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

ENGINE 156, 273, 275 in MODEL 216 with CODE (233) Distronic Plus as of model year 2009 up to model year 2010/AEJ 08 up to AEJ 09 

ENGINE 156, 272, 273, 275, 642, 629 in MODEL 221 with CODE (233) Distronic Plus as of model year 2009 up to model year 2010/AEJ 08 up to AEJ 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 the target evaluation of 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 DTR controller unit sends the long range radar target data via the dynamics CAN (CAN H) to the radar sensors control unit (for vehicle longitudinal control by 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 DTR control unit are integrated within the DTR controller unit.

Properties of the long range radar:

• Detection range of radar sensor from 10 to 150 m
• Detection angle of the radar beam 18° (sharp beam bundling)
• 77 GHz radar sensor operating on the pulse Doppler principle for independent measurement of distance and speed
• Fully integrated electronics version (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-2101-99CAA
		A89	Model 221	PE30.30-P-2101-99SAA