Shown on model 205 |
N2/10 | Supplemental restraint system control unit |
P91.60-4470-05
Location
The Supplemental Restraint System control unit is located on the transmission tunnel.
Task
The Supplemental Restraint System control unit has the following tasks:
Reading in of sensors and signals
Evaluation of input factors
Actuation of components
Transmitting signals
A sensor unit is integrated into the supplemental restraint system control unit that detects the turn rate as well as the lateral and longitudinal acceleration of the vehicle.
Reading in of sensors and signals
The input factors 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) (model 205.0/1/2, 253 with CODE 298 (Sidebag in rear including belt force limiter))
Right rear door pressure sensor (B48/10) (model 205.0/1/2, 253 with CODE 298 (Sidebag in rear including belt force limiter))
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 status of the seat occupied recognition is sent by the weight sensing system (WSS) control unit (N110) (with CODE U10 (Automatic front passenger airbag shutoff)) 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 center rear belt buckle switch (S68/14) (model 205.0/1/2, 253)
Status of collision recognition (with CODE 23P (Driving assistance package))
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
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) (model 205.012/013/047/147/212/213/247, 253.354/954/992)
Pyrotechnical separator (K88) (model 205.012/013/047/147/212/213/247, 253.354/954)
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)
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)
Left rear sidebag squib (R12/11) (with CODE 298 (Rear sidebag including belt force limiter))
Right rear sidebag squib (R12/12) (with CODE 298 (Rear sidebag including belt force limiter))
Driver airbag squib 1 (R12/13)
Driver airbag squib 2 (R12/14)
Left windowbag squib (R12/22) (model 205.0/1/2/3, 253)
Right windowbag squib (R12/23) (model 205.0/1/2/3, 253)
Front passenger kneebag squib (R12/24) (model 205.3/4 with CODE 494 (USA version) or CODE 460 (Canada version))
Driver kneebag squib (R12/25)
Front passenger belt force limiter (R12/26) (with CODE 494 (USA version) or CODE 460 (Canada version))
Driver belt force limiter (R12/27) (with CODE 494 (USA version) or CODE 460 (Canada version))
Driver anchor fitting tensioner squib (R12/37) (with CODE 494 (USA version) or CODE 460 (Canada version))
Front passenger anchor fitting tensioner squib (R12/38) (with CODE 494 (USA version) or CODE 460 (Canada version))
Left headbag squib (R12/39) (model 205.4)
Right headbag squib (R12/40) (model 205.4)
Front passenger airbag ventilation valve squib (R12/44) (with CODE 494 (USA version) or CODE 460 (Canada 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)))
Left roll bar squib (R12/61) (model 205.4)
Right roll bar squib (R12/62) (model 205.4)
Inerting system squib (R12/69) (with code 2U8 (Alternative refrigerant) and engine 177, 264, 274, 276)
Analog crash output to the CDI control unit (N3/9) (diesel engine) or to the ME-SFI [ME] control unit (N3/10) (gasoline engine)
Analog crash output to front SAM control unit (N10/6)
Electric steering lock control unit (N26/5) (transmission 716)
Transmitting signals
The signals are transmitted via the following connections:
Seat occupied recognition LIN
User interface CAN
Vehicle dynamics CAN (CAN H)
Seat occupied recognition LIN
The following signals, among others, are sent over the seat occupancy LIN:
Crash signal
Status of driver seat belt buckle switch
Status of front passenger seat belt buckle switch
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
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
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Vehicle dynamics CAN
The following signals, among others, are sent via the vehicle dynamics CAN:
Turn rate
Lateral acceleration
Longitudinal acceleration
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).