K 2500 Truck 4WD V8-454 7.4L VIN J SFI (1997)
Air Bag Deactivation Switch: Description and Operation
The Inflatable Restraint I/P Module Enable Switch (Pickup arid Extended Cab Only) is a manual two-position key switch located in the instrument panel,
to the right of the steering wheel. The vehicle operator may choose to disable the inflatable restraint I/P module if there is no occupant in the front seat,
or if there is a child in a rear-facing child seat in the front seat. This switch gives the vehicle operator the ability to enable or disable inflatable restraint
I/P nodule (passenger front air bag) deployment should the vehicle be involved in a severe frontal collision.
The manual key-switch operates either of two positions. When the key is vertical, the switch is in the OFF position and the inflatable restraint I/P module
is in the suppressed (disabled) state. In the suppressed state, the inflatable restraint I/P module will not deploy in the event of a severe frontal collision.
When the key is horizontal, the switch is in the ON position and the inflatable restraint I/P module is in the nonsuppressed (enabled) state. In the
nonsuppressed state, the inflatable restraint I/P module will deploy in the event of a severe frontal collision. The key-switch assembly also includes a
backlit switch cover which illuminates when the headlights are on.
The enable switch is directly interfaced to the inflatable restraint Sensing and Diagnostic Module (SDM) The SDM senses the state of the enable switch.
When the enable switch is in the ON position, the SDM enables possible deployment of the inflatable restraint I/P module. When the enable switch is in
the OFF position, the SDM disables or inhibits possible deployment of the inflatable restraint I/P module.
