Last post on Dec 31, 2009 at 3:54 PM
You are in the Subaru Legacy & Outback
What is this discussion about?
Subaru Legacy, Subaru Outback, Brakes, Sedan, Wagon
#3 of 6 Re: 2010 Outback ABS problem? [bdeyes]
Dec 30, 2009 (7:02 am)
Oh, one other thing. Per section 7-25 of your user manual, ABS does not engage below 6 MPH. (Presumably to allow shorter stops on ice and gravel at very low speeds). This is common across all manufacturers, IIRC.
My point is, what you observed as a very slow locking and unlocking when watching your car may not have been ABS, but rather the actual tires gaining and losing traction while braking on whatever slick surface your were testing them on.
I've observed this on snow, where the crunching sound of the snow being compacted under my tires while braking can mimic the feel/sound of ABS.
So, like I said in my previous post, you may just be looking too hard to find a problem.
Hope this helps. Please post what you find out.
#4 of 6 Re: 2010 Outback ABS problem? [eps105]
Dec 30, 2009 (8:24 am)
The comparison between the Outback and the Accord wasn't under optimal conditions because we did it in a partially snow-covered parking lot with a relatively short distance to accelerate and brake, but in both cars the ABS definitely activated. My son and I took turns driving both cars, so I had the opportunity to observe both inside and outside the vehicle. When I was watching the locking and unlocking of the wheels from outside the car I can't swear that the speeds were identical, but they were both in the 15-20 mph range.
The Honda system definitely sounds different as there is a distinct hum or buzz when the system activates that is reduced or absent in the Outback. In the Outback (at least in mine) it feels like the brake is being applied and released at a lower frequency with a harsher, more mechanical feel. This is consistent with my observation from outside the car, but I can't really quantify the difference. They may both be proper activation of slightly different systems. All I know is that after 10 years of driving Hondas, the feel of the Subaru system is different enough that I wish I could get confirmation that it is performing as designed.
I did the comparative testing while on a trip in Colorado (the Outback performed admirably in the mountains). Now that I am out of snow country, getting reliable road conditions to test the ABS may be difficult. This is why I am asking for other people's experience to see if there is a good reason to push the issue with the service department.
Thanks for your input.
#5 of 6 Re: 2010 Outback ABS problem? [bdeyes]
Dec 30, 2009 (11:21 am)
The way you describe your ABS performance sounds exactly the way all 5 of our Foresters have acted. It is definitely different than the way my Tundra does it.
I think what you have is normal and as Elliot said it is just the different implementation of the manufacturers. I also have to say that the first time it happened on my first Forester it made me sit up and wonder if it was normal because of the feel and noise, but since all 5 have performed the exact same way I don't think about it anymore.
#6 of 6 Re: 2010 Outback ABS problem? [bdeyes]
Dec 31, 2009 (3:54 pm)
A very big factor that affects ABS is tires. Obviously less traction will force the ABS to work harder.
From what I read, the previous generation Impreza with the OEM tires produced horrific ABS response. After a change in tires, it was night and day.