The supplementary restraint system (SRS) includes air bags, pre-tensioners, and other
safety-related components. The SRS contains components which could be potentially hazardous to
the technician if not serviced and handled correctly.
Warning: Always follow these precautions and the relevant Service Manual procedures
when servicing air bags and other SRS components. Only trained professionals should service the
SRS.
Warning: An undeployed air bag module or pre-tensioner contains sodium azide, which
is poisonous and extremely flammable. Contact with water, acid or heavy metals might produce
harmful or explosive compounds. Do not dismantle, incinerate or bring into contact with
electricity, before the unit has been deployed.
Warning: In the event of an air bag or
seat belt tensioner deployment, certain air bag and seat belt components must be replaced, and
other components must be inspected for damage. Refer to body
repair tech note BR-14-20-001 for a specific list of items that must be inspected and
replaced.
Warning: Do not expose an air bag module or seat belt pre-tensioner to heat exceeding
85°C.
These precautions are not restricted to operations performed when servicing the SRS; the same
care must be exercised when working on other systems and components located near the SRS
components:
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Steering system: Driver’s air bag, clockspring.
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Dash: Passenger's air bag, knee air bags.
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Interior trim: Passive Safety Restraint Control Module (PSRCM), Body Control Module
(BCM), front seat belt pre-tensioners, curtain air bags.
-
Electrical system: Pyrotechnic fuse, SRS harnesses, link leads, connectors.
SRS Harnesses and Connectors
Note: SRS wiring can be identified by a special yellow outer sleeve protecting the
wires (black with yellow stripe protective coverings are sometimes used).
Warning: Never attempt to modify, splice or repair SRS wiring.
Warning: Never install electronic equipment (such as a mobile telephone, two-way
radio or in-car entertainment system) in such a way that it could generate electrical
interference in the SRS harnesses. Seek specialist advice when installing such
equipment.
Warning: Always ensure that SRS wiring is routed correctly. Be careful to avoid
trapping or pinching the cables. Do not leave the connectors hanging loose or allow SRS
components to hang from their harnesses. Look for possible points of chafing.