Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC 024
PPS Ignition 1 Voltage Performance
Circuit/System Description
The inflatable restraint passenger presence system (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) module. The PPS consist of an electronic control module, silicone filled sensor pad,
pressure sensor, seat belt tension retractor sensor, wiring harness and PASSENGER AIR BAG
ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam
cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant
sitting in the front passenger seat is measured as a pressure change within the bladder by the
pressure sensor. The pressure sensor sends a voltage signal to the PPS module. 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 occupants 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 instrument panel. The PPS
monitors itself for faults and will set flash DTCs if a fault is detected. The PPS will also notify
the SDM of a fault. The SDM will respond by setting either DTC B0092 or B0098 and
requesting the instrument panel cluster (IPC) to turn the AIR BAG indicator ON.
Conditions for Running the DTC
Ignition 1 voltage is within the normal operating voltage range.
Conditions for Setting the DTC
The PPS detects ignition 1 voltage is less than 8 volts for 500 milliseconds.
Action Taken When the DTC Sets
The SDM disables the instrument panel (I/P) module deployment loop.
The SDM commands the AIR BAG indicator ON via class 2 serial data.
Conditions for Clearing the DTC
2007 Hummer H3
2007 RESTRAINTS Supplemental Inflatable Restraints - H3