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Intelligent Driving Radar Sensor, Basic Function - GF54.71-P-2005A
Model All (4xWD)
Model All (CAR)
Overview
This document contains information on:
- General information
- Function
General information
Radar sensors detect objects within their detection range. A high resolution enables several different objects to be detected, and their position and direction of movement to be determined. This allows the system to determine which objects represent an obstacle for the vehicle's movement.
The short-rage and long-range radar sensor (1) or the midrange radar is located in the front center, in front of the cooler.
The outer front radar sensors are located on the left and right behind the front bumper. The outer rear radar sensors are located on the left and right behind the rear bumper.
Function
The radar sensor transmits bundled electromagnetic waves as so-called primary signals. Objects in the detection range of the radar sensor reflect these electromagnetic waves. The radar sensor receives the reflected electromagnetic waves (secondary signals) and evaluates them according to various criteria. In this way, different information can be obtained about the objects:
- Angle or direction to the object
- Distance to the object
- Speed differential
The following types of radar sensor are differentiated, depending on application:
- Short-range and long-range radar sensor:
- Short-range and long-range radar sensor (1)
- Multi-mode radar sensors:
- Outer front bumper radar sensor (2, 3)
- Outer rear radar sensor (4, 5)
The front short-range and long-range radar sensor (1) detects objects (e.g. vehicles) in both the short and long range. The integrated control electronics unit evaluates the object data from the front short-range and long-range radar sensor. The sensor cover around the front short-range and long-range radar sensor (1) is heated. This keeps the front short-range and long-range radar sensor (1) free of ice and snow. The heating for the sensor cover is actuated by the front short-range and long range radar sensor (1). The front short-range and long-range radar sensor (1) is connected to the vehicle's network architecture over the FlexRay.
The outer front bumper radar sensors are connected to the vehicle's network architecture over CAN.
The outer rear radar sensors are connected to the vehicle's network architecture over CAN.
The high bandwidth of the radar sensors allows a very precise position statement to be made and optimizes separation of objects lying close to each other.
| Component descriptions | |||
| Short and long-range radar sensor, component description | Model 223 | GF30.30-P-3126A | |
| Model 243 | GF30.30-P-3126B | ||
| Model 232 | GF30.30-P-3126F | ||
| Model 254 | GF30.30-P-3126H | ||
| Model 214 | GF30.30-P-3126K | ||
| Model 118, 177, 247 as of model year 2023 | GF30.30-P-3126L | ||
| Model 167 as of model year 2023 |
GF30.30-P-3126M | ||
| Model 294 | GF30.30-P-3126N | ||
| Model 192 | GF30.30-P-3126R | ||
| Model 236 | GF30.30-P-3126S | ||
| Component description for bumper radar sensors | Model 243 | GF30.30-P-3302B | |
| Model 118, 177, 247 as of model year 2023 | GF30.30-P-3302L | ||
| Model 167 as of model year 2023 |
GF30.30-P-3302M | ||
| Short range radar control unit, component description | Model 206 | GF54.21-P-0016C | |
| Model 297 | GF54.21-P-0016D | ||
| Model 295 | GF54.21-P-0016E | ||
| Model 296 | GF54.21-P-0016G |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.