GF54.21-P-6040GM Upper Control Panel Control Unit, Component Description

GF54.21-P-6040GM Upper Control Panel Control Unit, Component Description

Component Identification:

Location
The upper control panel control unit is located in the center of the instrument panel.







Design (model 164 except model 164.195)
The upper control panel control unit (N72/1) contains the following operating and display components:
- Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
- ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
- ESP OFF switch (N72/1s1)
- Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Hazard warning system switch (N72/1s5)
- Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Downhill Speed Regulation switch (N72/1s24) (with code (430) Off-road package)
- Off-road program switch (N72/1s25) (with code (430) Off-road package)
- STH switch (N72/1s30) (with code (228) Stationary heater)
- Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))







Design (model 164.195)
The upper control panel control unit (N72/1) contains the following operating and display components:
- Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
- ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
- ESP OFF switch (N72/1s1)
- Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Hazard warning system switch (N72/1s5)
- PTS OFF switch (N72/1s8) (with code (220) PARKTRONIC)
- Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Transmission mode switch (N72/1s32) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Refueling safety detection switch (N72/1s46)







Structure (model 251)
The upper control panel control unit (N72/1) contains the following operating and display components:
- Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
- ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
- ESP OFF switch (N72/1s1)
- Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Hazard warning system switch (N72/1s5)
- PTS OFF switch (N72/1s8) (with code (220) PARKTRONIC)
- Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- STH switch (N72/1s30) (with code (228) Stationary heater)
- Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
- Transmission mode switch (N72/1s32) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))

Task
The upper control panel control unit has the following tasks:
^ Reading in of switches and signals
^ Evaluation of input factors
^ Actuation of components

Reading in of switches and signals
The input factors are read in with the following connections:
^ Direct line
^ Instrument panel LIN (LIN 1)
^ Interior CAN

Direct line
The signals from the switches in the upper control panel control
unit are read in directly.

LIN 1
The following components are read in via LIN 1:
- Rotary light switch (S1)
- Lower control panel control unit (N72) (model 164)

Interior CAN
The following sensors and information are read-in over the interior CAN:
- From the instrument cluster (A1):
- Dimming of instrument illumination

- From STH control unit (A6n1):
- Status of stationary heater

- From the restraint system control unit (N2/7) over the central gateway control unit (N93):
- Status of front passenger seat occupied and child seat recognition sensor

- From the front SAM control unit (N10):
- Status of front seat heaters (with code (873) Heated left and right front seats or with code (401) Front comfort seats, incl. seat heating and seat ventilation)

- From the rear SAM control unit (N10/8):
- Status of antitheft theft alarm system (ATA [EDW]) (with code (551) Antitheft alarm system (ATA [EDW]))
- Status of hazard warning system
- Status of refueling safety detection (on model 164.195)
- From seat heater, seat ventilation and steering wheel heater control unit (N25/7) (with code (872) Electric seat heater for left and right rear seats, with code (401) Front comfort seats, incl. seat heating and seat ventilation and with code (443) Steering wheel heater):
- Status of rear seat heaters and front seat ventilation

- From ESP control unit (N47-5) (except model 164.195) or regenerative braking system control unit (N30/6) (on model 164.195) via central gateway control unit:
- Status of Electronic Stability Program (ESP)
- Status of Downhill Speed Regulation (with code (430) Offroad package)
- Status of Offroad program (with code (430) Offroad package)

- From AIRMATIC control unit (N51) (with code (489) Airmatic (air suspension with level adjustment and Adaptive Damping System (ADS)) via central gateway control unit:
- Status of level control
- Status of shock absorber adjustment

- From PTS control unit (N62) (with code (220) PARKTRONIC):
- Status of PARKTRONIC

- From EZS control unit (N73):
- Circuit status

- From fully integrated transmission control unit (VGS) (Y3/8n4) (except model 164.195) or from hybrid fully integrated transmission control controller unit (Y3/10) (on model 164.195) via central gateway control unit:
- Status of transmission mode

Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components
Components are actuated with the following lines:
^ Direct line
^ LIN 1
^ Interior CAN

Direct line
The following components are actuated via a direct line:
- Automatic child seat recognition airbag OFF indicator lamp
- ATA [EDW] function indicator
- Switch and controls illumination and function indicators of integrated switches

LIN 1
The following components are actuated via LIN 1:
- Lower control panel control unit (power supply and switch and controls illumination)
- Rotary light switch (switch and controls illumination)

Interior CAN
The signals are sent by the upper control panel control unit over the interior CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).