Component Description For Front Bumper Radar Sensors - GF30.30-P-3302RF
Model 205
up to model year 2019
with code 22P (Lane tracking package)
Model 205
up to model year 2019
with code 23P (Driving Assistance package)
Model 253 (except 253.99)
up to model year 2020
with code 22P (Lane tracking package)
Model 253 (except 253.99)
up to model year 2020
with code 23P (Driving Assistance package)
Shown on a removed front bumper (interior view), model 205.0
Shown on a removed rear bumper (interior view), model 205.0
Location
Front:
The front bumper radar sensors are inserted into the inner side at the left and right respectively into the front bumper.
Rear:
The left rear bumper radar sensor, right rear bumper radar sensor, integrated outer left rear bumper radar sensor and the integrated outer right rear bumper radar sensor are inserted from the inside into the rear bumper on the corresponding side. The center rear bumper radar sensor is inserted centrally on the inside into the rear bumper.
Tasks
The following radar sensors (short range sensors) recognize objects (e.g. vehicles) at close range up to s = 30 m with a maximum detection angle of ∠ = 130°:
- Left front bumper radar sensor
- Right front bumper radar sensor
- Left outer rear bumper radar sensor
- Left outer rear bumper integrated radar sensor
- Right outer rear bumper radar sensor
- Right outer rear bumper integrated radar sensor
The rear center bumper radar sensor recognizes objects (vehicles in rear) up to s = 80 m (mid-range area) with a maximum detection angle of ∠ = 18°.
Structure
Front and rear bumper radar sensor (short range sensor), except center rear bumper radar sensor:
The radar sensors are ultra wideband radar sensors with the following properties:
- Detection range of the radar sensors: s = 0.18 up to 30 m with a resolution of s = 0.04 m
- Detection angle: ∠ = 80° with angle measurement and ∠ = 130° with detection only (tracing)
- Carrier frequency: f = 25 GHz
- Method of operation: Short pulse method with f = 1.4 GHz bandwidth (frequency bandwidth f = 24.25 to 25.65 GHz)
The coding (differentiation) for the individual radar sensors takes place by means of appropriate assignment with circuit 31 on pin 5 and 6.
The high band width of the radar sensors allows a very precise position statement to be made and optimizes separation of objects lying close to each other.
Center rear bumper radar sensor:
The center rear bumper radar sensor operates based on the pulse Doppler principle with the following properties:
- Detection range of the radar sensor: s = 0.18 up to 80 m with a resolution of s = 0.5 m (in close range: s = 0.18 up to 30 m with a resolution of s = 0.04 m)
- Detection angle: ∠ = 18° +8° (in the close range: ∠ = 80° with angle measurement and ∠ = 130° only detection (tracking))
- Carrier frequency: f = 25 GHz
The integrated outer right rear bumper radar sensor and the integrated outer left rear bumper radar sensor operate based on the master/slave principle. The master or slave function can be determined via the connector coding. The master function is defined for the integrated right rear bumper radar sensor. In other words, the integrated left rear bumper radar sensor sends its information via the periphery CAN to the integrated right rear bumper radar sensor which evaluates the corresponding information from both integrated rear bumper radar sensors and sends corresponding requests or data via periphery CAN to the corresponding control units.
The left front bumper radar sensor, right front bumper radar sensor, outer left rear bumper radar sensor, outer right rear bumper radar sensor and center rear bumper radar sensor are actuated and evaluated by the radar sensors control unit (N62/1). The signal transmission of the radar sensors to the radar sensors control unit is via the following CAN connections:
- Radar CAN 1 (CAN S1)
- Radar CAN 2 (CAN S2)
Radar CAN 1
The radar sensors control units communicates with the following radar sensors via radar CAN 1:
- Left front bumper radar sensor
- Right front bumper radar sensor
Radar CAN 2
The radar sensors control unit communicates with the following radar sensors via the radar CAN 2:
- Left outer rear bumper radar sensor
- Right outer rear bumper radar sensor
- Center rear bumper radar sensor
| Blind Spot Assist wiring diagram | B92/6, B92/11 | PE54.71-P-2100-97FBA | |
| Radar sensors control unit wiring diagram | B92/1, B92/3, B92/4, B92/7, B92/10 | PE30.30-P-2102-97FBA |