UA5_Alanh

Hi i recently did an av6 swap everything went good. Switched all the sensors and the oil cooler/ filter setup. After the swap my car went into limpmode no cel but when key is turned to 2 before start, cel blinks 5 times for miss fire. I replaced all spark plugs and coil packs. Still same problem. I recently limped it to Orilleys to get it scanned anyways. They ran it with a bosh scanner and it came up ecm and pcm failure. Any ideas? I know its ecu related. I already dumped $1300 into this car

UA5_Alanh

I have tried to reset the ecu still having the same problem. I need help!

Skirmich

I think you might have shorted somewhere... First time I've seen a ECU Failure with an AV6 swap, That's perhaps why there aren't many members chiming in.. This is not normal... If the ECU has failed there isn't much to do but replace it.

UA5_Alanh

Ok this happened before hand also. Was driving on the freeway then all of a sudden cel and abs light came on. Thought it was transmission cause the previous night before i smelled burnt transmission fluid. I also been reasearching and i notice people had the same sysmptons as me where there cars in limp mode with vsa and abs light on. They said it could be the APP senson.

UA5_Alanh

Sensor*

Skirmich

Sensor yes but you said that the code-reader came up with "ECU Failure". Now it did or it didn't?

What is an "APP Sensor"?

Skirmich

I edited^ My last comment.

UA5_Alanh

On the obd2 bosh reader it came up ecm pcm malfunction. It didn't give me a code exact code, just told me that theres a malfunction in between the two.

UA5_Alanh

App sensor the accelerator pedal position sensor.

MBP 03

These cars are not drive by wire, so there is no such thing as an accelerator pedal position sensor. Maybe he meant the TPS?

UA5_Alanh

Is it the tps? I have a 02 type s.

Skirmich

Yeah there isn't an APP on the 2G.. We do have a TPS though..


ECU = PCM = SAME THING
So if the bosh reader says the ECU has failed there isn't much to it, The OBDII reader port connects directly to the ECU so anything you did for the AV6 Swap didn't affect it.

UA5_Alanh

Ok that narrows it down to the two. Im gonna replace the tps and the ecu and go from there. Is there any reprogramming need for the new ecu?

Skirmich

You need a new key since the ECU uses a different transponder for the key chip.


Our TPS isn't replaceable though (The bolts are hard pressed into the Throttle Body).. There was a mod involved to re-trofit an aftermarket TPS but it wasn't easy.. Are you sure you need a new TPS?

UA5_Alanh

Well i read up other people problems that had the same sysmptons. I was driving going 60 then cel light came on vsa and abs came on. It wouldnt rev past 3500 rpm. I thought it was the transmisson know my car has 203k on it. So i replaced that with a av6 and still the same problems

Chojun

Have you tried pulling codes yet? I did a quick scan and didn't see any codes here. That might be helpful.

UA5_Alanh

Yes I had orilleys do it with their bosh obd2 reader. They couldnt give me an exact code but it said ecm/pcm failure

musiclevelz5

Wait a minute, before you swapped the trans, you guessed it was a trans problem? What were the codes you got on the highway with the original trans? Was the D5 light blinking? That seems weird you would replace the trans without knowing for sure if its a trans issue. Yes it could be a tps problem but then again the light will tell you.

UA5_Alanh

Unfortunately yes i thought it was the transmission. So i replaced it anyways cause of the mileage of the car (203k) and When the problem occured on the freeway i was in the process of hitting vtec. The cel light Abs and the vsa all came on. By the time i went to go read the ccodes the cel light went away. I still went to auto zone to check the code and they had a cheap scanner and nothinf came up. I limped the car home and when i would half throttle, it would feel like its in launch control and the transmission was slipping. Thats the main reason why i thought it was the transmission. So after doing the av6 swap i thought it would fix the problem which it didnt. So after i thought it was just miss firing because when i put the key to the 2nd, cel would blink 5 times then go away. So i went ahead and replace all coil packs and plugs. Still not fixed. So i finnaly went to orilleys cause they had a better scanner and it came up ecm/pcm malfuction. They tried to print me a data sheet but the said its an uncommon code. And now im here asking you guys fo help. And no d5 wasnt flashing when cel and abs vsa came on. But it does light up when im about to start the car. Ive worked on plenty of swapped civics and integras. Im really stumped at this point.

musiclevelz5

I would find out first if your TPS is bad because that is a common problem you described when the tps has an issue.

You can easily test the tps to see if there's a dead spot somewhere inside. Take a DMM with the key on ignition and connect the positive lead to the middle pin which is the readout and the negative lead to the negative on the tps. Get some T pins as it helps to backprobe the connector. I believe with throttle closed it should read around .5V or half a volt. and at WOT it should read 4.5V or four and a half volts. Watch the DMM as you gently move the throttle from closed all the way to wot and vice versa. It should be smooth increase/decrease in Volts. If theres a dead spot you will notice it.

If the tps is bad you need to buy a whole throttle body sub assembly in which a new tps comes with it. 16410-P8E-A02 That is the number for the TB.

UA5_Alanh

Can i just cut slits on the pressed bolts and replace it like that? Ive done it on plenty b series motors. I mean if i have to ill spend the extra money to buy the whole thing but is it necessary?

UA5_Alanh

Heres a link to a video of whats occuring if that helps

Limp mode no cel acura tl 2002:
And ive noticed the other throttle body ( I dont know the cprrect name ) doesnt move at all it just stays open even when car off or gasing it

Skirmich

^ Its the VSA Throttle Body (For the traction control) and nope that throttle body should close up when you lose traction, It stays open at all times.


Its weird because VSA + (!) usually comes up with Check Engine Light. Yours have no code which could lead to a toasted ECU.

UA5_Alanh

Yes at first it came on with a check engine light then it wenr away after a couple hours. I shoukd have gotten it checked then. The last thing i wanna do is drop it off at a shop cause i like to save money. But if worst comes to worst im gonna have too

musiclevelz5

Its possible there's codes still stored in the ECM. Have you tried pulling them with a good reader?

UA5_Alanh

I went to orielly and they had the bosh one. Im dropping off the car at an acura specialist tomorrow.

UA5_Alanh

UPDATE: they said they couldn't work on my car because someone put in a extra throttle body lol the one that skrimich said is for VSA. On to the next shop we go.

UA5_Alanh

Also while driving SRS light came on and noticed in D5 would dim then light back up

musiclevelz5

The vsa tb is standard on all type s TLs and should not inhibit a shop from workimg on the car. Maybe they are not really Acura specialists as they would know this. Do you know the procedure to turn your srs light off? It is really simple to do. The D5 light dimming could indicate a bad ground somewhere?

UA5_Alanh

Thats why i laughed when the said "someone custom added another TB to your car" and no i dont know how to turn it off. Also it might be a bad ground. Maybe when i did the av6 swap i didnt put the grounds in the right spot

ErickUa5

Are you sure you tighten up the ground bolt on the thermostat, Thats the main ground for the ECU.

UA5_Alanh

Yeah i did but i feep like i didnt put it back in the proper spot. I put it threw the left side bolt of the thermostat. And you know how there is two grounds to the negative on the battery? One goes to the frame or do both?

ErickUa5

From the battery one goes to the frame the other to the trans.

Skirmich

LOL!!! someone added a second throttle body?? what a miraculous a professional work they done!! Seems that shop isn't really an Acura specialist since they didn't know about the VSA TB.. I Know 3rd Gens use the DBW TB to act as the VSA TB but CMON!!!! That Second throttle body was specific to ACURA TL TYPE-S! If they don't know about it they know jack shit about Acuras.