Yaris ECU broken??!!!!!!

[phb10186]

Hi Guys,

I used the forum before, but out of courtecy, I will reintroduce myself...

My name is Ben, I have a 2004 1.4 D4D Yaris T-Spirit in black with 57K on the clock. It has not missed a beat since I have owned it from 13,000 miles. I love it, the only faults I have to report are that long journeys give me backache (but I usually use my Accord for them), and the airbox occassionally needs a clean. Despite this, it is a great car in every way, and I manage about 55mpg on the average mix.

I would give myself a 7-8 with practicality and mechanical ability. I usually know what is going on car-wise.

So, I am actually posting on behalf of my ex girlfriend's car. She has a 2005 1.0 auto pertol, and lives in Greece now. I am just helping out here, as she seems to be desperate (no pun intended)!

I got an email saying that the ECU has gone, and can I source a new one. I told her to ensure 100% that it is the ECU at fault, and eliminate the following:

Immobiliser
Coil and spark
Fuel pump and relay
Earthing points
All other electrical connections there.

I know that ECU's can blow, but this is normally due to their manipulation with the battery still connected, and that if you don't sort the issue, you can get another one and blow it straight away - if it is an earthing issue for example.

For this reason my general advice was to verify that the ECU has failed, and that the cause has been fixed. If not take it to Toyota, and let them have the joy, as they have to fix and warranty the repair.





... anyway, in the mean time, I am researching this, and I just wanted to pick the combined brains of the forum, as to the relative occurance of an ECU failure on a Yaris - my guess is that it's rare to unheared of. I have never had, or known any natural ECU failure on a Jap car... but there might be a model-specific issue that may make it more common.

I wouls also be grateful for the folloeing advice:

1. Is the ECU coded in any way?
2. What is the general compatibility (I have a part number of: 8953052090)?
3. What is the liklihood of it's failure, and if ~0%, what is the likely cause?
4. Where is the best place to get one.... and specific Toyota or Yaris specialist breakers?

I know that I can only help to a certain degree as the car is not here, but the help will be appreciated by all, so many thanks in advance.


P.S, great forum here, you have a catalogue of good info.

[firemachine69]

If she can turn over the key, and get dash lights, the ECU is not gone.


Tell her to bring it to a dealer, I don't think she has a clue what she's talking about.

[phb10186]

If she can turn over the key, and get dash lights, the ECU is not gone.


Tell her to bring it to a dealer, I don't think she has a clue what she's talking about.

She definately doesn't know what's what, she is just relaying what her mechanic told her.

[firemachine69]

Tell her to try another dealer.


Of course, if she can't turn over the key and get dash lights (regardless if she can start the car), it is a possible culprit. Beware of dirty mechanics that like to blame the ECU when they really can't properly diagnose the car. It's become a real problem in North America, and I doubt much is different in EU.

[CTScott]

I wouls also be grateful for the folloeing advice:

1. Is the ECU coded in any way?
2. What is the general compatibility (I have a part number of: 8953052090)?
3. What is the liklihood of it's failure, and if ~0%, what is the likely cause?
4. Where is the best place to get one.... and specific Toyota or Yaris specialist breakers?


1. The Yaris ECUs are specific to the engine/transmission of the car.

2. That part number is for the Transmission Control ECU, not the ECM. That would be the ECU for the 5 speed sequential shift transmission.

What is the problem that she is having with the car?

[IllusionX]

What really suck is that most of us (in North America) have a 1.5L petrol engine, and pretty much all of us would LOVE go have a D4D. Heck, even a 1.0L for some 50+ imp MPG would be great.

sorry, i couldn't help at all, i just _had_ to put this comment..

[phb10186]

What really suck is that most of us (in North America) have a 1.5L petrol engine, and pretty much all of us would LOVE go have a D4D. Heck, even a 1.0L for some 50+ imp MPG would be great.

sorry, i couldn't help at all, i just _had_ to put this comment..


Well, I tried all the Yari available, and the 1.4 D4D was easily the the best. It has more midrange acceleration than my 2.3 Accord!

The 1.0 is pants - really, no power, the 1.3 is good, and the 1.5 Tsport even better.

But the 1.4 diesel is great, and works so well... you can get 70Mpg out of it at 65 on the highway if you are careful! I have been half way up the UK (300 miles) and only used 3 bars from top of fuel.

[Yaris Hilton]

I think that's the reason we can't get it in the U.S. People would make unfavorable comparisons between the mileage of a diesel Yaris and the Prius.

[phb10186]

I think that's the reason we can't get it in the U.S. People would make unfavorable comparisons between the mileage of a diesel Yaris and the Prius.


The diesel Yaris does better highway miles than the Prius, but the Prius will do better urban miles.

North Americahas totally missed out on the diesel revolution that has occured in Europe. Diesel is so much better than petrol for everything other than flat out speed.

Diesels of late are far better than those of the past, and the Toyota and Honda units are very petrol-like.

The new Accord-sized TDI vehicles on sale in Europe usually have 1.9-2.4 litre TDI's, and can easily manage 45MPG, but on a run can do 55MPG.

That must be the way forward.

Just remember I am talking Imperial 4.5 litre galons, not US 3.9 ones!

[phb10186]

OK, back to the original question...

I am talking about a 2005 1.0 litre automatic Yaris here (man that must be slow)...

... do we have a separate ECU for the gearbox and engine, or just one.

I know the manuals only have one.


.... In addition, could someone please send me some sample part numbers, as I would like a comparison.

MT

Ben

[CTScott]

OK, back to the original question...

I am talking about a 2005 1.0 litre automatic Yaris here (man that must be slow)...

... do we have a separate ECU for the gearbox and engine, or just one.

I know the manuals only have one.


.... In addition, could someone please send me some sample part numbers, as I would like a comparison.

MT

Ben


If it has the sequential shift transmission, then there is a separate ECU for the transmission (part number 89530-52090, as you posted above). Otherwise if it has the basic automatic transmission, then there is not a separate ECU for the tranny.

The ECM part number would be 89661-nnnnn, where the second part could be 0D180, 0D190, 0d090, 0D091, etc.

If you can give me the VIN for the car (you can PM it to me if you don't want to post it), I can look up what part number is actually in it.

[bronsin]

I think that's the reason we can't get it in the U.S. People would make unfavorable comparisons between the mileage of a diesel Yaris and the Prius.


As I understand it they dont sell as many hybrids in Europe as in the US. In Europe the diesle is the thing. Which is pretty crazy because they cost like a Prius and never recover the additional cost of ownership.

[phb10186]

As I understand it they dont sell as many hybrids in Europe as in the US. In Europe the diesle is the thing. Which is pretty crazy because they cost like a Prius and never recover the additional cost of ownership.


They sell loads of hybrids in the UK, especially around London, where I live, as all vehicles have to pay £8 to enter the city centre, but hybrids are exempt.

Diesel is almost as efficient as a hybrid, has no batteries to go wrong, and has loads more torque, and are better to drive.

I guess the muffler emissions are cleaner from a petrol engine.

Whenever I am in the US, I am amased that there is no real diesel car scene... better than hybrid for sure IMO

[phb10186]

If it has the sequential shift transmission, then there is a separate ECU for the transmission (part number 89530-52090, as you posted above). Otherwise if it has the basic automatic transmission, then there is not a separate ECU for the tranny.

The ECM part number would be 89661-nnnnn, where the second part could be 0D180, 0D190, 0d090, 0D091, etc.

If you can give me the VIN for the car (you can PM it to me if you don't want to post it), I can look up what part number is actually in it.







Yes it does have the sequential shift auto, so the fact that there is a second ECU checks out. The part number is definately right.

[CTScott]

Yes it does have the sequential shift auto, so the fact that there is a second ECU checks out. The part number is definately right.

OK, so are they saying that the transmission ECU is bad or the main ECM?

[bronsin]

They sell loads of hybrids in the UK, especially around London, where I live, as all vehicles have to pay £8 to enter the city centre, but hybrids are exempt.

Diesel is almost as efficient as a hybrid, has no batteries to go wrong, and has loads more torque, and are better to drive.

I guess the muffler emissions are cleaner from a petrol engine.

Whenever I am in the US, I am amased that there is no real diesel car scene... better than hybrid for sure IMO


They had a piece on NPR about electric cars in London and how they park for free and dont pay to enter the city. Havnt seen an el car here yet.

[Yaris Hilton]

GM put out some lousy Oldsmobiles and Cadillacs with a gasoline V8 converted to Diesel circa 1980. Failed on the market and the GM execs concluded Diesels just wouldn't work in America.

[kenora]

That's one of the reasons GM is sucking the aft teet!
They don't give customers what they want, nor for that matter is Toyota, I would have bought a diesel Yaris in a heartbeat if I could get one.
Hell, Toyota sold diesel pick-ups and Landcruisers in Canada in the 70s and 80s; (I had a 77 Diesel Landcruiser (BJ40)), it was and is the best off-road machine on the planet and still got 35 mpg on the highway.
They couldn't keep them on the lots here, real off roaders all wanted them and the US customers who couldn't get them in their home market came up and cleaned off the Toyota lots here as well.
Anyway Toyota is missing the boat but not bringing their diesels here. and GM missed the boat decades ago being more concerned with the whim of the moment.


OOOOPS getting waaaaaay off topic, sorry!

[auxmike]

GM put out some lousy Oldsmobiles and Cadillacs with a gasoline V8 converted to Diesel circa 1980. Failed on the market and the GM execs concluded Diesels just wouldn't work in America.

Don't forget the Caddy 4-6-8 engine of the same period!:laugh:

[Yaris Hilton]

Oh, I haven't forgotten it. Actually, the idea is sound, it was poorly implemented.

GM had a history of coming up with radical new ideas and putting them into production after limited testing. The buyers were the test drivers. If you bought a GM model in about the third year of production or later, it was probably a good car. Heaven help you if you were an early adopter.

[phb10186]

Oh, I haven't forgotten it. Actually, the idea is sound, it was poorly implemented.

GM had a history of coming up with radical new ideas and putting them into production after limited testing. The buyers were the test drivers. If you bought a GM model in about the third year of production or later, it was probably a good car. Heaven help you if you were an early adopter.


Isn't the Dodge Viper engine an old truck unit that was diesel converted to petrol a long while ago?


... Diesel eill only catch on if there is a financial incentive, and with gad at $3-4 per gallon, there isn't one.

If I lived in the US, I would have a V8 for sure, no point not. Fuel in the UK id about $7-8 per gallon. Sucks.

[phb10186]

OK, so are they saying that the transmission ECU is bad or the main ECM?

Yes, they are saying that the tranny ECU is shot... which I have trouble with... but I did a google search and there are multiple problems with this 1.0 MMT semi-auto system. So much so that... they still make it!

If ECU's are going Toyota should have made a recall, as I would argue that it is a safety issue, as a breakdown is a safety issue.

Toyota want 12,00 Euro's, which is like $1500 or £1000 for the ECU. I have found a guy that has a tranny complete with ECU for £395, but that's no use for me, as I will post the ECU to Grease, and have a surplus tranny.

Actually scrap parts in the UK tend to be pretty cheap... typically £50-100 for any ECU that is not special in any way.

[bronsin]

Isn't the Dodge Viper engine an old truck unit that was diesel converted to petrol a long while ago?


Nope that was a gas V8 modded into a (gas) V10. Yeah here in the US we still run around in V8s. We buy from the Saudi's who then give our $$$$ to the tererorists. Everybodys happy! :thumbup:
I just paid $2.48 a gallon last week!

[Yaris Hilton]

They made a gas V10 truck engine that had the same block but different heads, I think. Dodge's truck Diesel is a straight 6 Cummins.

[phb10186]

So, I managed to get an ECU for this 1.0 MMT Yaris, but the only one I could find came with the gearbox too!

£350 all in - that's like $550, so not on the whole too bad.

The ECU I wanted was: 8953052090, but I got one with the code 8953052100

I think due to the right and left hand drive markets, but I am taking an educated guess that the ECU is the same.

Is it?

... well anyway, the gearbox is really cool - it has three servos on it, and I logically guess that one is to disengage the clutch, while the other is to up-change, and the third the to down-change.

It has a standard clutch plate, and no torque convertor, so I can only assume that it works like a sequential motorbike manual gearbox, but with ECU controlled servo-actuation.

And then I though - well you can get 1.0 motorbikes, so this is basically a 1.0 motorbike powered yaris... well kinda, sorta not.

I was really impressed with the overall quality of this MMT unit, and as a biker myself, it's a pretty interesting piece of kit....

only problem is that sequential boxes arent designed to carry large loads well, so those servo's do a heck of a lot of work... and they are only the size of a childs fist or something.

They want the gearbox sent to them as they are not sure that it isnt coded - but I can't think why it would be - its the compatibility with the engine ECU that I would be concerned with.

Anyway, I was only helping out with this issue because we have good parts and breakers in the UK, and Greece is seemingly devoid of anything here. But it's no different to sending stuff between coasts in the US...

The authorised Toyota dealer in Greece strangely still don't know the issue for sure, and they are willing to fit used parts - work that out, cos I cant!

[CTScott]

So, I managed to get an ECU for this 1.0 MMT Yaris, but the only one I could find came with the gearbox too!

£350 all in - that's like $550, so not on the whole too bad.

The ECU I wanted was: 8953052090, but I got one with the code 8953052100

I think due to the right and left hand drive markets, but I am taking an educated guess that the ECU is the same.

Is it?



89530-52090 is for LHD and 89530-52100 is for RHD. I am not sure what the difference will be between the two. Hopefully it is just a difference in the mounting bracket.

[Yaris Hilton]

And then I though - well you can get 1.0 motorbikes, so this is basically a 1.0 motorbike powered yaris... well kinda, sorta not.

I think the same way about my 1.5 liter 1NZ-FE. Bikes come with engines that big and bigger, Yamaha reportedly designed the engine or at least the head, and it uses a valve adjustment scheme mostly found in motorcycle engines.

Back to the topic of discussion...

[phb10186]

89530-52090 is for LHD and 89530-52100 is for RHD. I am not sure what the difference will be between the two. Hopefully it is just a difference in the mounting bracket.

It was the damn ECU!!!!!!!!!!!!!!!!!!!!!!

It cost me £15 to send the ECU from the UK to Greece, and £110 to send the gearbox, which they wanted before even trying the ECU.

Anyway the RHD ECU worked fine in the LHD car... so it was just the mounting bracket!

Damn, ECU failure.... shame on you Toyota - wouldn't happen in a Honda!

[Yaris Hilton]

Glad you got it fixed!

[dushanm]

hello guys

i have a Yaris t1 5dr air-con .. want to install 17'' mags is it a good idea? as per the engine size? and mechanical parts etc

[127.0.0.1]

hello guys

i have a Yaris t1 5dr air-con .. want to install 17'' mags is it a good idea? as per the engine size? and mechanical parts etc

wrong thread. start a new thread in suspension forum.