Upper Column
| ITEM | DESCRIPTION |
|---|---|
| 1 | Steering wheel module and clockspring assembly |
| 2 | Screw (2 off) |
| 3 | Upper cowl |
| 4 | Tilt adjustment motor |
| 5 | Electric steering column lock or dummy lock |
| 6 | Energy management plate |
| 7 | Outer bracket |
| 8 | Reach adjustment motor |
| 9 | Swing bracket |
| 10 | Column spindle |
| 11 | Column jacket |
| 12 | Inner bracket |
| 13 | Screw (2 off) |
| 14 | Steering column adjustment switch |
| 15 | Lower cowl |
| 16 | IAU transceiver (where fitted) |
The column spindle is part of the column jacket assembly, that is installed in the swing bracket. An electric motor on the swing bracket drives the column jacket assembly axially within the swing bracket to provide the reach adjustment of the steering column.
The swing bracket is attached to the inner bracket with two pivot pins at the front and two threaded spindles at the rear. A second electric motor on the swing bracket drives the spindles to raise and lower the rear of the swing bracket, relative to the inner bracket, to provide the tilt adjustment of the steering column.
The inner bracket is located on rails in an outer bracket, which is attached to the cross car beam. The inner and outer brackets are locked together by an energy management plate, which is attached to both brackets with screws. In a serious impact, to prevent excessive force causing injury as the driver strikes the airbag, the inner bracket progressively moves forwards on the rails in the outer bracket. The movement is controlled by sections of the energy management plate that peel back in a controlled manner, absorbing energy and allowing the steering wheel to move with the driver.
The steering wheel module and clockspring assembly is attached to the top of the column jacket by two screws. The assembly includes the multifunction switches for the exterior lighting and for the wipers and washers.
Upper and lower cowls cover that part of the upper column not concealed by the instrument panel. The steering column adjustment switch, for control of the tilt and reach adjustment motors, is installed in the right side of the lower cowl. The lower cowl also contains an IAU (immobilizer antenna unit) transceiver for the passive entry passive start system.
For additional information, refer to: ANTI-THEFT - PASSIVE