GF91.60-P-2001G Deploy Supplemental Restraint System, Function
GF91.60-P-2001G Deploy Supplemental Restraint System, Function
MODEL 463.306 /336 /346 up to 31.5.12 as of model year 2011 /YoM 10
MODEL 463.202 /222 /236 /237 up to 31.5.12 as of model year 2009 /YoM 08
MODEL 463.247 /248 /249 /254 /270 /271 /303 /340 /341 up to 31.5.12 as of model year 2007
1 Circuit status
2 Airbag indicator and warning lamp, actuation
3 Belt buckle signal
4 Monitor restraint system
5 Actuate restraint device
6 Seat belt buckle status
7 Unlock doors
8 Automatic child seat recognition airbag OFF indicator lamp, actuation
9 Seat belt warning buzzer
10 Switch off engine
11 Impact detection
12 Seat occupied recognition status
A1 Instrument cluster
A53/1 Left sidebag and windowbag sensor (in model 463.236/237/248/249/270/271/341/346)
A54/1 Right sidebag and windowbag sensor (in model 463.236/237/248/249/270/271/341/346)
B48 Front passenger seat occupied and child seat recognition sensor
M14/5 Right front door CL [ZV] motor
M14/6 Left front door CL [ZV] motor
M14/8 Left rear door central locking motor (in model 463.236/237/248/ 249/270/271/341/346)
M14/9 Right rear door central locking motor (in model 463.236/237/248/ 249/270/271/341/346)
N2/7 Restraint systems control unit
N3/9 CDI control unit (with diesel engine)
N3/10 ME-SFI [ME] control unit (with gasoline engine)
N10/1 Front signal acquisition and actuation module (SAM)
N10/2 Rear signal acquisition and actuation module (SAM)
N69/1 Door control module front left
N69/2 Door control module front right
N69/3 Left rear door control unit (in model 463.236/237/248/249/270/271/341/346)
N69/4 Right rear door control unit (in model 463.236/237/248/249/270/271/341/346)
N72/1 Upper control panel control unit
N72/1e1 Automatic child seat recognition airbag OFF indicator lamp
N73 EZS control unit
R12/1 Driver ETR [GUS] squib
R12/2 Front passenger ETR [GUS] squib
R12/4 Front passenger airbag squib 1
R12/6 Left rear ETR squib
R12/7 Right rear ETR squib
R12/13 Driver airbag ignition squib 1
R12/14 Driver airbag ignition squib 2
R12/16 Windowbag squib, left (in model 463.236/237/248/249/270/271/341/346)
R12/17 Windowbag squib, right in model 463.236/237/248/249/270/271/341/346)
S68/3 Left front seat belt buckle restraint systems switch
S68/4 Right front seat belt buckle restraint systems switch
B Interior CAN (CAN B)
Crash-active NECK-PRO head restraint, as of 1.9.10 in model 463.202/222/236/237/270/271/303/306/336/340/341/346
13 NECK-PRO head restraint solenoid, actuation
N139 NECK-PRO head restraint triggering device
Y24/12 Driver NECK-PRO head restraint solenoid
Y24/13 Front passenger NECK-PRO head restraint solenoid
Function requirements
^ Circuit 15 ON
^ Circuit 15R ON
^ Supplemental restraint system (SRS) operational
General information
The SRS is continuously monitoring the occupation status of the front passenger seat, the status of the front seat belts (buckled or not buckled) and adjusts its deployment behavior with the help of this information. The automatic child seat recognition airbag OFF indicator lamp in the upper control panel control unit and the airbag indicator and warning lamp (A1e15) in the instrument cluster are used to notify the driver of the status of the SRS.
Front passenger seat occupation status
The restraint systems control unit receives the corresponding information from the front passenger seat occupied and child seat recognition sensor.
Front seat belt status
The left front seat belt buckle restraint systems switch or the right front seat belt buckle restraint systems switch is operated by inserting the belt latch into the belt buckle. This is read in directly by the restraint systems control unit.
The status of the rear seat belts does not have any influence on the deployment behavior of the SRS.
Impact detection
The restraint systems control unit determines the acceleration acting on the vehicle with the aid of its integrated sensors and the following sensors:
^ Left sidebag and windowbag sensor
^ Right sidebag and windowbag sensor
With the aid of this sensor system, the SRS is able to distinguish between the following types of impacts:
^ Head-on collision
^ Side impact (only model 463.236/237/248/249/270/271/341/346)
^ Rear end collision
Function sequence for frontal impact
A frontal impact is detected by the restraint systems control unit via the integrated sensors.
The restraint equipment is deployed depending on the severity of the impact, the occupation of the front passenger seat, and the status of the front seat belts.
The following squibs can be ignited:
^ Driver ETR [GUS] squib
^ Front passenger ETR [GUS] squib
^ Front passenger airbag squib 1
^ Left rear ETR squib
^ Right rear ETR squib
^ Driver airbag ignition squib 1
^ Driver airbag ignition squib 2
The following situations are taken into account:
^ Occupation status of front passenger seat:
The restraint systems control unit uses the current occupation to decide whether to suppress or deploy the front passenger airbag unit.
^ Driver belt buckle status:
If the left front seat belt buckle restraint systems switch detects that a belt latch is not inserted into the belt buckle, then the driver airbag unit with advanced ignition timing is triggered instead of the driver emergency tensioning retractor unit.
^ Front passenger belt buckle status:
If the right front seat belt buckle restraint systems switch detects that a belt latch is not inserted into the belt buckle, then the front passenger airbag unit with advanced ignition timing is triggered instead of the front passenger emergency tensioning retractor unit.
This only applies, however, if the front passenger seat is known to be occupied. If not occupied then neither the emergency tensioning retractor nor the front passenger airbag unit are triggered.
Function sequence for side impact
A side impact is detected by the restraint systems control unit via the integrated sensors and the following sensors:
^ Left sidebag and windowbag sensor
^ Right sidebag and windowbag sensor
The following squibs can be ignited:
^ Left windowbag squib
^ Right windowbag squib
Function sequence for rear end collision
A rear end collision is detected by the restraint systems control unit via the integrated sensors.
In vehicles as of 1.9.10, a rear-end collision is also recognized by the NECK-PRO head restraint triggering device.
The activation of the restraint equipment takes place depending on the severity of the impact and the status of the front seat belts.
The following squibs can be ignited:
^ Driver ETR [GUS] squib
^ Front passenger ETR [GUS] squib
^ Left rear ETR squib
^ Right rear ETR squib
The NECK-PRO head restraint triggering device actuates the following components:
^ Driver NECK-PRO head restraint solenoid
^ Front passenger NECK-PRO head restraint solenoid
The solenoids release the NECK-PRO head restraints in the event of a rear-end collision. Using a pre-compressed spring, the impact plate of the NECK-PRO head restraint moves forward and at the same time upward, whereby the distance between the head and the head restraint is reduced and the potential for injury in the area of the cervical vertebrae is thus decreased.
The following situations are taken into account:
^ Driver belt buckle status:
If the left front seat belt buckle restraint systems switch detects that a belt latch is not inserted into the belt buckle, the driver emergency tensioning retractor unit is not activated.
^ Front passenger belt buckle status:
If the right front seat belt buckle restraint systems switch detects that a belt latch is not inserted into the belt buckle, the front passenger emergency tensioning retractor unit is not activated.
In addition to deploying the corresponding restraint equipment, the restraint systems control unit initiates the following interventions:
^ Switching off the engine
The restraint systems control unit transmits a discrete signal to the CDI control unit or the ME-SFI [ME] control unit, which then switches off the engine.
^ Unlocking the door locks
The restraint systems control unit transmits a discrete signal for unlocking the door locks to the rear SAM. At the same time, a crash sensor is integrated in the rear SAM for this purpose. In the event of negative vehicle acceleration of more than a = 10 g, the rear SAM triggers unlocking of the door locks.
^ Activation of the hazard warning function
The restraint systems control unit transmits a discrete signal to the rear SAM, which switches on the hazard warning system.
