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Wheel speed sensor, location / task / function - GF27.19-P-5127G

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TRANSMISSION 722.6 

Fig 1: Identifying Wheel Speed Sensor Components
G04606433Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  Wheelspeed sensor location The RPM sensors 2 and 3 (Y3/6n2 and Y3/6n3) are permanently connected with the supporting body of the electrical control unit (Y3/6) via contact tongues.  
  Wheelspeed sensor - Function The signals from the RPM sensors 2 3 (Y3/6n2, Y3/6n3) are recorded in the ETC control module (N15/3) together with the wheel and engine speeds and other information, and are the input signals for the electronic control system.  
  Speed sensor, function   GF27.19-P-5127-04G