WANTED Please Lexus LS400 engine control ecu 89661-50250

[Glider]

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

[steve2006]

Looks like that part number is specific for the 95-97 LS400, you could ask on the LOC Facebook page.

[Glider]

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

[Glider]

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

[Stupot]

15 hours ago, Glider said:

nobody seems to be able to repair it

What issues are you experiencing? 

[Glider]

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: 

89661-50221 Mine is 89661-50250 The  89661-50221 works perfect or seems to, until I kick down, the car pauses then lurches forward at speed in a strange manor, and I can not get the diagnostic side to work. but just drives great until I stick the pedal to the metal, no speedometer problems and smooth gear changing up and down the box. but I want it all to work in the correct manor so have now been searching for an ECU with the right part number 89661-50250 ANYONE OUT THERE GOT ONE or LSCowboy says it can be 89661-50251 50252 50253 50254 50255 50256 50257 50258 50259 and if it has 84 onthe end of that thats fine too but to be honest I have looked everywhere and there are none around at all ANYBODY GOT ANY IDEAS?? Thanks in advance Phil Glider

 

[Stupot]

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

[cruisermark]

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

[Malc]

7 minutes ago, cruisermark said:

these guys appear to have one in stock

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

[cruisermark]

I think used is best and most cost effective option 

A new one on Amayama is £1600

[Glider]

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 

[Glider]

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

[Glider]

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 

[Glider]

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

[Glider]

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

[Glider]

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

Edited May 17, 2019 by Glider
spelling correction of heading

[Stupot]

16 hours ago, Glider said:

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

The exhaust blow might be part of your EML problems... getting codes read may help. I got my ECU capacitors changed by a local electrical engineer... he knew his stuff. I supplied the capacitors. I think he operates a post and return service, his website says diesel, but he was happy to fix my LS ECU, might be worth contacting him as probably quicker and cheaper than LS Cowboy... https://www.dieselecurepairs.co.uk/

[Glider]

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

 

[cruisermark]

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

[Malc]

Phil, I think you are a bit of a star tbh ....... my same car is thus far totally trouble free in the ECU department ....  and I hope it stays that way forever 😉

But if it starts to play up I know that I can rely on your fantastic research to guide me out of trouble.

A big big Thank You ........  from me anyway

Malc

[Glider]

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

Phil

 

[Glider]

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

 

[steve2006]

Great result and thanks for the update, not too long ago these cars were found in scrapyards....but not anymore. 

[Glider]

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

 

[Glider]

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.