Really happy for you, now you can enjoy again

Kind regards

Phil

No problem, as long as your happy thats all that matters, good luck I am sure it will be fine

All the very best

Phil

PS please let me know that all is well

First off I made this contact on Lexstreme you can follow the conversation by following the link below

https://www.lextreme.com/forums/index.php?threads/help-need-another-engine-ecu.17506/#post-145212

This guy is great, knows a lot about LS 4s Celsiors ECUs and more.  

I am just doing some homework for you, and I will get back to you ASAP tonight.

Also need to PM you but have never done it on this site, for your address etc so I can send you the spare ECUs I have

Cheers

Phil

When you looked inside did you count how many Capacitors it had

Yes lets hope they can fix yours. I only found out my board was damaged after having new caps fitted and the car ran the same as before, its all trial and error, I think I have an ECU for a 94 in the shed, I could send it to you and you could try it, if you wish.

In the meantime I will continue to look for the right one for you, looks like its a rare one like mine

Regards

Phil

Hi before you pay hundreds of pounds for an ECU or repair, send it to me I have spare Capacitors. and I will get my man to solder in a complete new set for you, for £50 Inclusive of parts just need to add postage cost.

If its like my original one and the board is damaged, the repair will not be possible, but really worth a look. up to you but the offer is there.

Whats your ECU No. 89661-?????

and I will have a look for an ECU for you too. I know how difficult it is 

Regards

Phil  

OK Guys n Gals,

Have managed to purchase an ECU with the correct part number 89661 50250

Got it for £45.00 + PP £10 had all caps done, £25.00, now my ole 95 LS running perfect, love it, love it, love it, been a long time coming but got there in the end, searched the four corners of the world for this, in the end it came from Southampton.......typical lol.

Thanks again everybody for all your help and input really appreciated.

Both ECUs are working:

89661-50380

89661-50241

had all capacitors changed cost £60

These were used as a replacement for 89661-50250 as I cannot locate one anywhere.

Never know this may help somebody at a later date

Cheers all and thanks again for your help, be back soon with my next problem lol

2 hours ago, cruisermark said:

thanks for the write up and glad you got it sported in the end.

Your post reminds of a member who had a misfire on his 400 and he spent many months and money trying to sort with without success - in the end it turned out to be a clamp on one of the fuel lines -  a happy ending just like yours

Yes these things happen, I remember visiting my mate who was a mechanic he could not get the brake lights working on a car he tried earthing, bulbs the switch on the pedal, fuses and so on and had his mate in the the car pushing the pedal, trouble was they did not have the ignition on lol

Cheers

Thank you Malcom appreciated lets hope you never get the same problem, happy driving

Phil

Well guys and gals, here is an update for you,

have been trawling the internet for a few months now, reading up on lots of things on different websites, and found something that might help others in the future, as you know I want an ECU with the part number 89661-50250 but have been unable to locate one a write up I was reading said something about an ECU they had tried on a car conversion using a 1995 LS 400 engine, they tried ECU 89661- 50380, I found a guy on eBay selling one in the United Arab Emirates, so asked him to open it up and take pictures of the layout of the capacitors and board,

He did, and emailed them to me, I then compared the layout to mine, it had 9 caps in exactly the same position as mine, then I compared other components and apart from a couple of extras on his they were identical, so I purchased it for $40, it came today and I eagerly fitted it, I turned the ignition on and let it load and off again for a moment then prayed it would start as I turned the key all the way, it started straight away, so I let her warm up for ten minutes and took her for a test drive, everything works great I am over the moon no warning lights goes like the clappers and glides like a dream.

I have also found a Japanese import ECU 89661-50241 in America it had photos of the internals of the ECU and again had 9 caps and exactly the same layout as 50380.

I have purchased it, and am waiting delivery, so again will update you if it works or not.

Just thought the information may help someone else in the future, as I was getting to the point where I thought I would have to break my lovely Lexus  and now I dont,

Conclusion

Needed ECU 89661-50250 the correct one for the car

Used to get by on ECU 89661-50221 ( good for just cruising around with engine light on) only 6 caps on this one but car was running fine

Working completely ECU 89661-50380

To be tested ECU 89661-50241 and will update you on the results

Also bear in mind My LS400 has no alarm I had to have it bypassed to start the car when purchasing, the guy who owned it passed away and it stood for 3 years in his garage.

hope this helps someone else, as gives you more options  

Kind regards all

Phil

Just want to say thanks to everyone for there input and help in this matter, I will update when I have fitted the used one I purchased, then I need to get my Exhaust sorted as its blowing from the front joints both sides just before the mid section, or was, as I have put some paste in for now whilst I deal with the ECU, cheers guys

41 minutes ago, cruisermark said:

I think used is best and most cost effective option 

A new one on Amayama is £1600

Thats the way im going anyway "Used" Cheers

47 minutes ago, Malc said:

but it is a " used " item and no indication of it's work ethic .............  you might be lucky and find it's perfection in operation 😎

Malc

Yes Malc all down to luck, I have bought 2 x second hand ones now just yesterday, But, they are likely to have the same problems as many of us get, although I plan on having the capacitors changed in one by LS Cowboy from lexus owners .com or is there anyone who does it in the UK I wonder?

Anyway I have sent private messages to LS Cowboy and he seems to be the top man, thanks for your input appreciated

55 minutes ago, cruisermark said:

I just googled the part number and these guys appear to have one in stock

https://www.excelparts.co.uk/product/1952/lexus-ls400-engine-control-unit-ecu-89661-50250-4-speed-automatic-4-0-i-4000-cc-1uz-fe-1uzfe.html

Yes been trying this one for a few months, I can get no answers, I have purchased one now, just hoping its ok and works 

2 hours ago, Stupot said:

Good that your replacement ECU mostly works. Only a thought, but maybe the capacitors in your replacement ECU need replacing? 

Yes true, its a game of self belief lol or hope

2 hours ago, Stupot said:

Good that your replacement ECU mostly works. Only a thought, but maybe the capacitors in your replacement ECU need replacing? 

Yes it is, But I do hate the engine management light glaring at me lol 

Hi Stu,

Issues are, a flickering speedometer needle, it bounces up and down, this confuses the gearbox and it doesnt know what gear its supposed to be in, so if I pull up at the traffic lights it will stay in 3rd or 2nd, or if I kick down it goes between 2nd and 3rd over and over. This happens when the car is first started for 20-30 mins and then all of a sudden it starts to drive as normal.

How do I know its the ECU for sure?

I have purchased another ECU with the wrong part number which is: 

Still no luck, nobody seems to be able to repair it either FLUMMOXED!!!

Ok posted on face book thanks for your help, lets see what happens

Hi All,

Been searching for an ECU,for some time now

Lexus ls400 engine control ecu 89661-50250

 have replaced all capacitors as instructed in my ECU but still having small niggles, so, want to try another ECU.

Can anyone tell me if there are any compatible ECUs/part numbers that I may use 89661- ?????, my immobilizer has been bypassed, thanks for any help, appreciated

Regards

Phil

Hi everybody,

checked fault codes on my LS after some electrical repairs, it came up with 3, so cleared them, and took the car for a 20 mile drive, then checked again, I have 1 fault code 21 main lamda sensor left bank (or oxygen) i then checked out what issues I might get because of this, and or symptoms, which were engine check light on rough running on idle and funny smells.....well I have none of these, has anyone else experienced  the same please, 

Many thanks

Phil

PS I will change the sensor just in case

On 3/19/2019 at 9:17 PM, Connoisseur said:

The white wire with black line on a Lexus is usually a ground/earth connector...........

hth

Great thanks

Phil

On 3/20/2019 at 12:01 PM, BachelorDays said:

Looks like you found the issue. Good idea to discuss with an auto electrician. Probably an old tracker installation crudely removed.

Your right, I found the problem ever since I took the scotch locks off its driven perfectly every day no problem at all, the 2 scotch locks provided a live and earth to after market reversing sensors which didnt work correctly anyway, this was sending signals to the ECU and confusing it. So my assumption of someone adding something to the vehicle was correct and this was confirmed by my auto electrician.

Thanks so much to everybody who tried to help,

kindest regards

Phil

On 3/20/2019 at 5:29 PM, steve2006 said:

If the ECT light is flashing I would get a diagnostic check performed to see if there are any stored fault codes which may help you locate the problem.

The speedometer is normally fed from one of the 2 speed sensors mounted on the transmission so it may also be worth checking the plug  connections and wiring to these also.

I have replaced the speed sensors and its OBD1 not 2

many thanks though

regards

phil