GF91.29-P-5241CA Front Passenger Seat Control Unit, Component Description

GF91.29-P-5241CA Front Passenger Seat Control Unit, Component Description
- with CODE (242) Electrically adjustable front passenger seat with memory.

Component Identification:

Location
The front passenger seat control unit (N32/2) is beneath the seat cushion at the frame of the front passenger seat.

Task
- Control of seat adjustment in accordance with the requests sent over the interior CAN (CAN B)
- Storing of the memory adjustments for the seat
- Control of head restraint presetting
- Control of rear easy entry
- Control of the collision avoidance with bench seat in rear (only model 207.3 (C207) with code (287) Through-loading feature)
- Actuating PRE-SAFE positioning function for front passenger seat

The PRE-SAFE positioning function of the passenger seat is described in the separate "PRE-SAFE" function description.

The tasks are subdivided as follows:
^ Reading in of sensors and signals
^ Evaluating input factors
^ Actuation of components

Reading in of sensors and signals
These input factors are read in via the following connections:
^ Direct line
^ Interior CAN

Direct line
- Circuit 30
- Circuit 31

The following sensors are read in via direct lines:
- Hall sensors of the seat adjustment motors
- Left EASY-ENTRY system limit switch (S159/3) (right-hand drive vehicle)
- Right EASY-ENTRY system limit switch (S159/4) (left-hand drive vehicle)

The EASY-ENTRY system limit switch of two contact switches, backrest inclination switch contact switch and backrest release contact switch.

The signals are read in/transmitted by the front passenger seat control unit. The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic for corresponding system).

Interior CAN
- Signals for PRE-SAFE positioning function provided by Electronic Stability Program control unit (N30/4) (vehicles without code (233) DISTRONIC PLUS) or by Electronic Stability Program Premium control unit (N30/7) (vehicles with code (233) DISTRONIC PLUS) on chassis CAN (CAN E), routed by front SAM control unit with fuse and relay module (N10/1) onto interior CAN (CAN B) and sent to the front passenger seat control unit (N32/2).
- Left front seat adjustment switch group (S22) by left front door control unit (N69/1) (right-hand drive vehicle)
- Right front seat adjustment switch group (S23) by right front door control unit (N69/2) (left-hand drive vehicle)

Only model 207.3 (C207) with code 287 Through-loading feature for control of the collision avoidance with bench seat in rear:
- Status from left rear backrest inclination switch (S54/5) or right rear backrest inclination switch (S54/6) via rear SAM control unit with fuse and relay module (N10/2)
- Status from left rear backrest inclination switch (S54/7) or right rear backrest limit switch(S54/8) via rear SAM control unit with fuse and relay module (N10/2)

Evaluation of input factors
The read in input factors are evaluated by the front passenger seat control unit. The actuation of the motors for the seat adjustment takes place via integrated relays.

Actuation of components
The actuation of the components takes place via the following connections:
^ Direct line

Direct line
The following motors are actuated via direct lines:
- Front passenger seat fore/aft adjustment motor (M28/1)
- Front passenger seat height adjustment motor (M28/2)
- Front passenger seat inclination adjustment motor (M28/3)
- Front passenger seat head restraint adjustment motor (M28/4)
- Front passenger seat backrest inclination adjustment motor (M28/5)

Variants
There are no variants for the hardware of the front passenger seat control unit.
The country or left-hand drive vehicle/right hand drive vehicle allocation is software coded.