DTR controller unit, component description - GF30.30-P-3210GQ

ENGINES 156, 272, 273, 629, 642 in MODEL 164.1 with CODE (219) Distronic (DTR) as of model year 2009 up to model year 2010/as of CY 08 model refinement package up to CY 09 

ENGINES 273, 629, 642 in MODEL 164.8 with CODE (219) Distronic (DTR) as of Model Year 2009 up to Model Year 2010/as of CY 08 up to CY 09 model refinement package 

ENGINES 272, 273, 642 in MODEL 251 with CODE (219) Distronic (DTR) as of model year 2009 up to model year 2010/as of CY 08 up to CY 09 

Front view of vehicle model 164.1 

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 (radar)
• Transmitting data for vehicle longitudinal control to the ESP control unit (N47-5)

The DTR control unit (A89n1) integrated in the DTR controller unit actuates the DTR radar sensor and evaluates the target data. The DTR controller unit sends the radar data over the dynamics CAN (CAN H) to the ESP control unit (for the Distronic longitudinal movement control).

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.

Radar characteristics

• Detection range of radar sensor from 10 to 150 m
• Detection angle of the radar beam ± 9° (sharp beam bundling)
• 77 GHz radar sensor according to the "Pulse Doppler Principle" for independent measurement of distance and speed
• Fully integrated electronic implementation (high frequency circuits in DTR controller unit)

View of radiator grille on model 164.1 

The radar plate is a radar transparent cover in the radiator grille which is necessary for correct functioning of the DISTRONIC.

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 164	PE30.30-P-2101-99MAA
		A89	Model 251	PE30.30-P-2101-99RAA