Component description for radar sensors control unit - GF30.30-P-3301FL
MODEL 212.0/2 up to 31.5.10 with CODE (233) Distronic Plus with CODE (234) Blind Spot Assist
Location
The radar sensors control unit is located at the front in the right footwell on left-hand drive vehicles and on the A-pillar at the bottom right on right-hand drive vehicles.
Task
The radar sensors control unit is the evaluation unit for the short range radar and also, for code (233) DISTRONIC PLUS, for the long range radar. To do this the radar sensors control unit fulfills the following tasks:
- Reading in of sensors, pickups and signals
- Evaluation of input factors
- Control of systems
- Output of signals
Reading in of sensors, pickups and signals
The input factors are read in via the following connections:
- Chassis CAN (CAN E)
- Vehicle dynamics CAN (CAN H)
- Sensor CAN (CAN S)
Chassis CAN
As an example, the radar sensors control unit reads in the following information via the chassis CAN:
- Status of the accelerator pedal
- Drive position status
- Service brake, status
- Yaw rate status
- Wheel speeds and wheel rotation direction
- Status information from the driver assist or driving safety system
- Parking brake status
- Status of steering angle
- Position data from navigation (for the Western Europe version)
- Driver request via the cruise control lever (S40/4)
- Driver request via menu settings in instrument cluster (A1)
- Status of the flasher (for code (234) Blind Spot Assist)
- Status of the trailer (for code (234) Blind Spot Assist and code (550) AHV)
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Vehicle dynamics CAN
The signals from the following components are read in via the vehicle dynamics CAN:
- DISTRONIC electric controller unit (A89) (with code (233) DISTRONIC PLUS)
Long range radar data
Diagnostic data from the long range radar
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Sensor CAN
The signals of the following components are read in via the sensor CAN:
- For code (233) DISTRONIC PLUS
Radar sensor on the inside left, front bumper (A86/1b2)
Radar sensor on the inside right, front bumper (A86/1b3)
- For code (234) Blind Spot Assist
- Radar sensor on the outside right, rear bumper (A86/2b1)
- Radar sensor on the outside left, rear bumper (A86/2b4)
The functions resulting therefrom are described in the corresponding 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.
Due to the high performance of the radar sensors control unit, it is equipped with two microprocessors (clock frequency 40 MHz each).
Control of systems
- Variable Speed Limiter function (Speedtronic) (except code (494) USA version)
- Permanent Speed Limiter (winter tires)
- DISTRONIC PLUS (for code (233) DISTRONIC PLUS)
- Automatic deactivation of the radar sensor system (for the Western European version)
- Blind Spot Assist (for code (234) Blind Spot Assist)
Output of signals
The signals are issued over the following connections:
- Chassis CAN
- Vehicle dynamics CAN
- Sensor CAN
Chassis CAN
For code (233) DISTRONIC PLUS the radar sensors control unit evaluates all input data and then takes on complete control of the vehicle's longitudinal movements, by sending signals for acceleration, deceleration and gear switching via the chassis CAN. Warning tones and display in the IC are also actuated by the radar sensors control unit and the PRE-SAFE measures are requested via the chassis CAN.
For code (234) Blind Spot Assist the radar sensors control unit actuates the left Blind Spot Assist readiness and warning indicator (M21/1e2) and the right Blind Spot Assist readiness and warning indicator (M21/2e2).
The radar sensors control unit warning tones and indication are also requested in the IC.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Vehicle dynamics CAN
As an example, for code (233) DISTRONIC PLUS the radar sensors control unit transmits the following signal via the vehicle dynamics CAN:
- Radar requirements of the long range radar (vehicle / operation-specific data)
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Sensor CAN
The radar sensors control unit transmits the following signals via the sensor CAN:
- Radar requirements of the short range radar (vehicle / operation-specific data)
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
| Radar sensors control unit wiring diagram | PE30.30-P-2102-97DAA |