Component description for the position sensor tumble flap - GF07.04-P-6230V

ENGINE 272.920 in MODEL 203

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203, 209

ENGINE 272.941 in MODEL 203

ENGINE 272.942 in MODEL 171

ENGINE 272.943 in MODEL 211

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251

ENGINE 272.946 in MODEL 221

ENGINE 272.960 in MODEL 203, 209

ENGINE 272.963 in MODEL 171

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221

ENGINE 272.966 in MODEL 230

ENGINE 272.967 in MODEL 164, 251

ENGINE 272.970 in MODEL 203

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221

ENGINE 273.922 in MODEL 221

ENGINE 273.923 in MODEL 164

ENGINE 273.924 in MODEL 221

ENGINE 273.943 in MODEL 164

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251

ENGINE 273.965 in MODEL 230

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221

Location

The position sensors are located at the rear on the intake manifold over the tumble flap shafts.

Fig 1: Identifying Left And Right Intake Manifold Tumble Flap Position Sensor - Engines 272.920/940/941/960/970

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Task

To diagnose the tumble flap switchover, the position sensors detect the mechanical limit positions of the shafts. The swivel range of the tumble flaps between completely swiveled in or out is approx. 56°.

Design

The position sensors function according to the Hall principle.

Function

Two cylindrical magnets with different polarities are attached to each tumble flap shaft.

After swinging out the tumble flaps a cylindrical magnet is located at the Hall sensor and the position sensor interconnects. The signal at the ME-SFI [ME] control unit is about 0 V (tumble flaps actuated).

If the tumble flaps swing back then the other poled cylindrical magnet is on the Hall sensor is in the rest position. The position sensor opens and interrupts the connection to ground. The signal at the ME-SFI [ME] control unit is now about 5 V (tumble flaps not actuated). The position sensors must switch no later than approx. 5° before the respective limit position. For reasons of tolerance, they may also switch up to approx. 16° before the limit position.