Frelander 2. Manual — part 619
Supplemental Restraint System - Air Bag and Safety Belt Pretensioner
Supplemental Restraint System (SRS)
Description and Operation
COMPONENT LOCATION SHEET 1 OF 2
Item
Part Number
Description
1
-
Passenger air bag
2
-
Adaptive steering column
3
-
Clockspring
4
-
Driver air bag
5
-
Driver lower air bag
6
-
Restraints Control Module (RCM)
7
-
Passenger air bag deactivation switch
COMPONENT LOCATION SHEET 2 OF 2
Item
Part Number
Description
1
-
Side air bag
2
-
Side air curtain
3
-
Driver seat position sensor
4
-
Side impact sensor – C-pillar
5
-
Side impact sensor - C-pillar
6
-
Side air bag
7
-
Side air curtain
8
-
Side impact sensor - B-pillar
9
-
Safety belt pretensioners
10
-
Impact sensor - front
11
-
Impact sensor - front
12
-
Side impact sensor - B-pillar
OVERVIEW
WARNING: All pyrotechnic devices are dangerous. Before performing any procedures on any pyrotechnic device, read
all information contained within the Standard Workshop Practices section of this manual.
For additional information, refer to:
Standard W orkshop Practices
(100-00 General Information, Description and Operation).
(100-00, Description and Operation).
The continued development of the Supplemental Restraint System (SRS) provides an improved overall level of crash
protection for vehicle occupants. The system analyzes the occupancy scenario and crash severity before activating the
appropriate safety devices to better protect a range of occupants in a variety of crash situations. Benefits of the system
include:
Optimization of the deployment restraint devices and the reduction in potential for air bag induced injuries.
The significant reduction in passenger air bag deployments; particularly when passenger seats are unoccupied.
There are seven separate air bags, each designed with a specific protection function:
Driver and front passenger air bags provide head and chest protection for front occupants.
Driver and front passenger side air bags provide protection against side impact.
Side air curtains provide protection against head impact and roll-over ejection for both front and rear occupants.
A driver lower air bag provides protection to the driver's legs from the steering column support structures.
In order to support the SRS requirements, restraint control architecture is used comprising the following systems or
components:
All electronic front and side crash sensing and advanced restraints management.
Driver air bag with twin stage inflator.
Passenger air bag with twin stage inflator.
Depending on market, a front passenger seat:
- occupant classification sensing system, or
- occupant detection sensing system.
Safety belt buckle pretensioners.
A seat position sensor on the driver seat.
Depending on market; a pyrotechnic actuator fitted to the steering column to provide increased energy absorption.
CONTROL DIAGRAM
• NOTE: A = Hardwired; D = High speed controller area network (CAN) bus.
Item
Part Number
Description
1
-
Drivers safety belt pretensioner
2
-
Passenger safety belt pretensioner
3
-
Instrument cluster
4
-
Engine Control Module (ECM)
5
-
Belt-minder sensor – market specific
6
-
Safety belt tension sensor – market specific
7
-
Battery
8
-
Occupancy sensor
9
-
Occupancy sensor module
10
-
Central Junction Box (CJB)
11
-
Restraints Control Module (RCM)
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