Description

DESCRIPTION





This vehicle is equipped with a Steering Column Control Module (SCCM) that houses a clockspring (2), the left multi-function switch (1), and the right multi-function switch (3). The SCCM is secured near the top of the steering column below the steering wheel and is completely concealed beneath the steering column shrouds. The SCCM is installed as a modular unit that supports the left (lighting) multi-function switch (1) and the right (wiper) multi-function switch (3). The controls for each of these switches extend through appropriate clearance holes provided in the steering column shrouds.

The SCCM utilizes integrated circuitry and information carried on the Controller Area Network (CAN) data bus along with several hard wired analog and multiplexed inputs to monitor both the right and left multi-function switches, the ignition switch, the horn switch, and the speed control switches. In response to those inputs, the SCCM controls and integrate many electronic functions and features of the vehicle through both hard wired outputs and the transmission of electronic message outputs to other electronic modules in the vehicle over the CAN data bus. Description.





The clockspring is contained within a flat, round molded plastic case (1). The back (instrument panel side) of the case has an integral mounting bracket that is secured to the stationary steering column housing with three screws.

The electronics for the lighting functions and the wiper functions are located in the left lighting stalk, or left multi-function switch. There is a jumper wire from the wiper stalk that connects to the lighting stalk. The messages are than sent over the LIN bus to the Cab Compartment Node (CCN) and the CCN then transfers the message to the TIPM on the CAN bus.

A service replacement SCCM is shipped with the clockspring pre-centered and with a molded plastic locking pin installed. The locking pin secures the centered clockspring rotor to the SCCM case during shipment and handling, but must be removed after the SCCM is installed on the steering column and the steering wheel is installed. Service and Repair.

If faulty or damaged, each component of the SCCM can be replaced individually, including the clockspring, and the left and right multi-function switches.