Seat Position Sensor (SPS)

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The inflatable restraint seat position sensor (SPS) is used to determine the proximity of a front passenger seat position with respect to the inflatable restraint I/P module. The SPS is a hall effect sensor that is mounted on the seat track of the front passenger seat. The SPS is connected to the sensing and diagnostic module (SDM) with a low reference and a signal circuit. The SDM uses the state of the SPS to determine the need for a stage 2 deployment of the inflatable restraint I/P module. When the seat is in the forward position, stage 2 deployment is disabled. When the seat is in the rearward position, stage 2 deployment is enabled. The SDM monitors the passenger seat position switch signal circuit and if a fault is detected, the SDM will set a DTC and default to disabling stage 2 inflatable restraint I/P module deployment.