (with CODE 237 (Active Blind Spot Assist))
• Radar requirements of the long range radar (vehicle/operation-specific data
• Request to increase the braking torque (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Request to reduce the braking torque (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Wheel-specific interventions by the brake system (with CODE 237 (Active Blind Spot Assist) or with CODE 238 (Active Lane Keeping Assist))
• Request for gear range limitation (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Request for gear range increase (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Request for gear range reduction (CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
• Diagnosis request

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

Radar CAN 1 and radar CAN 2 

The radar sensors control unit sends the following signals amongst others via radar CAN 1 and radar CAN 2:

• 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).