Head-On Collision - Function - GF91.60-P-2006PMA

MODELS 203.0 /2 as of 1.6.04, 203.7 as of 24.4.04 with CODE (494a) USA version

Behavior of the buckle emergency tensioning retractors if a moderately severe head-on collision occurs

Fig 1: Behavior Of The Buckle Emergency Tensioning Retractors - Severe Head-On Collision - Models 203.0 /2 As Of 1.6.04, 203.7 As Of 24.4.04 With Code (494A)

Behavior or driver airbag and buckle emergency tensioning retractor if a severe head-on collision occurs

Fig 2: Behavior Or Driver Airbag And Buckle Emergency Tensioning Retractor - Severe Head-On Collision - Models 203.0 /2 As Of 1.6.04, 203.7 As Of 24.4.04 With Code (494A)

Moderately severe head-on collision

If a moderately severe head-on collision occurs, the restraint systems control unit (N2/7) registers moderate deceleration via the signals of the driver-side frontal acceleration sensor (B48/1) and the passenger side frontal acceleration sensor (B48/2) sent via a discrete line. In this type of impact the restraining function of the seat belts in combination with the buckle emergency tensioning retractors ensure the maximum degree of passenger safety.

The restraint systems control unit (N2/7) therefore sends an ignition pulse to:

Driver ETR squib (R12/1)
Front passenger ETR squib (R12/2) (depending on seat occupancy)
Left rear ETR squib (R12/6)
Right rear ETR squib (R12/7)

Severe head-on collision

If a severe head-on collision occurs, the restraint systems control unit (N2/7) registers severe deceleration via the signals of the driver-side frontal acceleration sensor (B48/1) and the passenger-side frontal acceleration sensor (B48/2) sent via a discrete line. In this type of impact the airbag and seat belt system restraining functions in combination with the emergency tensioning retractors ensure the best possible degree of passenger safety. The restraint systems control unit (N2/7) therefore sends an ignition pulse to:

Driver airbag squib 1 (R12/13)
Front passenger airbag squib 1 (R12/4) (depending on seat occupancy)
Driver ETR squib (R12/1)
Front passenger ETR squib (R12/2) (depending on seat occupancy)
Left rear ETR squib (R12/6)
Right rear ETR squib (R12/7)

If also necessary because of the severity of the accident:

Driver airbag squib 2 (R12/14)
Front passenger airbag squib 2 (R12/5)

If the WSS (Weight Sensing System) control unit (N2/13) detects that the front passenger seat is unoccupied or occupied by a child seat, the front passenger airbag is not triggered in principle.

If the driver seat belt buckle restraint systems switch (S68/3) or the front passenger seat belt buckle restraint systems switch (S68/4) detects that a seat belt has not been fastened, the driver or front passenger airbags are triggered instead of the relevant emergency tensioning retractor at a brought-forward point in time.

	Front seat belt tensioner, location/task/design/ function		GF91.40-P-4000PP
	Rear Emergency Tensioning Retractors, location/task/design/function		GF91.40-P-4001PP
	Supplemental restraint systems control unit, location/task/design		GF91.60-P-4018PM
	Driver's Airbag, location/task/design/function		GF91.60-P-4001PP
	Front passenger airbag, location/task/design/ function		GF91.60-P-4003PP
	SRS airbag malfunction indicator lamp, location/task		GF91.60-P-4011PM
	Airbag OFF indicator lamp, location/task		GF91.60-P-4012PMA
	Seat Belt Buckle Switch, location/task		GF91.60-P-4013PP
	Driver-side /front passenger frontal acceleration sensors, location/task		GF91.60-P-4020PM
	WSS control unit, location/task		GF91.60-P-4105PM
	Pressure sensor, location/task		GF91.60-P-4106PM
	Seat belt tension sensor, location/task		GF91.60-P-4107PM