ATA/tow-away protection/interior protection control unit, component description - GF80.50-P-4131RF

Model 205, 253 with code 551 (Anti-theft warning system) with code 882 (Interior motion sensor)

Model 205.0/1/2, 253, shown on model 205.0

Fig 1: Identifying ATA (EDW)/Towing Sensor/Interior Motion Sensor Control Unit

Courtesy of MERCEDES-BENZ USA

Location

The ATA [EDW]/tow-away protection/interior protection control unit is attached to the overhead control panel control unit (N70).

Task

The ATA [EDW]/tow-away protection/interior protection control unit has the following tasks:

Reading in of sensors and signals
Evaluation of input factors
Output of signals
Sending and receiving ultrasonic waves (model 205.0/1/2, 253)
Recognizing changes of vehicle inclination

Reading in of sensors and signals

The input factors are read in via the following connections:

Alarm system LIN (LIN B14)
Interior CAN (CAN B)

Alarm system LIN

The ATA/tow-away protection/interior protection control unit reads in the signals from the alarm siren (H3/1) via the alarm system LIN.

Interior CAN

The signals are read in by the anti-theft alarm system/emergency call system button group via the interior CAN. The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Output of signals

The signals are issued through the following connections:

Alarm system LIN
Interior CAN

Alarm system LIN

The ATA/tow-away protection/interior protection control unit transmits the request for alarm output to the alarm siren via the alarm system LIN.

Interior CAN

The signals are transmitted by the anti-theft alarm system/emergency call system button group via the interior CAN. The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Sending and receiving ultrasonic waves (model 205.0/1/2, 253)

The ATA/tow-away protection/interior protection control unit monitors the vehicle interior for motion by transmitting and receiving ultrasonic waves. The anti-theft alarm system/emergency call system button group includes the following components:

Interior protection receiver (N26/6a1)
Left interior protection transmitter (N26/6b1)
Right interior protection transmitter (N26/6b2)

Recognizing changes of vehicle inclination

If the inclination sensor integrated into the ATA/tow-away protection/interior protection control unit recognizes an alarm-relevant change of inclination, an alarm is output.

Wiring diagram for overhead control panel (OCP) control unit

PE54.21-P-2107-97FBA