FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

GF72.29-P-6001CA Left Front Door Control Unit, Component Description



GF72.29-P-6001CA Left Front Door Control Unit, Component Description


Component Identification:






Location
The left front door control unit is located on the door module behind the door lining.

Task
The left front door control unit has the following tasks:
^ Reading in of signals
^ Evaluation of input factors
^ Actuation of components

Reading in of signals
The input factors are read in with the following connections:
^ Direct lines
^ Left door LIN (LIN B5)
^ Interior CAN (CAN B)

Direct lines
The signals from the following components are read via direct lines:
- Driver side front door infrared remote control receiver (A26/1) (left-hand drive vehicle)
- Left front door rotary tumbler switch (A85s1)
- Potentiometer for vertical inclination adjustment (M21/1r2) (with code (275) Memory package (driver seat, steering column, mirrors))
- Potentiometer for horizontal inclination adjustment (M21/1r3) (with code (275) Memory package (driver seat, steering column, mirrors))
- Hall sensor for left front door power window motor (M10/3)
- Trunk lid release button (S15/1)
- Left front door central locking interior switch (S85/5):
- Open central locking switch (S85/5s1)
- Close central locking switch (S85/5s2)

Left door LIN
The signals for the following components are read in via the left door LIN:
- Driver-side power window and outside mirror adjustment switch group (S20):
- Left front power window switch (S20s1)
- Right front power window switch (S20s2)
- Left rear power window switch (S20s3)
- Right rear power window switch (S20s4)
- Rear side window child safety lock switch (S20s5)
- Outside mirror fold-in/out switch (S20s9) (with code (249) Automatically dimming interior rearview mirror and outside mirror, including folding outside mirror, and without code (494) USA version)
- Left outside mirror adjustment switch (S20s10)
- Right outside mirror adjustment switch (S20s11)
- Outside mirror adjustment switch (S20s12)

- Left front seat adjustment switch group (S22) (with code (275) Memory function (driver seat, steering column, outside mirror)):
- Left front head restraint adjustment switch (S22s1)
- Left front seat inclination adjustment switch (S22s2)
- Left front seat fore/aft adjustment switch (S22s3)
- Left front seat height adjustment switch (S22s4)
- Left front seat backrest adjustment switch (S22s5)
- Left front memory function switch (S22s6)
- Left front memory 1 switch (S22s7)
- Left front memory 2 switch (S22s8)
- Left front memory 3 switch (S22s9)

The left front door control unit supplies the connected control elements with c. 58d.

Interior CAN
The signals are read in by the left front door control unit via the interior CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components
Components are actuated with the following connection:
^ Direct lines

Direct lines
The following components are actuated via direct lines:
- Left front door central locking motor (A85m1)
- Left front door additional door lock actuator motor (A85m4) (on vehicles for Great Britain)
- Left outside mirror turn signal lamp (E6/5)
- Left front door exit and warning lamp (E17/3)
- Left front door handle illumination (E17/11)
- Left front door warning lamp (E17/19)
- Left front door power window motor
- Left outside mirror (M21/1):
- Mirror dimming (M21/1h1) (with code (249) Automatically dimming interior rearview mirror and outside mirror, including folding outside mirror)
- Vertical inclination adjustment actuator motor (M21/1m1)
- Horizontal inclination adjustment actuator motor (M21/1m2)
- Outside mirror fold-in/out electric motor (M21/1m3) (with code (249) Automatically dimming interior rearview mirror and outside mirror, including folding outside mirror, and without code (494) USA version)
- Mirror heater (M21/1r1)