Block Diagram Airbag Control Module (ACM)

The ACM controls the deployment of the airbags and seat belt pretensioners, and is connected to the crash sensors fitted to the body frame.1

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BCM: Body Control Module

Gateway: The gateway controls data interaction between the vehicle networks. It routes between CAN, LIN and other networks.

VCU: Vehicle control unit

IPC: Instrument panel cluster

MHU: Multimedia head unit

BMS: Battery management system

Seat belt load limiters 

The force exerted by the pretensioner can cause injuries to the chest and shoulder area. For this reason, seat belt load limiters are installed. When a certain force is applied to the belt, e.g. in the automatic retractor, a torsion bar is twisted, and this limits the belt force to a maximum value.

• Is activated after the pretensioners have been deployed and the seat belt is locked.
• Reduces the load/force on the person's shoulder and chest caused by the seatbelt during a frontal accident.
• Comes into affect after the pretensioner has been activated, and before the occupant comes into contact with the airbag.

Operation: 

Seat belt warning indicator

Driver seatbelt status:

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The seat warning sign will illuminate if the driver starts driving the vehicle without fastening the seat belt and vehicle's speed is greater than 15 km/h. Along with a warning indicator, a warning card pops up and the seat occupancy detection indicator will turn red in the IPC area on the infotainment touch screen. If the driver fastens the seat belt after receiving the warning, the warning sign disappears and the seat occupancy detection indicator turns green. After 4 seconds, the seat occupancy detection indicator turns gray, and after 30 seconds the indicator disappears. If the warning is ignored, the vehicle will sound a chime for 30 seconds.

Driver seatbelt status:

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1. Tap on the warning card or the seat belt warning icon

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2. "Vehicle Status" window opens with "Alerts" tab active.
3. The alerts tab shows occupied seats with their respective seat belt status.

To check seat belt status (no warning present):

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1. Tap on "Service" icon from the home screen.

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2. To check the seat belt status of all vehicle occupants, tap on "Seat Belt" tab under Vehicle Health window.