ABS Failing Options

[barterj]

I am away at college and don't drive my car that often anymore . I noticed that when I drove it during thanksgiving break that the ABS failed to work when i had to stop quickly, luckily I didn't rearend the car in front of me. The Front Right Tire locked up, and then after that i noticed that when I normally apply my breaks that the Front Right Wheel seems to have more breaking pressure than the Front Left Wheel. I have gone through the electrical part of the system and can't find the problem. The ABS light is NOT on. My first assumption was the the ABS computer has failed, then i thought that the ABS module had died but either of those would make the ABS light come on. Also the ABS solenoids are fine and working. I plan on having the issue diagnosed Toyota. Does anyone know what could possibly be the problem?

[barterj]

I can hold the Steering wheel completely straight, (the car doesn't need an alignment) and when I apply to brake to stop normally, the car will pull to the right. My father and i also spent 2 hrs bleeding the brake system thinking that could have been the problem. I just remembered that there is what I think may be a proportional valve behind the engine on the firewall, could that be causing part of the problem?