The AWLS channels have everything the system needs:
* ILS frequency
* Runway heading
* TACAN channle (if it exists)
* Glideslope
When activated, the AWLS TACAN channel will override the selected TACAN channel while it is active. When you deactivate AWLS, the previous TACAN channel is selected again.
Check the EHSD page, the words AWLS must be boxed.
The list is in the pocket guide in the last pages. You can find the pocket guide in the Docs folder.