Front Impact Sensor (Certain Markets And Models Only)

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Locating Front Impact Sensors

Courtesy of VOLVO CARS CORPORATION

The frontal impact sensors are used to provide the supplemental restraint system module (SRS) with advance information about the collision pulse. This enables the control module to determine more accurately the components to be activated.

The frontal impact sensors have integrated logic which transmits acceleration data to the supplemental restraint system module (SRS).

The front impact sensors transmit continuous signals to the control module to indicate that they are working. In the event of a fault in a frontal impact sensor, a fault signal is transmitted to the control module which then stores a diagnostic trouble code (DTC). A diagnostic trouble code (DTC) is also stored if the communication between the control module and one of the frontal impact sensors does not function. Each frontal impact sensor has a software ID. The ID is used to check that the correct frontal impact sensor is installed.

Data is transmitted on the same cable used for power supply.

The two frontal impact sensors are inside the left and right-hand headlamps.