Operation sps SRS (Supplementary restraint system)

OPERATION SPS SRS

In the event of a frontal impact, when the airbag The airbag supplementary restraint system (SRS) is a diagnostic control unit senses the impact, the safety device which, when used in conjunction with diagnostic control unit fires igniters. This in turn ignites the seat belt, is designed to protect the driver and tablets of sodium azide which generate a large front passenger. amount of Nitrogen gas leading to airbag inflation in approximately 30 milli-seconds. Two different SRS systems are fitted to Discovery. The Distributed SRS which has two crash sensors All Models located in the engine compartment on the chassis longitudinals and the Single Point Sensing (SPS) SRS When fully deployed the airbag offers additional which has a single crash sensor located in the Airbag protection to the front seat occupant. As an occupant diagnostic control unit. moves into the airbag it immediately discharges the gas to provide progressive occupant deceleration and The change from distributed SRS to SPS SRS reduce risk of injuries. The whole process is occurred at VINs 198222 and 528977. completed in approximately 0.3 seconds.

deployed.

Distributed SRS

In the event of a frontal impact, when the airbag diagnostic control unit and one of the airbag crash sensors senses the impact, the diagnostic control unit fires igniters. This in turn ignites tablets of sodium azide which generate a large amount of Nitrogen gas leading to airbag inflation in approximately 30 milli-seconds.

• WARNING: All the airbag system
• components, including the wiring harness,
• MUST be renewed after the airbags have