COLLISION PREVENTION ASSIST controller unit, component description - GF30.30-P-3214CAM
MODEL 207.3/4 as of model year 2014 up to model year 2015 with CODE 258 (Collision Prevention Assist)
MODEL 207.3/4 as of model year 2015 with CODE 258 (COLLISION PREVENTION ASSIST PLUS)
Location
The COLLISION PREVENTION ASSIST controller unit is located in the direction of travel at the rear right to the front bumper.
Task
The COLLISION PREVENTION ASSIST controller unit detects obstacles and vehicles moving immediately ahead and warns the driver about a possible collision.
If the COLLISION PREVENTION ASSIST controller unit detects a risk of a collision, it initiates automatic brake application.
This means that the COLLISION PREVENTION ASSIST controller unit has the following individual tasks:
- Reading in input factors
- Evaluation of input factors
- Transmission of initial parameters
Reading in input factors
The COLLISION PREVENTION ASSIST controller unit receives the following input factors, among other things, via chassis CAN 1 (CAN E1):
- Wheel speeds and wheel rotation direction
- Steering angle
- 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).
Evaluation of input factors
The input factors are evaluated by the microprocessor and the corresponding components are actuated.
Transmission of initial parameters
The COLLISION PREVENTION ASSIST controller unit also transmits the following initial parameters via chassis CAN 1:
- Requests to output optical and acoustic warning messages in instrument cluster
- Requirements for initiating PRE-SAFE® measures
- Request to initiate a brake application
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Body
The COLLISION PREVENTION ASSIST controller unit includes the following components:
- Radar sensor
- Control unit
Properties of the radar sensor:
- Detection range of the radar sensor s = 0 to 80 m for a detection angle of = 18° +/-8°
- 25 GHz radar sensor operating on the pulse Doppler principle for independent measurement of distance and speed
The COLLISION PREVENTION ASSIST controller unit must be newly adjusted after exchange (e.g. after an accident repair) using the integrated "service adjustment mode".
| Wiring diagram for collision warning system control unit | PE30.30-P-2104-97EAA |