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2010 with multiple codes

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R
Hi,
I picked up a 2010 with 160k relatively cheap from a friend because it had multiple codes and the stealerships quoted him a bunch of costly unrelated repairs. I want to see if I can bring it back to life. Currently the most troubling codes are transmission related: two P1718's and a P0751.
I've read everything I could find here that looks to be related, which bring up these questions:
1) Since I drained ATF, dropped the tranny pan and removed the internal filter, am I going to have to get it to "re-learn"?
2) What does that mean and what does it entail for an amateur?
3) Does this model have the external AT filter? I've read conflicting statements.
4) Is the P1718 ALWAYS an indication of something electrical, or could it be as simple as a filthy filter and low, filthy fluid?
5) speaking of electrical and simple - could jumping the battery REALLY cause the P1718? I did get the "like getting rear ended" delayed engagement. That tells me there's an actual problem and not a false code from an electric spike.

I guess that's it for now. I hope you guys are still active on here!
Thanks,
Rob
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Flat6er
first and foremost - get yourself FSM and read it.
second - it is always nice when somebody is asking for help and providing error message codes, yet, if somebody wants to help - they need to look up themselves... or you expect for us to know each and every code without looking? ;)

1) FSM suggests to do that.
2) it will require you to visit somebody whose hardware+software allow to do that learning on your TG5D. it might be stealership. 8)
3) remove front bumper and see for yourself?
4) did you even read the errors description? "open circuit in can bus communication bus off, shorted ecm, abs/vdccm, BIU malfunction"- yeah... sounds like filthy fluid :D
5) if you are really stupid - absolutely. some people like to give jump start from running car...
6) P0751 - shift solenoid A performance or stuck off (front brake solenoid). this might be issue with bad fluid, but I wouldn't count on it. there are two kinds of solenoids in TG5D - so there is 50% chance that this solenoid is the one which has part number in toyota land...

personally - I would replace fluid couple of times with some driving in between. just be effffing careful with level. I fucked up my transmission because I wasn't smart enough :)
erase all error messages. and see at the result. if that 0751 is not going away - replace solenoid.
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Flat6er said:
first and foremost - get yourself FSM and read it.
second - it is always nice when somebody is asking for help and providing error message codes, yet, if somebody wants to help - they need to look up themselves... or you expect for us to know each and every code without looking? ;)

1) FSM suggests to do that.
2) it will require you to visit somebody whose hardware+software allow to do that learning on your TG5D. it might be stealership. 8)
3) remove front bumper and see for yourself?
4) did you even read the errors description? "open circuit in can bus communication bus off, shorted ecm, abs/vdccm, BIU malfunction"- yeah... sounds like filthy fluid :D
5) if you are really stupid - absolutely. some people like to give jump start from running car...
6) P0751 - shift solenoid A performance or stuck off (front brake solenoid). this might be issue with bad fluid, but I wouldn't count on it. there are two kinds of solenoids in TG5D - so there is 50% chance that this solenoid is the one which has part number in toyota land...

personally - I would replace fluid couple of times with some driving in between. just be effffing careful with level. I fucked up my transmission because I wasn't smart enough :)
erase all error messages. and see at the result. if that 0751 is not going away - replace solenoid.
Click to expand...
Thanks for your reply. I appreciate you taking the time.
1) Do you have a suggestion as to where to obtain the field service manual? (or is it "effing service manual"?)
2) I guess I read so many threads about P1718 and what it could mean, I had it in the back of my mind that this is the 5EAT transmission forum where everyone is familiar with the ol' P1718, that little bugger.
3) was hoping to avoid that. i know there's several ways in - remove bumper, wheel well, or battery mount. I also know they did away with that filter in later models but it seems to be a secret when that started. Often aficionados and enthusiasts have experiential knowledge about esoteric manufacturing quirks that they are itching to share.
4) Yes I did. The description my code reader gave me said nothing about a shorted ecm abs/vdccm or BIU. Just the CAN communication thing and I don't know what CAN is. I can't tell if you're joking or not about dirty fluid.
5) Not that it really matters, but if I did cause the P1718 with a jumpstart wouldn't that be a false code and I wouldn't have the symptom of the tranny not-engaging then suddenly POW! - ENGAGING..?
6) Thanks for the extra number! The P0751 code came up in my scanner under transmission, but I don't recall it telling me it was about a shift solenoid. Please be patient while I learn the Subabu lingo: TG5D is the valve body...?
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R
Flat6er: Never mind #1. Dug around a bit more...
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Flat6er
hope that helps. sorry for being a tad angry-rude - sometimes people behave very karenish... :)

2) haven't had it. may be it's just me :D
3) they dropped that filter some time around 2010-2012... sooo... check parts diagrams, may be some hose configuration is "giveaway".
4) I read in FSM that description. CAN is "main network" of all important ecu-s in a car. but since there is no timestamp on errors - I was suggesting to replace the fluid, erase those errors and see - is it still present or not. that was sarcasm about fluid being responsible for bringing down can bus or some ecu.
5) sudden "boom from bottom/rear" would be more matching either bad center differential(that you should have seen in transmission pan then) or P1710(?) (second turbine sensor?) - that I had and did some writeup(not just me :) ) here too.
6) 5eat are two generations of this transmission in Subaru(in nissans they have at least 5 generation of valve bodies - don't know about the rest) - tg5C (<=MY2007) and tg5D(MY2008+). different torque converters, different solenoids, different hydraulic valve units, different second turbine sensor, in D one solenoid(and one multiplate clutch?) was removed, learning procedures are different (on C you can do it by your self on parking lot, on D - you need lift and proper bidirectional scanner).
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Flat6er said:
hope that helps. sorry for being a tad angry-rude - sometimes people behave very karenish... :)
Click to expand...
I'm just happy somebody replied. A shade-tree mechanic like me gets hold of some random vehicle and starts doing searches on codes. The next thing you know it's 2am and you're WAAAAY down some bizarre rabbit hole of best practices, gotchas, and opinions stated as undisputable fact, and have watched several Youtube videos on tangentially-related projects. You still don't know anything but you can ask questions that sorta sound like you might.
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Flat6er
:D I guess I am kinda "shadetree mechanic myself ;)))
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Flat6er said:
first and foremost - get yourself FSM and read it. <---------------------This goes against forum rules.
second - it is always nice when somebody is asking for help and providing error message codes, yet, if somebody wants to help - they need to look up themselves... or you expect for us to know each and every code without looking? ;)

1) FSM suggests to do that.
2) it will require you to visit somebody whose hardware+software allow to do that learning on your TG5D. it might be stealership. 8)
3) remove front bumper and see for yourself?
4) did you even read the errors description? "open circuit in can bus communication bus off, shorted ecm, abs/vdccm, BIU malfunction"- yeah... sounds like filthy fluid :D
5) if you are really stupid - absolutely. some people like to give jump start from running car...
6) P0751 - shift solenoid A performance or stuck off (front brake solenoid). this might be issue with bad fluid, but I wouldn't count on it. there are two kinds of solenoids in TG5D - so there is 50% chance that this solenoid is the one which has part number in toyota land...

personally - I would replace fluid couple of times with some driving in between. just be effffing careful with level. I fucked up my transmission because I wasn't smart enough :)
erase all error messages. and see at the result. if that 0751 is not going away - replace solenoid.
Click to expand...

RULE 2 - Do not tell anyone to read the manual or otherwise search for the information unless you are providing them the information first hand in your post. Some of us have read enough manuals in our life where we just can't anymore. Spoon feed each other where you can. Stronger them equals a stronger you. With that said, this forum has a tremendous archival failures and often solutions. This is distinctively advantageous over platforms like Facebook where previous information is effectively gone with the wind. Based on this, please be sure that you are searching for previous issues and resolutions to this issue using the website search, google search, and google search of the website before posting.
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Reopened the thread at rauffrey's request.Flat6er, you know the drill. Please work with him and if you are having a bad day knock off the RTFMisms brother. ;)

Thanks.

Bumping the thread for others to assist as well.
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Thanks Admin. I've taken Flat6er's advice and am about to do a full ATF flush and replacement, plus a new internal filter (the external oil-filter-like one inside the left fender does not exist on my car) and new tranny pan since the existing one is rotting and won't last long. I'll do engine oil and filter while I have it up on jack stands, and probably flush or at least top off the transfer case/differential with the drain plug right near the tranny pan. I'll report back with results, but I can't drive it much since it's not registered.

Thanks in advance to anyone who wants to chime in. I'm new to Subies and AT's but not to high mileage Japanese cars, emissions codes, and DIY auto mechanics.
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Flat6er
well... I am a big believer to use RTFM, pardon, RTFFSM :DDD
anyway:
there is no separate transfer. just AT fluid, front differential and rear. I would recommend finding those dipsticks and test your "abilities" to take them out, put back in, read and fill through those (at least I make such a mess.... :D
also - I am going to try out transmission gaskets instead of sealant (I think that my lack of experience with liquid gaskets are to blame, but still)... if you need part numbers - let me know. I think I bought three of those for ~9bucks on ebay.

Good luck! keep us informed and let's make future better than present :)
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R
I haven't even looked at the rear differential yet. It's up on stands so should be easy enough to inspect. I do believe I saw the dipstick for the front diff on the passenger side of the engine but I haven't gone at it yet. Taking the day off tomorrow to do what I described, clear codes, and take it for a spin. I'll add replacing gear oil in the diffs to that list. Can't hurt.
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Flat6er said:
well... I am a big believer to use RTFM, pardon, RTFFSM :DDD
anyway:
there is no separate transfer. just AT fluid, front differential and rear. I would recommend finding those dipsticks and test your "abilities" to take them out, put back in, read and fill through those (at least I make such a mess.... :D
also - I am going to try out transmission gaskets instead of sealant (I think that my lack of experience with liquid gaskets are to blame, but still)... if you need part numbers - let me know. I think I bought three of those for ~9bucks on ebay.

Good luck! keep us informed and let's make future better than present :)
Click to expand...
SMH...
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