Circuit/System Description

The passenger presence system (PPS) is used to monitor the pressure profile of any occupant that is sitting in the front passenger seat and communicates the profile classification to the sensing and diagnostic module (SDM). The SDM will either enable or suppress the deployment of the passenger instrument panel air bag based on the profile classification of the occupant. If the PPS module has been replaced a preload test must be run on the serviced seat before that vehicle is released back to the customer. When a new PPS module is installed a DTC will set indicating that a preload test needs to be preformed. If the PPS module detects any preload DTC, the PPS module will communicate to the SDM through a dedicated serial data circuit that a PPS fault is present. The SDM will set DTC B0081 indicating a problem within the PPS, suppress deployment of the passenger instrument panel air bag, and illuminate the AIR BAG indicator.