Memory Column Operation

The memory SET switch is monitored by the DDM. When a memory position is recalled using the memory SET switch, the DDM sends a message to the DSM. The DSM activates the tilt/telescope motors to adjust the steering column to the position that is stored in the DSM memory. Once the steering column reaches the desired position, the DSM deactivates the steering column motors. If the DSM receives a steering column switch input during a memory position recall function, the module stops the memory recall and responds to the new steering column switch position input.

The DSM monitors the steering column position using Hall-effect sensors that are integral to the tilt and telescope motors. The sensors provide a signal used by the DSM to calculate the position of the steering column. The DSM uses this to store and recall memory positions, to activate the easy entry/easy exit feature and to make sure the tilt and telescope motors do not stall against the end of travel. If a tilt or telescope motor sensor DTC is set, the DSM does not recall programmed memory positions or activate the easy entry/easy exit feature.

The memory position recall is also used when a valid programmed key is associated with one of the memory SET buttons. When detected, the BCM sends a message to the DSM, which moves the steering column to the position that is stored in the DSM memory.