mountaingoatgruff Posted April 20, 2009 Share Posted April 20, 2009 97 OBS EJ22 5MT ABS is there some special technique or procedure for these brakes? i pulled the booster and master out for other work. i also disassembled, cleaned and reassembled the front brakes while replacing axles - pads and rotors are worn but okay. i haven't touched the rear brakes yet. i bench bled the master before reinstalling, then bled each wheel in this order: right front left rear left front right rear i didn't see a bleeder or anything on the abs unit so i didn't do anything with it. pedal feels good but you have to press harder on the pedal than before. does this sound like air trapped in there or maybe a problem with the booster? i couldn't find answers by searching. thanks Quote Link to comment Share on other sites More sharing options...
Rooster2 Posted April 20, 2009 Share Posted April 20, 2009 I am no expert on abs systems, however, from my own experience on my 99 OBW with abs, I used a "one man" bleeder unit last summer to put in fresh Dot 3 brake fluid. All went well, with the car stopping well ever since. I am not aware of anything to bleed on the abs system itself. To me, it sounds like your brake job is finished. Quote Link to comment Share on other sites More sharing options...
nipper Posted April 20, 2009 Share Posted April 20, 2009 Damn and i thought i was an anal retentive engineer. This description makes me look absoloutly sloppy http://endwrench.com/images/pdfs/BrakeFluidSumm02.pdf nipper Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted April 21, 2009 Share Posted April 21, 2009 Yah the trick might be the sequence control while bleeding. It is fun putting it in sequence control too because it almost sounds like music as it cycles all its little valves and the motor is running in there. Quote Link to comment Share on other sites More sharing options...
mountaingoatgruff Posted April 21, 2009 Author Share Posted April 21, 2009 (edited) thanks for the pdf, nipper. "Sequence Control Operational Guidelines • Connect diagnosis terminals to 3 terminals (K) and 6 terminals (L) of the diagnosis connector located under the driver’s side of the instrument panel. • Set the speed of all wheels at 2 MPH or less. • Within 0.5 seconds after the ABS warning lamp goes out, immediately after the ignition switch is turned to on, depress the brake pedal and hold. Caution: Do not depress the clutch pedal. Note: When the ignition switch is set to on, the brake pedal must not be depressed. The engine must not operate." it seems like its saying you have to have all the wheels rotating at 2mph with the engine off... huh? then all it says about sequence control besides how to get there (the above excerpt) is this: "Conditions For Completion Of Sequence Control • When the speed of at least one wheel reaches 6 MPH, the operation is returned to the normal control mode. • When the L terminal is separated from ground, the operation is returned to the normal control mode. • When the K terminal is separated from ground, the operation goes to the trouble code display mode. • When the brake pedal is released during sequence control and the braking lamp switch is set to OFF, the operation is returned to the normal control mode." what am i actually supposed to be doing by placing the system in sequence control mode and how do i know if i've done it? Edited April 21, 2009 by mountaingoatgruff Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted April 21, 2009 Share Posted April 21, 2009 (edited) Right, 2mph or less[b/]. i.e. if the vehicle is stopped/not moving (0 mph) then you can enter sequence control. (this is probably the safest time to do this job, though some people might try to do it on their way in to work to save time along with eating a donut drinking coffee combing their hair talking on their cell phone while tying their shoes), Oh you'll know when it enters sequence control. It will sound like a strange music coming from the hydraulic unit, all kinds of buzzings and such. It's pretty neat. Be careful not to be overtaken as it sounds like the Sirens to a forlorn Subaru sailor. Edited April 21, 2009 by porcupine73 Quote Link to comment Share on other sites More sharing options...
idosubaru Posted April 21, 2009 Share Posted April 21, 2009 sequence control is the ABS unit cycling all it's valves and goodies inside to let air through. i doubt you need to worry about sequence control. i've had the MC emptied before too and did fine just bleeding normally, never messing with the ABS unit. I think i may have cracked the individual lines open at the ABS unit to let any air out...but I dont' remember exactly. Quote Link to comment Share on other sites More sharing options...
mountaingoatgruff Posted April 22, 2009 Author Share Posted April 22, 2009 why don't they just say stopped?!? i don't mind anal retentive engineers but specifying 2mph or less is sort of misleading. damn, this Siren is hot! well, i tested the booster cuz it seemed my symptoms were pointing there and found the vac hose was backwards so the check valve was preventing vac supply from reaching the booster. flipped it around and the brakes work great so apparently like gary said i didn't need to do sequence control. Quote Link to comment Share on other sites More sharing options...
nipper Posted April 22, 2009 Share Posted April 22, 2009 Yah the trick might be the sequence control while bleeding. It is fun putting it in sequence control too because it almost sounds like music as it cycles all its little valves and the motor is running in there. So it sounds like this in a way? Quote Link to comment Share on other sites More sharing options...
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