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S-AWC System For discussion of the S-AWC system and it's components including (but not limited to) driveshafts, differentials, programming, etc.

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Old 06-23-2011, 08:17 PM   #1
twinturbogreg
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Transfer Case ACD Bleeding

Is there any way to power up the ACD pump to bleed the system? I have called 3 dealers to do this for me and have gotten 3 differant answers. One said I don't have to bleed it, One said $150, and the other said $325. Do we have any Mitsu Techs on here to check into this for me?? Any help would be great! Thanks guys
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Old 06-23-2011, 08:30 PM   #2
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http://http://www.evoxforums.com/for...t=36393&page=6

You won't be successful in ever finding any dealers that agree with each other on this issue. I tried.
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Old 06-23-2011, 08:33 PM   #3
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Safe way: Fill the ACD/AYC at the same time. Top the reservoir in the trunk. Bleed with scan tool. Risky way: Fill as stated above, find a safe road within a few hundred feet of filling it, and do some insane left right maneuvers in gravel mode to trigger pump activation. The latter method may burn your pump out if not done just right.
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Old 06-23-2011, 08:39 PM   #4
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Key on/off with gas pedal to the floor, repeat, bleeds itself.
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Old 06-23-2011, 08:43 PM   #5
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Bryan I tried that on mine and it doesn't work. Be sure to listen to the pump. If you don't hear it running in the trunk area, it may not do it for you either.
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Old 06-24-2011, 05:28 AM   #6
mantella
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what about jumping the relay for short periods like 15seconds when opening the bleeder valave? if the shop you go to has a snap on scantool it can bleed it aswell.
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Old 06-24-2011, 07:59 AM   #7
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so scan tool is the only thing that will work for sure?
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Old 06-24-2011, 12:31 PM   #8
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Quote:
Originally Posted by mantella View Post
what about jumping the relay for short periods like 15seconds when opening the bleeder valave? if the shop you go to has a snap on scantool it can bleed it aswell.
It's not just about the pump spinning. It needs to KNOW to open certain valves to the lines in order to purge the air. It's not like the pump runs when you're driving it hard, and just applies pressure to everything. It controls which lines get which pressure, bleed, etc. That's why I use a scanner. Nothing like the system hitting a freakin' air bubble right when you're counting on it going into a turn at ludicrous-speed.
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Old 06-24-2011, 05:52 PM   #9
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Quote:
Originally Posted by lallen3 View Post
Bryan I tried that on mine and it doesn't work. Be sure to listen to the pump. If you don't hear it running in the trunk area, it may not do it for you either.
It works for ACD, which you asked about. The title of your thread is "Transfer Case ACD Bleeding", not AYC as well.
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Old 06-24-2011, 07:28 PM   #10
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Quote:
Originally Posted by razorlab View Post
It works for ACD, which you asked about. The title of your thread is "Transfer Case ACD Bleeding", not AYC as well.
Yeah but the same pump controls both via opening and closing hydraulic solenoids, not dissimilar to an ABS modulator.
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