Right front door control unit, component description - GF72.29-P-4142GZ

MODEL 164.1/8

Location

The right front door control unit is located in the upper area of the right door inside.

Fig 1: Identifying Right Front Door Control Unit

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Task

The right front door control unit is connected with the controller area network bus, class B (interior compartment) (CAN B) to exchange data and has the following tasks:

Reading the following switches:

Front passenger power window switch (S21/2)

Reading the following sensors:

Right front power window motor Hall sensor (M10/4)
Mirror up/down adjustment potentiometer (M21/2r2)
Mirror in/out adjustment potentiometer(M21/2r3)

Switching loads via internal semi-conductor switches:

Right outside mirror turn signal lamp (E6/6)
Right front door entrance/exit lamp (E17/4)
Right front door inside handle illumination (E17/12)
Right front power window motor (M10/4)
Right front door CL [ZV] motor (M14/5)
Mirror up/down adjustment motor (M21/2m1)
Mirror in/out adjustment motor (M21/2m2)
Right outside mirror ambient lamp (M21/2e1)
Automatic dimming mirror (M21/2h1)
Mirror fold-in motor (M21/2m3)
Mirror heater (M21/2r1)
Illumination for front passenger power window switch

The right front door control unit is connected with the CAN interior bus to exchange data.

The front passenger power window switch is read in by the right front door control unit via a LIN BUS

Task in combination with air conditioning

The right front door control unit senses the window position in the right front door of the vehicle and stores this information on the CAN interior.

The AAC control and operating unit (N22) or the comfort AAC control and operating unit (N22/7) reads in the signals for the "Driver door ON" window position, to achieve better control quality in the open position

Recirculated air convenience closing, task

When the air recirculation switch (N22s2 or N22/7s2) is pressed for longer than 1.5 s, the convenience closing function is activated. The right front door control unit stores the momentary window position and closes the window - if open - in the automatic function. When the convenience closing function is completed, the window is returned to the stored position when the air recirculation switch is pressed again for longer than 1.5 s.