CTS-V V8-6.0L VIN U (2006)
Air Bag: Description and Operation
Inflatable Restraint Passenger Presence System
INFLATABLE RESTRAINT PASSENGER PRESENCE SYSTEM
The passenger presence system (PPS) is used to monitor the pressure profile 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 I/P module. The PPS consist of an electronic
control module and sensor mat assembly attach to the bottom seat cushion, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The PPS
measures the weight of the occupant sitting in the front passenger seat as a pressure change. If the pressure from the occupant's weight is less than a
specified value, the PPS module will send a suppress signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher
than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P module. 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 on the rearview mirror. The PPS monitors itself for
faults and will set diagnostic trouble codes (DTC's) if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by
requesting the instrument panel cluster (IPC) to turn the AIR BAG indicator ON.
IMPORTANT: The passenger presence system (PPS) and the seat bottom foam cushion is a calibrated unit and cannot be service separately. After
repairing or replacing the PPS, the system must be checked for preload in order to function properly.
