Recently I was unable to stop my 2000 Avalon with 4 wheel disc brakes and Michelin X-Ice Winter Radial Tires. The speed was 20-25 MPH and the roads were slippery / icy. The temperature was just below freezing and there was fresh snow polished by rush hour traffic on the smooth asphalt road. Up until that point the car has always been braking normally. I get the car inspected by a very competent shop 4 times a year & have all repairs done ASAP.
A couple of the rotors were slightly out of round (mild brake pedal pulsing on braking) and were scheduled for replacement the next time I needed brake pads.
I'm uncertain if the problem was the icy roads / black ice or some problem with the brakes that suddenly cropped up. Up until that incident the brakes worked fine every time. Right after the incident the brakes also appeared to work fine - but now I'm afraid to have the problem reoccur. I have the car in the shop to have them look for possible problems and I am asking this group for suggestions on things I could have the shop check for.
I saw a post talking about a faulty power booster & will have the shop check that - along with the vacuum supply to the booster. There were no ABS or other warning lights on the dash & all those bulbs do momentarily self-test when I start the car.
I recall in the past hearing and feeling the ABS chatter when I would be braking on slippery roads. This time - as I slid along I did not hear the ABS and I also found the brake pedal to be rock hard and not responsive to me pressing on it. At first I tried using a steady pressure - but the car just sailed along as if I had not hit the brake pedal at all. Then I began 'stomping' on the pedal & still - nothing - no slowdown at all. Very Scarry.
All suggestions appreciated.
Thanks, Cindy