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Massage function for dynamic seat, function - GF91.25-P-2016LEA

MODEL 221.0 /1 with CODE (432) Left and right dynamic multicontour seat as of model year 2010 /YoM 09 MOPF 

Function requirements, general 

Function description for dynamic seat massage function, general 

To prevent any tension in the back during long journeys, the dynamic seat is equipped with a massage function.

Pressing the multicontour seat quick select button (A40/9s4) in the front central operating unit (A40/9) and selection of Submenus "Massage" on the SPLITVIEW display (A40/10) (with code (867) SPLITVIEW) or COMAND display (A40/8) (without code (867) SPLITVIEW), the air cushions in the 7-row massage insert in the lumbar support are inflated and deflated alternatively after selecting the massage program.

The massage function can be individually set using the turn/push control (A40/9s11):

IMPORTANT The massage function is described at the driver seat for left-hand drive vehicles by way of an example, but this also applies for the front passenger seat.

Open circuit 

When the following adjustment is made, any massage cycle in progress is terminated and the driver dynamic seat massage function main valve (Y24/20) is closed. The massage function continues with the next cycle after termination of the interruption conditions:

Abort conditions 

Blocking 

When the following fault is active, the function is blocked for the running ignition sequence:

The dynamic seat massage function is structured as follows:

Start and end 

By actuating the multicontour seat quick select button in the front central operating unit the submenu "Multicontour" seat is activated on the SPLITVIEW display (with code (867) SPLITVIEW) or COMAND display (without code (867) SPLITVIEW).

Following selection, choose the "Massage" submenu for the driver or front passenger seat. Pressing the rotary pushbutton downwards or upwards or turning it enables the massage function to be individually adjusted in 4 different programs or to be switched off.

The massage function can also be activated via the freely programmable button (A40/9s10) in the front central operating unit. However, previously the massage function must be assigned to the freely programmable button. For this purpose select menu "Vehicle", then submenu "System settings" and the menu "Select favorites" via the menu guidance on the SPLITVIEW display (with code (867) SPLITVIEW) or COMAND display (without code (867) SPLITVIEW) with the rotary pushbutton.

Sequence of programs 

Massage "Slow and non-intense" 

After activating the program in the submenu, first the air is fed over the driver dynamic seat massage function main valve to the left front seat massage function actuator motor, actuated by the left front dynamic seat control unit (N32/19). Starting with the lower air cushion in the massage insert, the contour of the 1st layer of the massage insert is sequentially altered by inflating, maintaining and relieving the pressure. After a defined waiting time, the cycle for layer 2 is started according to the same pattern.

If the waiting time has elapsed during inflation of layer 7 of the massage insert, the cycle is continued with layer 6 if the so-called turn period has expired. The layers are then actuated in reverse order down to layer 1. The cycle starts again from the beginning. The left front seat massage function actuator motor has a total of 23 valve positions, which are actuated during a massage cycle.

The pressure difference between the deflated and the inflated lumbar support cushion is approx. 100 mbar. A wave motion is created by alternately inflating and deflating the lumbar support cushion.

Massage "Slow and non-intense" (rolling) 

The program sequence is the same as for "Massage 1 slow and weak", except that the air cushions are inflated at higher pressure and the program sequence lasts longer.

Massage "fast and non-intense" (wavy) 

As long as the massage function is active, the contour of the massage inserts is sequentially altered, first by inflating layer 1 for a defined inflation period, maintaining the pressure for a defined holding time and then deflating layer 1 for a defined deflation period. After a defined waiting time, the cycle for layer 2 is started according to the same pattern.

If the waiting time has elapsed during inflation of layer 7 of the massage insert, the cycle is continued with layer 1.

Massage "fast and intense" (wavy); 

The program sequence is the same as for "Massage 3, fast and non-intense", except that the air cushions are inflated to a higher pressure and the program sequence lasts longer. The difference in pressure between a deflated and an inflated massage cushion is approx. 150 mbar. A wave motion is generated through alternate inflation and deflation of the massage cushions.

After approx. 12 to 24 minutes, depending on the selected program, the massage function is automatically ended and the massage insert air cushions are deflated.

Main valve control 

The driver dynamic seat main valve is actuated by the left front dynamic seat control unit and is located on a mount fastened to the left front dynamic seat control unit.

Control of massage function actuator motor 

The left front seat massage function actuator motor is actuated by the left front dynamic seat control unit. The left front seat massage function actuator motor has a total of 23 valve positions which are actuated during a massage cycle.

The 23 valve positions are responsible for different pneumatic inflating and deflating procedures of the air cushions in the massage function. The adjustments are monitored with two reference positions (limit switch). Parallel to the control cycle, the individual steps are counted and monitored by the left front dynamic multicontour seat control unit.

Compressed-air supply 

The air supply, required for inflating the air cushions, is provided by the pneumatic pump for dynamic seat control.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic for dynamic seat (FDS)   PE91.25-P-2050-97SAD
  COMAND controller unit, component description A40/3
On vehicles with code (526) COMAND with single DVD drive (without navigation) or with code (527) COMAND APS with single DVD drive (with navigation)		 GF82.85-P-3136LE
On vehicles with code (529) HIGH Class Japan GF82.85-P-3136LEJ
On vehicles with code (530) COMAND APS USA (with navigation) GF82.85-P-3136LEU
  COMAND display, component description A40/8
Vehicles without code (867) SPLITVIEW		 GF54.30-P-6110LE
  Front central operating unit, component description A40/9 GF54.21-P-4500LE
  SPLITVIEW display, component description A40/10
Vehicles with code (867) SPLITVIEW		 GF54.30-P-6120LE
  Dynamic seat control unit, component description N32/19, N32/22 GF91.25-P-5202LEA 
  Pneumatic pump for dynamic seat, component description M40/1 GF91.25-P-5204LE 
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