Supplemental Restraint System Control Unit, Component Description - GF91.60-P-4080FR
Model 257, 290
up to model year 2021
Location
The Supplemental Restraint System control unit is located on the transmission tunnel.
Tasks
The Supplemental Restraint System control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Transmitting signals
A sensor unit integrated into the supplemental restraint system control unit detects the turn rate, along with the lateral and longitudinal acceleration of the vehicle.
Reading in of signals
Signals are read in via the following connections:
- Direct line
- Seat occupied recognition LIN (LIN E2)
- User interface CAN (CAN HMI)
Direct line
The signals from the following sensors are read in via direct lines:
- Left sidebag sensor (A53)
- Right sidebag sensor (A54)
- Front passenger seat occupancy recognition (B41/1) (except CODE U10 (Automatic front passenger airbag shutoff))
- Left frontal acceleration sensor (B48/1)
- Right frontal acceleration sensor (B48/2)
- Left front door pressure sensor (B48/7)
- Right front door pressure sensor (B48/8)
- Left rear door pressure sensor (B48/9) (with CODE 293 (Sidebags in rear))
- Right rear door pressure sensor (B48/10) (with CODE 293 (Sidebags in rear))
- Left front bumper pedestrian protection sensor (B151/1) (with CODE U60 (Active engine hood (pedestrian protection)))
- Right front bumper pedestrian protection sensor (B151/3) (with CODE U60 (Active engine hood (pedestrian protection)))
- Driver seat belt buckle switch (S68/3)
- Front passenger seat belt buckle switch (S68/4)
- Driver seat position detection switch (S68/19) (with CODE 494 (USA version) or CODE 460 (Canada version))
- Front passenger seat position detection switch (S68/20) (with CODE 494 (USA version) or CODE 460 (Canada version))
Seat occupied recognition LIN
The Weight Sensing System (WSS) control unit (N110) (with code U10 (Automatic front passenger airbag shutoff) sends the status of the seat occupancy recognition via the seat occupancy LIN to the supplemental restraint system control unit.
User interface CAN
The following signals are read in via the user interface CAN among other things:
- Status of left rear seat belt buckle switch (S68/11)
- Status of right rear seat belt buckle switch (S68/12)
- Status of collision recognition (with code 239 (DISTRONIC PLUS), code 258 (COLLISION PREVENTION ASSIST) or code 23P (Driving Assistance Package))
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
The following components are actuated via direct lines:
- Pyrofuse (F63) (M256 or M264 with code B01 (48V technology))
- Driver emergency tensioning retractor squib (R12/1)
- Front passenger emergency tensioning retractor squib (R12/2)
- Front passenger airbag squib 1 (R12/4)
- Front passenger airbag squib 2 (R12/5) (with code 460 (Canada version) or code 494 (USA version))
- Left rear emergency tensioning retractor squib (R12/6)
- Right rear emergency tensioning retractor squib (R12/7)
- Driver sidebag squib (R12/9)
- Front passenger sidebag squib (R12/10)
- Sidebag squib in left rear (R12/11) (with CODE 293 (sidebags in rear))
- Sidebag squib in right rear (R12/12) (with CODE 293 (sidebags in rear))
- Driver airbag squib 1 (R12/13)
- Driver airbag squib 2 (R12/14)
- Left windowbag squib (R12/22)
- Right windowbag squib (R12/23)
- Driver kneebag squib (R12/25)
- Front passenger belt force limiter (R12/26) (with code 460 (Canada version) or code 494 (USA version) or code 498 (Japan version))
- Driver belt force limiter (R12/27) (with code 460 (Canada version) or code 494 (USA version) or code 498 (Japan version))
- Driver seat belt end-fitting tensioner squib (R12/37) (with code 494 (USA version) or code 460 (Canada version))
- Front passenger seat belt end-fitting tensioner squib (R12/38) (with code 494 (USA version) or code 460 (Canada version))
- Front passenger airbag bleed valve squib (R12/44) (with code 460 (Canada version) or code 494 (USA version))
- Left active engine hood squib (R12/49) (with CODE U60 (Active engine hood (pedestrian protection)))
- Right active engine hood squib (R12/50) (with CODE U60 (Active engine hood (pedestrian protection)))
- Driver seat side PRE-SAFE® pulse squib (R12/65) (with code 292 (PRE-SAFE® pulse side))
- Front passenger seat side PRE-SAFE® pulse squib (R12/66) (with code 292 (PRE-SAFE® pulse side))
- Inerting system squib (R12/69) (with code 2U8 (Alternative refrigerant) and gasoline engine)
- Analog crash output to CDI control unit (N3/9) (diesel engine) or ME-SFI [ME] control unit (N3/10) (gasoline engine)
- Analog crash output to front SAM control unit (N10/6)
Transmitting signals
The signals are transmitted via the following connections:
User interface CAN
User interface CAN
The following signals are sent via the user interface CAN among other things:
- Crash signal
- Display fault message request
- Status of driver seat belt buckle switch
- Status of front passenger seat belt buckle switch
| Wiring diagram for Supplemental Restraint System control unit | PE91.60-P-2106-97XBA |