95 legacy L sedan. 2wd. 147,000

 

Last night while traveling rt 30 from Lancaster to York in my 04 4Runner, Had to do a quick stop from 30 mph due to a "stupid person" losing control in the snowstorm. ABS kicked in, got the typical shaking feel and came to a stop without any problems. Today, ran in to work in my Sube to shovel out the shop, I decided to test my ABS. Nothing happen?? Brakes locked up and I slid. Tried it at about 40 mph on a snow packed road. Tried over and over again a couple of times throughout the day. No vibrations, nothing. I actually drive quite cautious in the snow and rarely have reason to lock up my brakes so I honestly do not recall ever needing the ABS on my Sube. Now I am wondering if something is wrong or why they are doing this? ABS light comes on and goes off when starting the car and never did anything but this.

Any ideas before I take it in?

The ABS won't activate if all four wheels are locked (the module interprets this as a full stop). AWD also reduces the tendency for the wheels to lock. If you have all four wheels off the ground, put the car in neutral, and step on the brake, the ABS should kick in, since all the wheels almost never stop at the same time. Without knowing your exact test conditions, I can't offer much more input.