Driver-side front door control unit, component description - GF72.29-P-6000SX
MODEL 221.0 /1 up to Model Year 8
Location
The left front door control unit is located on the door module behind the door lining.
General
The left front door control unit is connected to the passenger compartment CAN bus for exchanging data.
Task
The left 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
- Left front CL motor (A85m1)
- Left front power closing motor (A85m3)
- Left front door additional lock motor (A85m4) (only in Great Britain)
- Left outside mirror turn signal lamp (E6/5)
- left front door entrance and exit lamp (E17/3)
- Left front door inside handle illumination (E17/11)
- Front left door warning lamp (E17/19)
- Left front door trim strip illumination (E17/43)
- Left front power window motor (M10/3)
- Left electrically adjustable and heated outside mirror (M21/1)
- Mirror fold-in motor (M21/1m3)
- Mirror heater (M21/1r1)
Reads in the following sensors
- Driver door infrared sensor (B58)
- Hall sensors for left front power window motor
- Mirror up/down adjustment potentiometer (M21/1r2)
- Mirror in/out adjustment potentiometer (M21/1r3)
Reading in the following switches:
- Left front rotary tumbler switch (A85s1)
- Left front drive lock pawl switch (A85s2)
- Left front safety limit switch (A85s3)
- Left interior CL [ZV] switch (S85/5)
- Driver power window outside mirror and trunk lid switch group (S20/1)
- Left front power window switch (S20/1s1)
- Right front power window switch (S20/1s2)
- Left rear power window and side window roller blind switch (S20/1s3)
- Right rear power window and side window roller blind switch (S20/1s4)
- Rear side windows child safety lock switch (S20/1s5)
- Trunk lid open/close switch, driver (S20/1s6) (with code (881)
Remote trunk closing (RTC))
- Outside mirror fold-in/out switch (S20/1s9)
- Left/right outside mirror adjustment selection switch (S20/1s10)
- Outside mirror adjustment rocker switch (S20/1s12)
- Left front seat operation switch group (S22)
- Head restraint adjustment switch (S22s1)
- Seat cushion forward/back switch (S22s2)
- Fore/aft, height and inclination adjustment switch (S22s3)
- Backrest switch (S22s5)
- Memory switch (S22s6)
- Memory 1 switch (S22s7)
- Memory 2 switch (S22s8)
- Memory 3 switch (S22s9)
- Left or right seat adjustment selection switch (S22s10)
- Seat ventilation switch (S22s11)
- Heated seat switch (S22s12)
Signal inputs and outputs
- Circuit 30
- Circuit 58d
Switch functions via front door LIN
The driver power window, outside mirror and trunk lid switch group and the left front seat operation switch group as well as the left interior CL switch are connected with the left front door control unit via front door LIN.
Thermal protection for left front power window motor
The left front door control unit calculates the actuation duration, operating voltage, RPM of the left front power window motor as well as the outside and inside temperature at the bearing points on the left front power window motor to protect the left front power window motor.
When a temperature of T = 85 °C is reached, the left 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 left front power window motor after a cooling phase calculated by the left front door control unit.