Component description for DTR controller unit - GF30.30-P-3210LEB

ENGINES 156, 273, 275 in MODEL 216 up to 31.8.10 with CODE (233) Distronic Plus as of model year 2010/YoM 09 

ENGINES 156, 272, 273, 275, 642, 629 in MODEL 221 up to 31.8.10 with CODE (233) Distronic Plus as of model year 2010/YoM 09 model refinement package 

Front view of vehicle model 221 

Location 

The DTR controller unit is located in the center behind the radiator grille.

Task 

The DTR controller unit has the following tasks:

• Actuation, supply and evaluation of signals received by DTR radar sensor (A89b1)
• Control of target evaluation by long range radar
• Transfer of vehicle longitudinal control data to the radar sensors control unit (SGR) (N62/1)

The DTR control unit (A89n1) integrated in the DTR controller unit actuates the DTR radar sensor (long range sensor) and evaluates the target data. The DISTRONIC control unit transmits the data from the long range sensor from the DTR controller unit via the dynamics CAN (CAN H) to the radar sensors control unit (for control of the vehicle in the longitudinal direction of the DISTRONIC PLUS).

Input and output signals 

The following input signals are evaluated by the DTR controller unit and transmitted as output signals:

• Direct input signals 
• Direct output signals 
• CAN input signals 
• CAN output signals 

Direct input signals 

• Circuit 87
• Circuit 31

Direct output signals 

• None

CAN input signals 

• Radar request
• Diagnosis request

CAN output signals 

• Radar data
• Diagnostic data

Design 

The DTR radar sensor and the DTR control unit are integrated within the DTR controller unit.

Properties of the long range radar:

• Detection range of radar sensor from 0 to 200 m
• Detection angle of the radar beam is 60° for detection areas from 0 to 60 m and 18° for detection areas from 0 to 200 m
• 77 GHz radar sensor operating on the pulse Doppler principle for independent measurement of distance and speed
• Fully integrated electronics system (high frequency circuit in the DTR controller unit)

View of radiator grille 

The radar plate is a radar-permeable cover in the radiator grille, which is required for the Distronic PLUS to function correctly.

The radar plate has the following tasks:

• Shielding against external effects (such as dirt, ice or insects)
• Ensuring optimal transmission and reception properties of the radar sensor

	Wiring diagram for Distronic (DTR) control unit	A89 Model 216	PE30.30-P-2101-97CAB
		Model 221	PE30.30-P-2101-97SAB