If you have the base JBL stereo, then you can only adjust ASL to ON or OFF. You cannot adjust the ASL volume as per the manual. In the thread below, at least one NAV user also states that his ASL is either ON/OFF with no volume control. I know that Scion head-units have the ability to adjust the ASL sensitivity, so not sure why our Camry head-units don't have the same feature.

http://www.greenhybrid.com/discuss/s...&highlight=asl

CAMRHEE Hybrid - FOR SALE!!!!
Completed Mods: RK-Sport body kit, 18" LexusGS430 wheels 235/50ZR18 tires, TRD/SE springs, Rear Lip Spoiler, Terk XM-Direct, Smoked tail lights, Sliding Armrest, Rear Bumper Applique, Front License Bracket, Lower Grill chrome inserts, K&N, Blaupunkt THB200A sub, moved rear HSD emblem
Future Mods: fog lights, black chrome my wheels

http://www.greenhybrid.com/share/fil...fterFront4.JPG