Safety Belt Sensors

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.

The buckle of each front safety belt incorporates a Hall effect sensor that provides a safety belt status signal to the restraints control module (RCM). When a safety belt is unfastened the sensor outputs a low current to the restraints control module (RCM). When the safety belt is fastened the switch outputs a high current to the restraints control module (RCM).

The restraints control module (RCM) broadcasts the status of the two front safety belts on the high speed controller area network (CAN) bus for use by the instrument cluster. In the event of a front impact the restraints control module (RCM) will deploy the pretensioners provided the safety belt buckles are fastened. The pretensioners have a lower deployment threshold than that required by the air bags. Hence it is possible during a minor collision, which exceeds the deployment threshold, that only the pretensioners will deploy. Refer to Safety Belt System information.