8D–244
WIRING SYSTEM
Supplemental Restraint System (SRS) – Air Bag
General Description
The circuit consists of Sensing and Diagnostic Module
(SDM), driver’s air bag assembly, SRS coil assembly,
passenger’s air bag assembly, and “AIR BAG” warning
light. SDM, SRS coil assembly (driver side only), driver air
bag assembly, passenger air bag assembly and
connector wire make up the deployment loops. The
function of the deployment loops is to supply current
through air bag assembly, which will cause deployment of
the air bags in the event of a frontal crash of sufficient
force, up to 30 degrees off the center line of the vehicle.
The air bag assemblies are only supplied enough current
to deploy when the SDM detects vehicle velocity changes
severe enough to warrant deployment.
The SDM contains a sensing device which converts
vehicle velocity changes to an electrical signal.
The electrical signal generated is processed by the SDM
and then compared to a value stored in memory. When
the generated signal exceeds the stored value, the SDM
will cause current to flow through the air bag assembly
deploying the air bags.
Refer to Supplemental Restraint System (SRS) and
Restraint Control System in Restraints.