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DIAGNOSTIC MANUAL
SUPPLEMENTARY RESTRAINT SYSTEM
The SRS is designed to provide protection for the driver and front passenger in addition to the primary
safety protection provided by the seat belts and seat belt pretensioners.
The SRS system consists of :
1. SRS control module located on the floor assembly near centre console
2. Driver air bag module located in the centre of the steering wheel
3. Passenger air bag module located above the glove box compartment
4. Two thorax air bag modules located one each in driver and passenger seats
5. Two curtain airbag modules located one each in across both side A and B pillars
6. Two side satellite sensors located one each on both sides of the B pillar bottom
7. Two seat belt pretensioners located one each on RH &LH B pillars
The airbag locations can be identified by 'SRS AIR BAG' embossed on the air bag module cover.The
deployment of airbag depends upon the severity and direction of the frontal/side collision. This is done by
the rapid inflation of a cushion by non-toxic gas that is generated and/or released by an inflator in
response to an electrical signal from a collision detecting sensor inside the SRS control unit for frontal
collision or two side satellite sensors located one each on both sides of the B pillar. The inflated cushion
helps to absorb the energy of the driver or passenger and prevent body contact with the vehicle structure.
The seat belt pretensioner unit removes the slack in the seat belts to avoid the passenger/driver from
slipping through below the belt.
When frontal crash occurs, sensor in the SRS ECU detects the vehicle deceleration and sends an electrical
signal and based on that the SRS ECU decides whether to deploy the airbag or not. An electrically
activated initiator initiates a chemical reaction that creates gases to fill the airbag. The inflator produces
mostly nitrogen gas.
When side crash occurs, the side satellite sensors detects the impact and sends an electrical signal and
based on that the SRS ECU decides whether to deploy the airbag or not. An electrically activated initiator
initiates a chemical reaction that creates gases to fill the airbag. The inflator produces mostly nitrogen gas
During an frontal impact , both the driver and passenger airbags will get deployed along with their
respective pretensioners.
During an side impact, the thorax and curtain airbags on the side which impact happened will
deploy along with the pretensioners on both the sides
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present document,
are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra & Mahindra Ltd.,
will amount to unauthorized use and shall be liable for penalty/prosecution© 2011 Mahindra & Mahindra Ltd.
SRS
(SRS ) OVERVIEW
MAN-00156
OCT 2011/Rev 1
4
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