Selector Lever Position
WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
A series of sensors in the SLA inform the TCM of the position of the selector lever.
The TCM monitors the SLA for all shift lever positions through five position circuits. The SLA provides a low-current 12-volt signal to the TCM. The TCM compares the on/off signals to programmed combinations to determine the exact position of the shift lever.