Multicontour Seat Pneumatic Pump (MCS), Component Description - GF91.25-P-5205LF

Model 217, 222 

With Code 432 (Dynamic seats left and right) 

Model 222 

With Code 406 (Multicontour rear seat) 

Shown model 222.0 

Location 

The multicontour seat pneumatic pump is located in the left rear in the trunk.

Tasks 

The multicontour seat pneumatic pump has the following tasks:

• Compressed air supply for the multicontour seats
• Pressure monitoring of the compressed air reservoir by means of a sensor
• Switch on/off of internal solenoid valve for compressed air supply
• Pneumatic system leak detection
• Automatic shutoff of compressed air supply after 60 s of continuous operation
• Overpressure run of pneumatic system and subsequent actuation of solenoid valve on pressure tank for draining compression moisture in pressure tank

The tasks are subdivided as follows:

• Read in sensors and signals 
• Evaluation of input factors 
• Actuation of components 

Read in sensors and signals 

The input factors are read in via the following connections:

• Direct line 
• Interior CAN (CAN B) 

Direct line 

The signals of the pressure sensor in the multicontour seat pneumatic pump are read in by an internal direct line.

Interior CAN 

The multicontour seat pneumatic pump reads in the following signals via interior CAN, among other things:

• Compressed air supply request
• Massage intensity status
• Dynamic function status

Evaluation of input factors 

The read in input factors are evaluated by the pneumatic pump for multicontour seat. The pneumatic pump is actuated accordingly.

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• Interior CAN 

Direct line 

The multicontour seat pneumatic pump actuates the solenoid valve for draining the compression moisture in the pressure tank via an internal direct line.

Interior CAN 

The signals sent by the multicontour seat pneumatic pump via the interior CAN include the following:

• Status information
• Diagnostic data

	Wiring diagram for multicontour seat control unit	Model 217 with code 432 (Dynamic seats left and right) Model 222 up to model year 2018 with code 432 (Dynamic seats left and right)	PE91.25-P-2103-97SEC
		Model 222 as of model year 2018 with code 432 (Dynamic seats left and right)	PE91.25-P-2103-97SEG
		Model 217 with code 432 (Dynamic seats left and right) Model 222 up to model year 2018 with code 432 (Dynamic seats left and right)	PE91.25-P-2103-97SED
		Model 222 as of model year 2018 with code 432 (Dynamic seats left and right)	PE91.25-P-2103-97SEH
		Model 222 up to model year 2018 with code 406 (Multicontour rear seat)	PE91.25-P-2103-97SEA
		Model 222 as of model year 2018 with code 406 (Multicontour rear seat)	PE91.25-P-2103-97SEE
		Model 222 up to model year 2018 with code 406 (Multicontour rear seat)	PE91.25-P-2103-97SEB
		Model 222 as of model year 2018 with code 406 (Multicontour rear seat)	PE91.25-P-2103-97SEF