Belt Tension Sensor (BTS): Notes

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

The Belt Tension Sensor (BTS):

is a 3-wire Hall-effect sensor located at the safety belt anchor point and is part of the front passenger safety belt and retractor assembly.
is used in conjunction with the OCS.

The BTS is used by the OCS to identify the presence of a child safety seat on the front passenger seat. The BTS senses the tension on the safety belt assembly then provides an output to the OCSM, indicating that the safety belt assembly is cinched. After sensing the weight applied to the seat by the occupant and using the BTS input, the OCSM determines how the occupant should be classified and communicates the information to the RCM. If the occupant is classified as a child, the RCM then automatically deactivates the passenger air bag module and illuminates the PAD indicator.