Clockspring Assembly / Spiral Cable: Description and Operation

The SIR Coil Assembly consists of two current carrying coils. They are attached to the steering column and allow steering wheel rotation while maintaining continuous driver deployment loop contact through the Driver Inflator Module.
There is a shorting bar on the lower steering column connector which connects the SIR Coil to the SIR wiring harness. When the lower steering column connector is disconnected, the shorting bar shorts the circuits from the SIR Coil to the Driver Inflator Module. The circuits to the Driver Inflator Module are shorted in this way to help prevent unwanted driver air bag deployment when servicing the steering column or other SIR components.