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Bleeding ABS unit - Mazda #4517016
09/15/17 11:09 AM
09/15/17 11:09 AM
Joined: Apr 2017
Posts: 173
PA
Chester11 Offline OP
Chester11  Offline OP
Joined: Apr 2017
Posts: 173
PA
I think I pushed some air into my ABS unit. At least I am hoping that is the problem.

I've changed pads, and replaced the fluid, but the pedal is still soft. I'm going to relube the caliper pins and bleed again this weekend.

The manual says ABS bleed is a dealer only process - apparently it requires a scan tool to activate the system and push the air out of the unit and into the brake lines. (My interpretation).

Will some hard stops bleed the unit by activating the system? Anyone tried it?

Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517025
09/15/17 11:24 AM
09/15/17 11:24 AM
Joined: Feb 2013
Posts: 3,392
Central Virginia
Silverado12 Online content
Silverado12  Online Content
Joined: Feb 2013
Posts: 3,392
Central Virginia
Not sure if this is even related, but I had a hard time with a Hyundai Santa Fe brake job and I bled them diagonally and that ended up fixing it. Also, another thing that drove me nuts was the pads took a long time to 'feel right".


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517045
09/15/17 11:55 AM
09/15/17 11:55 AM
Joined: Dec 2003
Posts: 9,979
Florida, Cape Coral
Eddie Online sleepy
Eddie  Online Sleepy
Joined: Dec 2003
Posts: 9,979
Florida, Cape Coral
Once you've messed up and gotten air into a ABS system it is difficult to get the air out with out the recycling tool. A brake shop should be able to do this. Trying to clear the system of air by abusing the brake system with multiple panic stops would prove frutal I think. Ed


CX5 Touring 2.5L :-)
Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517162
09/15/17 02:12 PM
09/15/17 02:12 PM
Joined: Oct 2014
Posts: 1,103
SW Ontario Canada
KGMtech Offline
KGMtech  Offline
Joined: Oct 2014
Posts: 1,103
SW Ontario Canada
Had the same problem with my wife's 2009 Ford Flex. One of the rear calipers developed a leak and I was not aware until my oldest son told me after he drove for 2.5 hours round trip to a concert...the BF reservoir got low enough to get air in ABS system.

2 attempts by me with my Motive Bleeder, no luck. Tried the redneck way of activating the ABS system on gravel roads, still no luck.
Took it to Ford dealer, spent the money and they activate ABS circuits by OBDII portal and all was good. Lighter wallet, but hard brake pedal.


2017.5 Nissan Rogue SV FWD
2013 Nissan Maxima SV
2009 Ford Flex SEL FWD
1984 Yamaha XJ750RL
Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517244
09/15/17 04:13 PM
09/15/17 04:13 PM
Joined: Oct 2012
Posts: 2,489
Staten Island, NY
michaelluscher Offline
michaelluscher  Offline
Joined: Oct 2012
Posts: 2,489
Staten Island, NY
FORScan might be able to do it


'06 Toyota Camry SE V6 3MZ-FE 100k
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Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517274
09/15/17 04:56 PM
09/15/17 04:56 PM
Joined: Jan 2004
Posts: 4,639
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,639
California
Originally Posted By: Chester11


Will some hard stops bleed the unit by activating the system? Anyone tried it?

Depends on the system - you just described how I had to bleed a friend's Tahoe with the Kelsey-Hayes ABS system.

You can try a few hard stops to trigger the ABS and then bleed. A pressure bleeder does help with ABS. Have you tried topping off the MC and cracking the line fittings at the modulator to get fluid moving in that direction and then bleeding at the wheels?

Re: Bleeding ABS unit - Mazda [Re: nthach] #4517536
09/16/17 12:02 AM
09/16/17 12:02 AM
Joined: Apr 2017
Posts: 173
PA
Chester11 Offline OP
Chester11  Offline OP
Joined: Apr 2017
Posts: 173
PA
Originally Posted By: nthach


You can try a few hard stops to trigger the ABS and then bleed. A pressure bleeder does help with ABS. Have you tried topping off the MC and cracking the line fittings at the modulator to get fluid moving in that direction and then bleeding at the wheels?


Not tried this - the lines looked pretty small and was afraid to break them, or introduce more air into the system.

Re: Bleeding ABS unit - Mazda [Re: Chester11] #4517538
09/16/17 12:06 AM
09/16/17 12:06 AM
Joined: Dec 2002
Posts: 41,977
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 41,977
'Stralia
Find some wet grass, and let it grind to a halt a few times between bleeds.

Re: Bleeding ABS unit - Mazda [Re: Shannow] #4517563
09/16/17 02:50 AM
09/16/17 02:50 AM
Joined: Jun 2017
Posts: 133
Tennessee
ChevyMan93 Offline
ChevyMan93  Offline
Joined: Jun 2017
Posts: 133
Tennessee
Originally Posted By: Shannow
Find some wet grass, and let it grind to a halt a few times between bleeds.


Fully agree with this statement.


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