Passenger Presence System

INFLATABLE RESTRAINT PASSENGER PRESENCE SYSTEM

IMPORTANT: The passenger presence system (PPS), is a calibrated unit. After removal or installation of the seat, installation of any seat accessories or replacement of a PPS component, the system must be rezeroed in order to function properly.

The PPS is used to monitor the weight of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) inflator module, side impact module and seat belt pretensioner. The PPS consist of an electronic control module (ECM), 4 sensors, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The sensors are installed on brackets connecting the seat rail to the seat frame. The weight of the occupant sitting in the front passenger seat is measured as a change in current flow within the sensors. If the sensor determines that the occupants weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the instrument panel module (IPM), side impact module and seat belt pretensioner. If the sensor determines the occupants weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the IPM, side impact module and seat belt pretensioner. The PPS module will notify the customer of the enable/disable status by turning on one of the PASSENGER AIR BAG ON/OFF indicators located in the center of the I/P. The PPS monitors itself for faults and will turn the PASSENGER AIR BAG ON/OFF indicator OFF and store DTCs when a fault is detected. The PPS will also notify the SDM of a fault and the SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator located on the IPC ON.