Left front seat control unit, component description - GF91.29-P-5230SX
MODEL 221.0/1, 216.3 up to Model Year 8
Location
The left front seat control unit is located on the seat cushion frame of the driver seat (1).
Tasks
The left front seat control unit has the following tasks:
- Actuation of the seat adjustment
- Actuation of seat belt comfort fit feature
- Control of lumbar support adjustment
(without code (409) Left/right front multicontour seats and without code (432) Left and right dynamic multicontour seat)
- Control of heated seats HS [SIH]
(on model 221 with code (873) Right and left front seat heaters or code (401) Front comfort seats, incl. seat heating and seat ventilation and on model 216)
- Control of seat ventilation
(with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Control of memory function
(on model 221 with code (275) Memory package (driver seat, steering column, mirrors) and on model 216)
- Control of easy entry/exit feature
(on model 221 with code (275) Memory package (driver seat, steering column, mirrors) and on model 216)
- Actuation of footwell illumination in rear
(on model 221)
Discrete outputs
Voltage supply for the following components:
- Left rear footwell lamp (E17/18)
(on model 221)
- Left front seat fore/aft adjustment motor (M27/1)
- left front head restraint motor (M27/4)
- Left front backrest angle adjustment motor (M27/5)
- left front seat cushion fore/aft motor (M27/8)
- left front seat cushion inclination motor (M27/9)
- left front seat height adjustment motor (M27/10)
- Left front seat belt comfort solenoid (K18/4)
- Left front seat belt lock relay (K18/2)
(on model 216)
- Left front seat heated cushion (R13/1)
(on model 221 with code (873) Right and left front seat heaters or code (401) Front comfort seats, incl. seat heating and seat ventilation and on model 216)
- Left front backrest heated cushion (R13/2)
(on model 221 with code (873) Right and left front seat heaters or code (401) Front comfort seats, incl. seat heating and seat ventilation and on model 216)
- Left front seat cushion ventilation motor group (M18/9)
(with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Left front seat backrest ventilation motor group (M18/10)
(with code (401) Front comfort seats, incl. seat heating and seat ventilation)
Discrete inputs
- Circuit 30
- Circuit 31
- Hall sensors of the motors (M27/1, M27/4, M27/5, M27/8, M27/9 and M27/10)
- Driver lumbar support regulator control unit (N32/23)
(without code (409) Left/right front multicontour seats and without code (432) Left and right dynamic multicontour seat)
- Vehicle-sensitive seatbelt lock sensor (A60)
(on model 216)
- Left front seat backrest angle microswitch (S91/1)
(on model 216)
The left front seat control unit serves as a contact point for:
- Left front seat ventilation blower regulator (N29/5)
(with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Driver lumbar support regulator control unit (N32/23)
(without code (409) Left/right front multicontour seats and without code (432) Left and right dynamic multicontour seat)
- Left front multicontour backrest control unit (N32/15)
(with code (432) Left and right dynamic multicontour seat)
CAN signals
The left front seat control unit is an interior CAN participant.