Intelligent Radar Sensor Control Unit, Component Description - GF30.30-P-3305RR
Model 190
with CODE 22P (Lane tracking package)
Location
The integral rear bumper radar sensors are inserted into the respective side from inside in the left rear bumper.
Task
The integral rear bumper radar sensors (short range sensor) recognize objects (e.g. vehicles) in the near vicinity.
The integral rear bumper radar sensors are ultra wideband radar sensor with the following properties:
- Detection range: 0.18 to 30 m for a resolution s = 0.04 m
- Detection angle = 60° with angle determination and α = 130° only detection (track)
- Carrier frequency: f = 25 GHz
- Method of operation: Short pulse method with f = 1.4 GHz band width
The integral rear bumper radar sensors operate according to 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. This means that the integral left rear bumper radar sensor transmits its data and requests via chassis CAN 1 (CAN E1) to the integral right rear bumper radar sensor. The integral right rear bumper radar sensor evaluates the data from both integral rear bumper radar sensors and transmits appropriate requests or data via chassis CAN 1 to the respective control units.
To do this the integral rear bumper radar sensors fulfil the following tasks:
- Reading in of sensors and signals
- Evaluation of input factors
- Output of signals
Reading in of sensors and signals
The integral rear bumper radar sensors receive the following signals, amongst others, via chassis CAN 1:
- Terminal status of terminal 15
- "Blind Spot Assist" status
- Engine running or drivetrain operational
- Wheel speeds and wheel rotation direction
- Vehicle speed
- Switch position of combination switch (S4)
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 output takes place of respective signals.
Output of signals
The integral left rear bumper radar sensor transmits the following signals via the chassis CAN 1:
- Requests to output optical and acoustic warning messages in instrument cluster
The integral right rear bumper radar sensor transmits the following signals via the chassis CAN 1:
- Requests to output optical and acoustic warning messages in instrument cluster
- Request for the left Blind Spot Assist warning lamp (M21/1e2) and the right Blind Spot Assist warning lamp (M21/2e2)
The integral left rear bumper radar sensor sends detection data via chassis CAN 1 to the integral right rear bumper radar sensor, which uses it to generate the requests to output a warning.
| Blind Spot Assist wiring diagram | PE54.71-P-2100-97HBA DOC NOT FOUND ON MB SITE. REFERENCE GREYED OUT ON MB SITE |