Circuit/System Description

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The inflatable restraint Passenger Presence System (PPS) has several flexible conductive metal strips placed underneath the seat cushion trim. These sensor strips transmit and receive a low-level electric field. If the seat is saturated with liquid, the PPS will detect a low resistance value between these sensor strips. If this occurs, allow seat to dry and check if fault returns. If the PPS determines there is a wet seat condition the PPS will communicate to the sensing and diagnostic module (SDM) through a non class 2 communications circuit that a PPS fault is present. When the PPS detects this DTC within the PPS it will notify the customer of the enable/disable status by turning on the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators, then the PPS will communicate to the SDM that a PPS fault is present. The SDM will then turn the AIR BAG indicator ON and set DTC B0092 indicating a problem within the PPS and will suppress the deployment of the instrument panel (I/P) module. In some conditions DTC 056 will set along with DTC 034. The wet seat fault should be diagnosed first.