Electronic control unit installed under the floor tunnel lining

The ECU has built-in micromechanical sensors that measure the longitudinal and transverse acceleration of the car in a collision

The ECU evaluates the impact force by comparing the values it receives from the frontal impact sensor, side impact sensors and internal electronic sensors with the set value.

If the deceleration signal due to a frontal or side impact exceeds the set value, the ECU initiates the activation of the seat belt tensioners and the deployment of the corresponding airbags.

If the car's battery is broken during an accident, the electrical voltage retention circuit in the ECU will still be able to activate the airbags for some time from the moment of impact;

– frontal and lateral impact sensors that transmit acceleration information to the system control unit

The force and direction of impact in a traffic accident is determined by the electronic control unit of the passive safety system using impact sensors. Based on sensor signals, the control unit activates the airbags and front seat belt tensioners.

Frontal impact sensors are located on the spars of the car body behind the front bumper

Side impact sensors are installed on the central pillar of the body from the inside behind the linings of the racks;

Side impact sensors are installed on cars with side airbags and inflatable blinds in a variant version.

Replacement of the electronic control unit of the security system

Disconnect the wire from the negative terminal of the battery

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

Removing the lining of the tunnel floor, described in the article - How to remove the lining of the floor tunnels of the Hyundai Solaris car

We fold back the locking bracket and disconnect the pads of the wires of the passive safety control unit

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

Unscrew the three bolts securing the security control unit to the body

And remove the block

How to replace the sensors and the Hyundai Solaris security system unit

When installing the unit, pay attention to the arrow on the label. The arrow should be directed in the direction of movement of the car

Installing the safety unit and all the details in reverse order

Replacement of shock sensors

Disconnect the negative battery terminal

We are waiting for at least one minute to discharge the capacitors of the cushion actuation system

How to replace the sensors and the Hyundai Solaris safety system unit

We remove the lower part of the lining of the central pillar of the body

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

We squeeze the lock of the side impact sensor wire pads

Disconnect the pad from the sensor

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

Unscrew the sensor mounting bolt to the central pillar of the body and remove the sensor

Installing the sensor and others were done in reverse order

Replacing the frontal impact sensor

Disconnect the negative battery terminal

We are waiting for at least one minute to discharge the capacitors of the cushion actuation system

How to replace the sensors and the Hyundai Solaris safety system unit

Removing the front wing fender

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

We shift and squeeze the lock for fixing the pads of the wires of the frontal impact sensor

Disconnect the pad from the sensor

How to replace Hyundai Solaris sensors and security system unitHow to replace Hyundai Solaris sensors and security system unit

Unscrew the bolt fastening the frontal impact sensor

Removing the sensor

How to replace the sensors and the Hyundai Solaris security system unit

We install the frontal impact sensor and other parts in reverse order.