If the light is on permanently, there can be several reasons for this. Most often it turns out that there is not a pillow slot (either collapsed or forgot to insert it). The connector is located on the instrument panel where the airbag test is shown and the unbuttoned men' s are shown.
In addition, there are cases where the fault of the manufacturer was caused by the failure of the manufacturer: forgot to insert the lamp power. The error that the system issued meant a failure of the signal lamp in the panel.