Multicontour Seat Pneumatic Pump (MCS), Component Description - GF91.25-P-5205GR
MODEL 166 up to model year 2016 with CODE 399 (Multicontour front seats with massage function)
Shows model 166.0
Location
The multicontour seat pneumatic pump is located at the rear left in the cargo area, behind the side paneling.
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 t = 60 s of continuous operation of the multicontour seat pneumatic pump
- 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:
- Reading in of sensors and signals
- Evaluation of input factors
- Actuation of components
Reading in of 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
- Engine running status
- Massage intensity status
The functions that use these signals are described in the individual function descriptions (see appropriate block diagram or function schematic).
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 solenoid valve for draining the compression moisture in the pressure tank is actuated via an internal direct line.
The multicontour seat pneumatic pump does not send any requests via interior CAN. Only information about further processing and information for other control units is sent via the interior CAN.
| Wiring diagram for multicontour seat control unit | PE91.25-P-2103-97NAA |