Left Front Door Control Unit, Component Description - GF72.29-S-6001TRA

Model 447 

Except Code XM7 (MOPF II) 

Model 448 

View of left front door, model 447 

Location 

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

Tasks 

The left front door control unit has the following tasks:

• Reading of signals 
• Evaluation of input factors 
• Actuation of component parts 
• Transmitting signals 

Reading of signals 

The input factors are read via the following connections:

• Direct line 
• Left front door LIN (LIN B5) 
• Interior CAN (CAN B) 

Direct line 

The signals from the following component parts are read via direct lines:

• Left front door rotary tumbler microswitch (M14/3s1)
• Left front power window motor Hall sensor (M10/3)
• Driver central locking system inside door handle switch (S85/5)

Left front door LIN 

The signals for the following component parts are read via the left front door LIN:

• Left front door control panel (S47):
  • Left front power window assembly switch (S47s1)
  • Right front power window assembly switch (S47s2)
  • Left hinged window switch (S47s3) (with code W32 (Electric passenger compartment hinged window))
  • Right hinged window switch (S47s4) (with code W32 (Electric passenger compartment hinged window))
  • Rear child safety lock switch (S47s5) (with code W32 (Electric passenger compartment hinged window))
  • Outside mirror fold-in/out switch (S47s6) (with code FP3 (Mirror Package))
  • Left outside mirror adjustment switch (S47s7)
  • Right outside mirror adjustment switch (S47s8)
  • Outside mirror adjustment switch (S47s9)
• Driver electrical seat adjustment switch (S22/1) (with code SF1 (Luxury electrically adjustable driver's seat)):
  • Driver head restraint adjustment button (S22/1s1)
  • Driver seat inclination adjustment button (S22/1 s2)
  • Driver seat fore/aft adjustment button (S22/1 s3)
  • Driver seat height adjustment button (S22/1 s4)
  • Driver seat backrest adjustment button (S22/1 s5)
  • Driver seat cushion length button (S22/1 s6)
  • Driver memory function button (S22/1 s7)
  • Driver memory button 1 (S22/1s8)
  • Driver memory button 2 (S22/1s9)
  • Driver memory button 3 (S22/1s10)
  • Left seat climate control switch group (S203):
  • Left seat heating button (S203s1) (with code SF1 (Luxury electrically adjustable driver's seat) or code H16 (Heating for driver's seat))
  • Left seat ventilation button (S203s2) (with code SE0 (Seat climate control for driver))
  • Open central locking system button (S203s3)
  • Close central locking system button (S203s4)

Interior CAN 

The left front door control unit reads the following signals, among others, via the interior CAN:

• Circuit 15 status
• "Reverse gear engaged" signal
• Open/close central locking system (CL) request
• PRE-SAFE® adjustment request (with code JP1 (PRE-SAFE))
• Move to memory position request (with code SF1 (Luxury electrically adjustable driver's seat))
• Convenience feature request
• Crash signal

The resultant functions are described in the respective function descriptions.

Evaluation of input factors 

The input factors that have been read are evaluated by the integrated microprocessor and the relevant component parts are then actuated.

Actuation of component parts 

The actuation of the component parts takes place via the following connections:

• Direct line 
• Left front door LIN 

Direct line 

The following component parts are actuated via direct lines:

• Left front door central locking system actuator (M14/3)
• Left exit/warning lamp (E20/1)
• Left front door handle recess shell lighting (E23) (with code LC1 (Ambient lighting))
• Left front illuminated door sill panel (E28) (with code LC1 (Ambient lighting))
• Left front power window motor
• Left outside mirror (M21/4):
  • Left outside mirror turn signal lamp (M21/4e1)
  • Left outside mirror surround lighting (M21/4e2)
  • Left Blind Spot Assist readiness and warning display (M21/4e3) (with code JP2 (Driving Assistance Package) or with code JP4 (Lane Tracking Package))
  • Left mirror dimming (M21/4r4) (with code FP3 (Mirror Package))
  • Mirror up/down adjustment potentiometer (M21/4r3)
  • Mirror in/out adjustment potentiometer (M21/4r2)
  • Mirror fold-in motor (M21/4m3)
  • Mirror heater, left (M21/4r1)

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

Left front door LIN 

The left front door control unit transmits the following signals, among others, via the left front door LIN:

• Left or right outside mirror adjustment switch selection status display
• Rear child safety lock status display
• Seat heating status (with code SF1 (Luxury electrically adjustable driver's seat) or code H16 (Heating for driver's seat))
• Seat ventilation status (with code SE0 (Seat climate control for driver))

Transmitting signals 

The left front door control unit transmits the following signals, among others, via the interior CAN:

• Open/close power window assemblies request
• Open/close hinged window request
• Adjust right outside mirror request
• Convenience feature mode
• Convenience feature direction
• Status of CL
• Door status (open/closed)
• Seat ventilation request (with code SE0 (Seat climate control for driver))
• Seat heating request (with code SF1 (Luxury electrically adjustable driver's seat) or code H16 (Heating for driver's seat))
• Seat adjustment request (with code SF1 (Luxury electrically adjustable driver's seat))

The resultant functions are described in the respective function descriptions.

	Wiring diagram for left front door control unit (DCU)	Model 448	PE72.29-S-2101-97VDA
		Model 447.8 except code XM7 (MOPF II)	PE72.29-S-2101-97VVA
		Model 447.6/7 except code XM7 (MOPF II)	PE72.29-S-2101-97VVB