Passive safety system (srs)

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Passive safety system (SRS) Ford Mondeo unites in a complex (depending on configuration) front and side airbags for the driver and passenger in the front seat, window airbags and front seat belt pretensioners. In all trim levels, cars are equipped with inertial diagonal seat belts.

WARNING: Airbags do not replace seat belts. Moreover, when the car is moving, the driver and front passenger must be sure to wear their seat belts, since in the event of a traffic accident, a deployed airbag itself can cause serious injury to a person who is not wearing a seat belt.


The SRS includes:



- the driver's airbag module, located in the steering wheel hub and consisting of a folded airbag shell and a domed gas generator;



– front passenger airbag module (installed depending on the vehicle), located in the instrument panel on the passenger side and consisting of a folded cushion shell and a tubular gas generator. It differs from the driver's airbag in shape and large volume;


WARNING: When installing a child seat in the front passenger seat, disable the passenger airbag (with a switch).




The switch is located in the upper right corner of the glove box. Airbag can be turned off by car key (the photo shows a variant of the glove box on a car with a non-deactivated airbag, which has a plug instead of a switch).

When the front passenger airbag is deactivated, the airbag deactivation warning light in the instrument cluster comes on;

– driver and front passenger side airbag modules (installed depending on the vehicle), located in the outer side parts of the front seat backs and consisting of a folded cushion shell and a gas generator;

– window cushion modules (set to order), located above the windows of the front and rear doors, under the upholstery of the ceiling, and consisting of a folded cushion shell and a gas generator;



- electronic control unit (ECU) with shock sensors (accelerometers), installed under the floor tunnel lining.


The ECU incorporates micro-mechanical sensors that measure the longitudinal and lateral acceleration/deceleration of the vehicle in the event of a collision. Based on the calculated value, the ECU evaluates the severity of the impact. The ECU compares the values it receives from the front impact sensor, side impact sensors and internal electronic sensors. If the deceleration signal due to frontal (or side) impact exceeds a predetermined value, the ECU initiates the deployment of the pretensioners and the deployment of the airbags.

If the vehicle's battery ruptured during the crash, the voltage holding circuit in the ECU would still be able to activate the airbags for some time after the impact;



- front seat belt pretensioners (mounted in the inertial coils of the front belts) with tension limiters.

Pretensioners provide a timely response to an emergency deceleration of the car, pulling the driver and passengers to the seat backs, exclude their further movement forward by inertia and injury from the deployed airbag;
NOTE: The seat belt pretensioner mechanism always deploys before the airbag.



– head restraints mounted on the backs of the driver's and front passenger's seats of cars of all trim levels and on the back of the rear seat. The head restraints prevent damage to the cervical vertebrae of occupants in the event of a severe rear impact or airbag deployment.

The front and rear seat head restraints can be adjusted in height by pressing the lock and moving the head restraint up or down to the required height;

NOTE: The best position for the head restraint is when its top edge is flush with the top of the head.


For very tall people, raise the head restraint to its highest position, for very short people, lower the head restraint to its lowest position.

– signal lamps of system of passive safety (SRS).

If the ECU detects a system problem, the airbag warning light will illuminate (with red filter).

WARNING: If the warning light comes on, contact a car service immediately. In addition to the possible failure in an emergency, the airbag may unexpectedly deploy while driving, leading to serious consequences.


Driver and front passenger seat belt warning light (with red filter) lights up when the vehicle speed exceeds 10 km/h and stays on for 5 minutes or until the seat belt is fastened. In addition, if the seat belt is not fastened, a warning buzzer will sound at the same time as the lamp.

The front passenger's airbag deactivation indicator lamp illuminates when the airbag is deactivated.







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