Steering Column Adjust

Steering Column Adjust

The memory control module controls the electric adjustable steering column in a rake (up and down) and reach (in and out). The steering column can be adjusted for rake and reach by operating the rotary joystick control switch on the LH side of the steering column.





To adjust the steering column:
^ Turn the switch to the 'Column' or 'Auto' position
^ Move the switch forwards or backwards to adjust the reach
^ Move the switch up or down to adjust the rake.

Entry/Exit Mode
Entry/Exit mode provides automatic movement of the steering column and driver's seat to allow easier entry to or exit from the vehicle.

Entry/Exit mode is selected by setting the steering column adjustment switch to the 'AUTO' position.

NOTE:
^ If the adjustment switch is moved away from 'AUTO' whilst the steering column is tilted away, the steering column will move back to it's memorized position when the key is next inserted in the ignition. Entry/Exit mode will then be cancelled.
^ If the adjustment switch is moved during entry/exit operation, steering column movement will stop.

Exit
When the ignition key is removed, the steering column will move to the uppermost rake and innermost reach positions and the driver's seat will move slightly rearwards and lower.

Entry
When the key is inserted in the ignition the steering column and seat will return to their previous positions. If, however, the memorized driver position has been changed (using the seat memory switches or another key transmitter), the steering wheel and seat will move to the new position.

Steering Column Control
Adjustment of the steering column is achieved by a single DC motor. Each adjustment movement is transmitted through a solenoid actuated clutch; one clutch for reach movement and one for rake movement.

When engaged, a clutch can be released only if the system is unstressed. As the clutches are mounted on the same motor spindle, the sequence for position adjustment is as follows:
^ Engage the selected clutch by powering the appropriate solenoid
^ After a time period (approximately 0.1 of a second), the motor is powered in the desired direction
^ When the motor reaches the stop position the solenoid and motor is released/unpowered. The clutch remains engaged under stress
^ After a time period (approximately 0.1 of a second), the motor is powered in the opposite direction to enable the clutch to disengage when the stress is released.





Simultaneous rake and reach movements are not possible since the motor must reverse direction as soon as the first axis has reached it's required position.

Steering column rake and reach is controlled via potentiometer feedback.