Passenger-side front door control unit, component description - GF72.29-P-6010SX

MODEL 221.0 /1 up to Model Year 8

Fig 1: Locating Front Right Door Control Module

Courtesy of MERCEDES-BENZ USA

Location

The right front door control unit is located on the door module behind the door paneling.

General

The right front door control unit is connected with the passenger compartment CAN bus for exchanging data.

Task

The right front door control unit reads in the following sensors and switches, actuates their function and instrument illumination if applicable and switches following loads via semi-conductor switches.

Controlling and switching loads via semi-conductor switches

Right front CL motor (A85/1m1)
Right front power closing motor (A85/1m3)
Right front door additionally lock motor (A85/1m4) (only in Great Britain)
Right outside mirror turn signal lamp (E6/6)
right front door entrance and exit lamp (E17/4)
Right front door inside handle illumination (E17/12)
Front right door warning lamp (E17/21)
Right front door trim strip illumination (E17/44)
Right front power window motor (M10/4)
Right electrically adjustable and heated outside mirror (M21/2)
Mirror fold-in motor (M21/2m3)
Mirror heater (M21/2r1)

Reads in the following sensors

Hall sensors for right front power window motor
Mirror up/down adjustment potentiometer (M21/2r2)
Mirror in/out adjustment potentiometer (M21/2r3)

Reading in the following switches:

Right front rotary tumbler switch (A85/1s1)
Right front drive lock pawl switch (A85/1s2)
Right front safety limit switch (A85/1s3)
Front passenger power window switch (S21/2)
Right front seat operation switch group (S23)
- Head restraint adjustment switch (S23s1)
- Seat cushion fore/aft switch (S23s2)
- Fore/aft, height and inclination adjustment switch (S23s3)
- Backrest switch (S23s5)
- Memory switch (S23s6)
- Memory 1 switch (S23s7)
- Memory 2 switch (S23s8)
- Memory 3 switch (S23s9)
- Left or right seat adjustment selection switch (S23s10)
- Seat ventilation switch (S23s11)
- Heated seat switch (S23s12)
Right interior CL switch (S85/6)

Signal inputs and outputs

Circuit 30
Circuit 58d

Switch functions via front door LIN

The power window switch group and right front seat operation switch group are connected with the right front door control unit via front door LIN.

Thermal protection for right front power window motor

The right front door control unit calculates the actuation duration, operating voltage, RPM of the right front power window motor as well as the outside and inside temperature at the bearing points on the right front power window motor to protect the right front power window motor. When a temperature of T = 85 °C is reached, the right front power window motor is actuated only as long as the request is present or the end position is reached.

During automatic raising it is still possible to reverse directions when the overload protection force limitation is actuated. It is possible to reactuate the right front power window motor after a cooling phase calculated by the right front door control unit.