The inflatable restraint steering wheel module coil consists of two or more current-carrying coils. The inflatable restraint steering wheel module coil attaches to the steering column. Two of the current-carrying coils allow rotation of the steering wheel while maintaining continuous contact of the driver deployment loop to the inflatable restraint steering wheel module (the air bag itself).
There is a shorting bar on the yellow 2-way connector near the base of the steering column that connects the inflatable restraint steering wheel module coil to the SIR wiring harness. The shorting bar shorts the circuits to the steering wheel module coil and steering wheel module (air bag) during disconnection of the yellow 2-way connector. The shorting of this circuitry is designed to help prevent unwanted deployment of the air bag when servicing the steering column or other SIR system components.