Component description for supplemental restraint system control unit - GF91.60-P-4068CE

MODEL 204.0 /2 as of model year 2009 /YoM 08 

MODEL 204.3 

MODEL 204.9 

Shown on model 204.0 

Location 

The supplemental restraint system control unit is located on the center tunnel.

Task 

The supplemental restraint system control unit has the following tasks:

• Reading in of sensors and signals 
• Evaluation of input factors 
• Actuating components 

Reading in of sensors and signals 

The input factors are read in via the following connections:

• Direct line 
• Chassis CAN (CAN E) 
• Seat occupied LIN (LIN E2) (on model 204.0/2 as of 1.3.11, model 204.9 as of 1.6.11) 

Direct line 

The signals from the following components are read via a direct line:

• Engine hood switch pedestrian protection + ATA Hall sensor (A38/1) (with code (U60) Pedestrian protection)
• Left sidebag sensor (A53)
• Right sidebag sensor (A54)
• Front passenger seat occupied recognition (B41/1) (on model 204.0/2 up to 28.2.11, model 204.9 up to 31.5.11, model 204.3 without code (U18) Automatic child seat recognition (ACSR [AKSE]) and without code (U10) Front passenger seat with weight sensing)
• Front passenger seat occupied recognition and ACSR [AKSE] (B48)

  (on model 204.0/2 up to 28.2.11, model 204.9 up to 31.5.11, model 204.3 with code (U18) Automatic child seat recognition (ACSR [AKSE]))

• 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) (On model 204.0/2/9 with code (293) Left and right rear sidebag)
• Right rear door pressure sensor (B48/10) (On model 204.0/2/9 with code (293) Left and right rear sidebag)
• Pedestrian protection Hall sensor (B100) (with code (U60) Pedestrian protection)
• Left front bumper pedestrian protection sensor (B151/1) (with code (U60) Pedestrian protection)
• Center front bumper pedestrian protection sensor (B151/2) (with code (U60) Pedestrian protection)
• Right front bumper pedestrian protection sensor (B151/3) (with code (U60) Pedestrian protection)
• Driver seat belt buckle restraint system switch (S68/3)
• Front passenger seat belt buckle restraint system switch (S68/4)

Chassis CAN 

The following signal is read in over the chassis CAN on model 204.0 up to 28.2.11, model 204.9 up to 31.5.11, model 204.3 with code (U10) Front passenger seat with weight sensing:

• Status of seat occupied recognition from weight sensing system (WSS) control unit (N110) (provided by front SAM control unit with fuse and relay module (N10/1))

Seat occupied LIN (on model 204.0/2 as of 1.3.11, model 204.9 as of 1.6.11) 

The signals from the following components are read in over the seat occupied LIN:

• Front passenger seat occupied recognition (without code (U18) Automatic child seat recognition (ACSR [AKSE]) and without code (U10) Front passenger seat with weight sensing)
• Front passenger seat and ACSR occupied recognition (with code (U18) Automatic child seat recognition (ACSR))
• Weight Sensing System (WSS) control unit (N2/13) (on model 204.0/9 with code (U10) Front passenger seat with weight sensing)

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 actuation of the components takes place via the following connections:

• Direct line 
• Chassis CAN 

Direct line 

The following components are actuated via a direct line:

• Pyrofuse 88 (F32f88) (without code (B03) ECO start/stop function)
• Pyrofuse (F63) (with code (B03) ECO start/stop function)
• Driver ETR squib (R12/1)
• Passenger ETR 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 (293) Left and right rear sidebag)
• Right rear sidebag squib (R12/12) (with code (293) Left and right rear sidebag)
• 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) (with code (294) Kneebag)
• Driver pelvis airbag squib (R12/41) (with code (291) PELVIS AIRBAG (PELVISBAG))
• Front passenger pelvis airbag squib (R12/42) (with code (291) PELVIS AIRBAG (PELVISBAG))
• Driver seat NECK-PRO head restraint solenoid (Y24/12)
• Front passenger seat NECK-PRO head restraint solenoid (Y24/13)
• Left rear engine hood lifter (Y127/1) (with code (U60) Pedestrian protection)
• Right rear engine hood lifter (Y127/2) (with code (U60) Pedestrian protection)
• Analog crash output to the CDI control unit (N3/9) (for diesel engine) or to the ME-SFI [ME] control unit (N3/10) (for gasoline engine)

Chassis CAN 

The signals are transmitted by the supplemental restraint system via the chassis CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

	Wiring diagram for airbag control unit	Sheet 1	PE91.60-P-2105-97FAA
		Sheet 2	PE91.60-P-2105-97FAB