Component description for DISTRONIC electric controller unit - GF30.30-P-3213FL

ENGINE 271, 272, 273, 642, 651 in MODEL 207 with CODE (233) Distronic Plus 

ENGINE 156, 271, 272, 273, 642, 651 in MODEL 212 with CODE (233) Distronic Plus 

Front view of vehicle model 212 

Fig 1: Distronic Electric Controller Unit

Courtesy of MERCEDES-BENZ USA

Location 

The DISTRONIC electric controller unit is located in the middle behind the radiator grille.

Task 

The DISTRONIC electric controller unit has the following tasks:

• Actuation, supply and evaluation of target data for the integral DISTRONIC radar sensor (A89b1) (long range sensor)
• Control of the target evaluation (long range radar)
• Transmitting data for vehicle longitudinal control to the radar sensors control unit (N62/1)

The DISTRONIC control unit (A89n1) integrated in the DISTRONIC controller unit actuates the DISTRONIC radar sensor and evaluates the target data. The DISTRONIC control unit transmits the target data from the long range sensor from the DISTRONIC 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 and output signals delivered by the DISTRONIC electric controller:

• 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 

• Target data of the radar
• Diagnostic data

Design 

The DISTRONIC radar sensor (long range sensor) and the DISTRONIC control unit are integrated in the DISTRONIC electric 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 DISTRONIC electric controller unit)

View of radiator grille 

Fig 2: Radar Plate

Courtesy of MERCEDES-BENZ USA

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

Its tasks are as follows:

• 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 207	PE30.30-P-2101-97EAA
		A89 Model 212	PE30.30-P-2101-97DAA