Description And Operation: Description
The Steering Column Control Module (SCCM) is located near the top of the steering column below the steering wheel. The SCCM includes the clockspring (2), the left (lighting) multifunction switch (1), and the right (wiper) multifunction switch (4).
The SCCM is secured to the steering column by an integral band clamp (6) on the left side of the instrument panel side of the SCCM. The SCCM has a centering latch located on the top right of the instrument panel side of the SCCM to be certain the SCCM is centered properly.
There are also unique lugs cast into the outer circumference of the steering wheel hub that must be engaged into slots within the inner circumference of the clockspring rotor hub to unlock and drive the clockspring. The steering wheel must be tightened to specification to ensure proper clockspring function.
The SCCM includes four integral connector receptacles (5) that face toward the instrument panel and are connected to the vehicle electrical system through four take outs and connectors of the instrument panel wire harness. The connector receptacle near the top of the back of the unit facing toward the instrument panel contains the circuits for the multifunction switches. The connectors near the bottom of the unit contain the circuits for the clockspring and the receptacles on the steering wheel side of the clockspring.
The upper surface of the rotor hub (clockspring) (2) has short pigtail wires with connectors. The pigtail connectors (7) contain the circuits for the Driver AirBag (DAB). The connector receptacles (3) on the steering wheel side of the clockspring contain the circuits for the other switches mounted on the steering wheel.
The service replacement SCCM is shipped pre-centered and has a spring actuated molded plastic automatic locking ring installed. The automatic locking ring secures the centered clockspring rotor to the SCCM case during shipment and handling, and automatically releases the rotor when the steering wheel is installed. However, it is recommended that an additional strap be installed through the two retainer loops integral to the outer circumference of the SCCM to secure the rotor to the case whenever the SCCM is removed from the steering column to prevent accidental loss of clockspring centering.
The SCCM cannot be adjusted or repaired. If ineffective or damaged or the DAB has been deployed, the entire SCCM must be replaced.