Go to 09 Hyundai it's a Sonata and uh, the guy just bought this thing used but bought it with a known problem. Uh, it's got the big two four. He did leave us a note here. uh 09 Sonata 24 p880 that's what it has.

uh goes in reverse and drive stays in third one up shifter downshift. He cleaned all the grounds, changed the fluid, tested the wiring harness uh for continuity it looks like and then he said the previous owner change input sensor. It has a used computer that was never put in need a diagnosis, wanted to know what's wrong with it I Ran the report here on the Alto and indeed it does have the P880 in it and also an EVAP code an old one. So we're gonna pop into the transaxle here I Don't know if we're gonna need you know any data in here.

We're going to look up that 880 see if it gives us a code set criteria, see what it takes to generate this code and see what we can do to fix it. and I just thought I'd Bring you guys along so in case we find something cool. okay, let's see if we can't read and discover and learn along with each other here. Uh 880 TCM Power Signal Error Opener short to ground component locations description here: The H-i-v-e-c automatic Transmission so that's some acronym must be for whatever type of transmissions in it uh or the controller for it.

Whatever it says here, Supply is the power to the solenoid valves by way of a control relay. The TCM sets relay on the relay. operates the battery power or operates in the battery power supplied to the solenoid valves. When a TTM is off, the solenoid power is shut off.

Oh, and the transmission is held in third gear position. Fail safe mode. Oh, okay, so that makes sense. Um, so it has a solenoid or a relay.

Uh, that sends power to the solenoid valves and when it's off, it default to the third gear so that's good. Uh. Code description: Uh. Training Control Module checks the At Control relay signal by monitoring the control signal.

Okay, if after the engine key is turned on, an unexpected voltage value which is quite a bit lower than battery voltage detected. the TCM sets this code so that makes sense. It's looking for the output and it doesn't see it because it's looking at the Um control signal. So maybe it says Hey The control signal says hey, we're on I Don't see any power here at the Solenoid, so bang Bingo Bango Uh, this is the diagnostic trouble code detecting condition chart.

Uh Strategies: Check voltage ranges enables condition 22 volts greater than battery voltage. Oh I don't know my greater than less than sign Battery voltage greater than 9 volts time. Okay, threshold value. That's what we want.

Okay, so yeah, this is talking about enabling to enable the condition to run okay and then to set the code voltage less than seven volts or voltage greater than 24 and a half volts. So that kind of contradicts what they say here because it sits here if the season x a voltage value which is quite a bit lower than battery voltage. It sets the code, but according to this it can set it both ways higher or lower. Uh, what does it do Locks it into third gear.

Okay, so that's something that we know here We go. Here's some scan data: Hyundai's always good Hyundai Kia Data is always, usually always pretty good. Uh, connect scan to a DLC Can engine off monitor the AC Con relay voltage parameter and scan tool. Well let me just grab my scan tool here folks because we did open up some data but we never went through it.

Let's just have a quick peek here. What's it say? ET Con Really? Oh, we have at relay voltage so they have an Oem scan data at control relay voltage. but the only voltage data pit I have here is this one and we'll put it up in a dial for you. look at that 3.6 so that's pretty interesting.

3.6 Let's stick our scan tool down here and let's kind of keep poking through uh service data to see if there's other valuable information. Uh, is relay voltage within specifications? No. Go to wiring Harness Inspection procedure. Okay, that's what we're going to do.

Terminal Connection Inspection Power Circuit Inspection I Wonder if they have a diagram here? Let's just go pop back in and find a wire diagram for this transmission to see if this relay is external. That's one thing I Don't know. So we'll go down to transmission, not shift interlock transmission. It's got the big two four.

Let's find this relay. Where's the relay? Those are range switches. Diagram two of two. Here we go: ATM Control Relay Shunt Connector Interesting, not use, not use I don't know what that is I don't know what that means.

Let's see where the power comes out of that. It goes back over to six and seven ATM Solenoid valve. Just wonder where that gets all its powers from foreign I Might have to poke here for a minute folks. Uh, kind of learn the lay of the land here for relaxatory land.

Let me let me see if I can find us an Oem diagram. make sure we're not being led astray by misinterpretation here and then I'll uh, be back in touch with you folks. Let you know what I figured out. Maybe get a printout and come up with a diagnostic plan.

OEM Diagram is just about the same as a color diagram still shows that ATM Relay Shunt Connector they call it. it says it's in this engine compartment uh, fuse box here and I see right here it says ATM cont. So if we look at it like this, there are some pretty greasy fingerprints on it, so it's obviously it's been probably touched and swapped and moved. What happens when we just pull it, pull it out is what? I wonder? Well, this this stays at 3.6 so that doesn't change.

Uh, just out of curiosity. let's see if we hear it clicking. Maybe a solid state relay? Yeah, I don't hear it click. Let me grab a test light though.

Let's grab our favorite scope on a rope here. We're going to hook it to battery. Negative: All right, let's make sure this power. Let's just see who's hot and who's not.

So we have one power on the load side. Let's jumper power across that and see if anything changes on our scan tool. All right, there's our flashlight. This one had power jump around that one.

We see that part here. we do and we're gonna jump for this to the other load side. but we did. So we do have power going through it and on scan data nothing changed.

So what's that? Tell us? I don't know I don't know my guy. Let's see I just want to reach down here. let's see if we have how we're going through this relay. We don't part on that side.

no power going through the relay. So this is kind of interesting. Why is it relay not being turned on? The key is on. but I don't have any power on this control side either.

which I'm not super concerned with because of the fact that when we jumper the load side nothing changes on scan data unless you know I Guess the only thing would be is if our scan date is no good. you know if the state is not live or this Pids doesn't update correctly. It's interesting that it's at 3.6 Um, so that's kind of bizarre. Let me do a little more looking.

let's see where these wires go. I am curious that there's no no control side here, but it doesn't show that side of the relay being hooked up either in the wiring diagram. So I don't want to get lettuce straight from my lack of understanding of how this system works. So I'm going to do a little more poke in here, but it is quite interesting that we can jumper power right straight across to the you know to the load side of that relay.

3.6 I Want to go and I want to see if there's a either one of these light up and it does. So let me just see. let's shut the key off and see if this is a control for that relay. even though it doesn't show it in a wiring diagram.

let me Shut the key off and see if that round side switch control wire changes. Okay, because that would give us a clue. Um, let's see. so that's key off.

Yep, so key off that stayed lit. It's key on, no change. so that's pretty interesting. One side of the relay that has a constant ground.

so that makes me think that if there was a control it would be power side switched. which we don't have any. You know, any action going on there. So pretty interesting folks.

Let me do a little more poking, come up with a plan and then we'll execute the plan. So this really makes me concerned because if the wire diagram is Right a standard relay won't work. here. in the diagram, it says it's a shunt.

Um, you know here to say this is ATM cont, which I don't know if that just means continuous um or control of that transmission control relay. but if if like I say if the diagram is correct, a standard relay here will not work. What we've done will work, but a standard relay won't. Um.

and all of these relays are the same except for this one here for the wipers, which is different in the sense that it's a three pin on it. It's got. you know, your 87a terminal. Uh, and there's three pins here in the Box for that.

So I assume that's right, but all of these part numbers are the same now. It doesn't mean they're right, it just means they're all the same. Uh, you know. Being that this car was bought with a problem, these are all covered with greasy fingerprints.

Perhaps somebody's been at the salvage yard, you know, swapping stuff around I Think for our purposes, we're going to read I'm going to reinstall this here and we're going to check for voltage I Don't think I'm going to get too sidetracked. Uh, hopefully we're gonna check for Volt. This voltage is supposed to be making it to the PCM There's two wires that are supposed to be hot whether this is controlled or not. When we bypass this and jumper it, our voltage on the scan tool doesn't change.

it stays at 3.6 If our voltage is making it to the PCM the PCM is bad and we need to figure out what really goes here. Whether it is a shunt or which I don't understand or if it is looking at the diagram, just simply a bypass. Which is kind of bizarre. Why even have the relay there if it has no control wires to it? Uh, that I don't completely understand because service data did allude to the fact that it it monitors.

you know Kion kioff voltage. Um, perhaps I didn't check to see if this voltage. Let's see if this voltage goes away. Kion off key on key off.

Usually these load sides don't but let's just see, we'll stick our test light there. Let me go turn the key off and see if that moves away. I Can't imagine that it will. So yeah, so that's key off.

like I say that's just constant power. Pretty interesting still. Um I'm gonna find us some I kind of just want to grab that computer he's got in there. just plug the dang thing in and see if all of a sudden our scandinated changes that's probably a little easier than testing I assume somebody would have done that already.

The the connectors right here. uh, as silly as a video as that would make if it worked, It may just lead us right in the right direction and save us from tracing out wires. So that's let's just do that. What the heck? Keys Off Now I'm usually not a big swaptronix guy, but when our Theory looks like it's lining up with a possible the possibility of having a bad PCM and you have a PCM in your hands even though I don't know security and stuff on these I Don't think these older Keys you could write the the number to it on a used one, so it's likely this one won't work anyways without sending it and getting it repaired eprom swapped.

let me just turn the key on. we'll just look at the voltage. That'd be the easiest thing junk here. Go back to skin Data.

Let's see. let's just see. Bam Lucky. Guess so.

Oh son. 13.5 So there we have a bad computer. The customer actually had one in the car. It's great whether or not you know with a car run with it.

I I Don't know. Let's just see. uh, see what it has for codes here. No codes in the training so that's good.

So the wiring diagram is right and technically if we go back to live data, let's just see if we're right. So let's just do just this one show. Selected: 13.5 If we pull the pin, look at that. it goes to 3.3 and it should have the code in it now.

It's continually monitored. Bam, look at that P0880. But if we put this relay in, it should still have the code in it and our voltage should still be the same because that's the wrong part. I'm thinking let's go to live data.

Yeah, look. 3.3 volts. That's a that's the wrong part folks. This: this doesn't belong in this car.

it does just not in this hole. it has to have some kind of shunt or just some kind of bike. because when we do it like we do it on a Discovery Channel Let's see there it is. Oh so that's kind of interesting.

a jumper power to it. So we're learning something I jump for power to it. but look, it's still at 3.5 Do we need to erase the trouble? Code: Let's erase the code 's gone. Go back to live data.

Ah, look at that. So we learned something. 13.5 Let's put the other PCM in. If this guy got screwed because it's got the wrong relay, that's gonna suck.

So I would not have guessed that I Would not have guessed that once you generate a code, it kills that data pit. Does that make sense to you? So 3.3 volts right now again, we jump our power to it. It stays at 3.5 volts until we actually clear the code. I wouldn't I wouldn't have known that.

That's pretty interesting. Usually that stuff's live, but this is why we poke and hope sometimes we learn things. Go back. Go back to live data.

Roberts Your mother's brother, we're back at Thirteen Five. Let me Shut the key off we'll install jump inside to install the original PCM clear the code jumper power and see if this guy just got screwed from having the wrong relay. If that's the case, we may have to take us a little trip down to Wilbert's we don't have any Hyundai dealers close by and something like this. It must be just as easy just to run down the junkyard only a mile down the road.

so they probably have these cars. The key is back on. Let's jumper our power to it. Wham Bam! let's go to trouble Codes: This is the original.

PCM We're gonna erase this code I'm gonna reread it Oh See now it's still active in this car so that's pretty interesting. We erase it. we have power going to it Kion Engine off Erase it. We go to live data and this one's still at 3.6 so that's pretty interesting.

This computer is junk. Computer is no good, but it still has the wrong stinking relay. Well that's pretty wild. What are the odds of that it's got the wrong relay and the computer is actually bad.

But when we use the computer that works, you have to clear the code to get it to uh to read that. So interesting, so interesting fix. Uh, I'm gonna check with Keith L1 Auto diag I Don't believe that we can just put a PCM in this because we won't be able to rewrite the bin. I'll likely have to send him both of these computers the last Kia that we had in here or Hyundai that's what we did.

We sent him the computer. he did a eprom swap or swapped over whatever needed to be swapped over to get the bin in there. I Guess we can I Guess we can double check that. I can just put it back in and we can go into ECM I Believe it only allows you to write the bin one time even though there's a function in here.

Yeah, like right then. Uh, right? Then he said memories Po 630 I'll try to do it, but I'm pretty sure you can't do it or you can do it just one time on a new one. So stand by folks. Uh, pretty interesting.

I'm glad I brought you guys along to see this so that is the case. It reads the VIN that is currently in the PCM and just tells you that the VIN is already written. so this is the VIN for that PCM Although the car will start and run because as we all know, these, Hyundai's like to disappear around here. There's no security so the car will start and running.

We won't have the 880 actually. I should be able to start it. Let me just see contact so that's good. It does start and run unfortunately.

even though it doesn't have a check engine light, let me just verify this. It's not going to have any mismatched. Vin You know, check engine light in the engine controller. Okay, even though that uh, he'll get popped during inspection, so it'll come in, we plug it in.

That shop will get audited for sure because it's going to show one Vin scan that doesn't match the VIN that they plugged it into. You can bet your bottom dollar the state will be at your shop the next day looking to destroy your business. So that's what they like to do. Uh yeah.

so I guess we're done folks. Uh, perhaps we can run down to Wilbert's let's get the right relay for it and then at that point it's up to him. he can drive it with that thing until while the inspections do because he's only got a 10-day on it. So that's uh, that's up to him.

I'm gonna give Keith a call L1 see what he charges to do that that way I can tell the customer uh, what's going to need to be done. but I just rescanned it and you can see no codes in the engine. no codes in training right? We leave that sucker in there. so uh, let me look see if Wilbert has one and we'll either end the video or take a little road trip.

That's what I love about this place. They've got this little guy here. that one's an 0-9 You go right on your website you look they got it so sorted Now it's freaking awesome. So they got an 06 and a 09 row 14.

Let's go boys. here we go folks. we've got our list. We also gotta look for an old Chevy So we're gonna walk down these Chevy rows.

My guy Josh is working on an oldie but a goodie. an old one. We need the Uh says all my stuff we looking at there boy um he needs a brake. Hose bracket is all.

this body's down here, but it's a 2500. Oh that break hose bracket's missing too. Maybe it's going to be a little more difficult than I thought, but I'm gonna check out these old junk. Chevys As we're walking by, we got to the Hyundai section.

Foreign guys out there for a minute casualties so that's good. This might be what Josh needs. This is the old one. body style.

a big money, big money. Oh there it is. That's what we need right there. Foreign Josh needed this bracket.

That was it. So this place has A gold mine for stuff like this. little petty things. This is a Sonata which has been picked over.

Pretty good. Real good. bingo. Bingo.

look at that. It's the brown one. Feels pretty light. It's awesome.

I got it. Awesome. I've gotta know I've got to know. Do you guys want to know? I'm betting it's nothing but a jump.

It's not even it's it Ain't nothing. It ain't nothing but a jump wire in a box. You have to look at my nasty fingernails. I didn't bring any gloves to save you this time.

Look at that. See you. Ding Dongs now my finger. I'll move it so you don't have to look at it.

It's nothing. It is nothing on the control side and on the load side it is nothing more than a jump wire. What's this thing cost? Brand new 10 cents. so that's all it is.

Of course no I had to kind of get it so it sticks back together here. But isn't that good to know that? Really, it's nothing more than a jump wire in a box. It's an empty relay. Remove our jump wire, install their jump wire.

So this is, uh, let this be a lesson to you folks. if um, if you're playing swaptronics with relays, you know Mcdarn's sure. you know what's going in what hole and you know how that really works. Whether it's you know, diode, suppressed, or in this case, a jumper wire where even though it looks like a regular relay, they could have done themselves some Justice by whacking off the two control pins.

perhaps. but you know, somebody probably went to the junkyard just uh, it's just a relay. It's a relay. It's a relay.

That's what the old saying is. but uh, we're at the point where now he just needs to make a decision. Um, he can run it with this ECM of course it won't pass inspection in New York even if the lights out or Keith did get back to me I Want auto diagnostics? Check him out on YouTube Uh, he can change the VIN over if I send them both computers. So I'm not gonna say what he charges to do that because I it's not my business to do so.

Um, but he's done these for me before he did a Hyundai before. Uh I See, this one's got a broken mounting tab on it there, so I'll leave it up to the customer at this point what they want to do if they want to get a new PCM right in the bin to it. or if they want to send us one in sending it in it's cheaper. it would only make sense.

so that's that. Anyhow, we're done folks. So I guess that's it folks. I Hope you enjoyed this fix so the speaker at least going down the path to find out what the heck's wrong and the fact that yeah, we can believe our service data.

I'm not sure I would go as far as calling that a shunt as I would just a non-existent relay or a bypass, but that's essentially what the the diagram showed also. but then it was a little confusing to know that there's actually wires in the Box in that control side. or there's at least a ground, uh, no power side switch. but maybe it's wired up for a different application and then they use the same box.

but uh, so Lessons Learned here. Hey, you can't swap in a used PCM or you can. but if your state has inspections, you're in trouble. But other than that, they're you know, Plug and Play providing the numbers are the same can be.

Don't just go swapping relays because not all relays are made the same. So make sure you know what you're swapping in there and see I Love the Pick and Pull. It's a fun place to go. We got to help a guy out get a box off his Chevy truck and we've got to get the part for Josh and get this and that we're still well within our time limit.

Why don't you guys not waste any more Your time going in. that comment section questions Comments: the NC the Facebook You know where to find us and just remember viewers. If I can do it, you can do it. Thanks for watching.