Notices
LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Help with speedo and trans issues

Thread Tools
 
Search this Thread
 
Old Jul 26, 2016 | 06:23 PM
  #31  
Yamae's Avatar
Yamae
CL Community Team
10 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2011
Posts: 4,172
Likes: 1,006
From: Japan
Default

Originally Posted by avhart
Hi, simple question

Could anyone here tell me if I can replace my 89661-50170 with the 89661-50171? If I read the post right it should work but since I would be actually spending money to acquire the other part (50171) I really would like some additional comfort if at all possible

Thanks in advance
Yes, if it's for a Celsior manufactured between August 92 - Oct 94. But remember that those QAS capacitors are already at the end of the life and those are mostly needed to replace.
Reply
Old Jul 27, 2016 | 06:41 AM
  #32  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

I very much appreciate this, Yamae. I'll go ahead and make the purchase. Thank you
Reply
Old Aug 23, 2016 | 07:30 AM
  #33  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

Hi Yamae, well I bought the 89661-50171 from ebay but I don't think its a good one because although the car now starts and runs without any error lights (in the garage) there are large drops of raw gas coming out of both exhausts and its still smoking a little plus lots of gas smell all around. I don't want to drive it anywhere with that sort of problem.

Do you think it really is the ECU or maybe something else I don't know about?

If it is do you have any knowledge or pointers of where I can buy another ECU because there are none on ebay any more.
Reply
Old Aug 23, 2016 | 07:55 AM
  #34  
Yamae's Avatar
Yamae
CL Community Team
10 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2011
Posts: 4,172
Likes: 1,006
From: Japan
Default

It's not easy to find a good ECU any more judging from the age. To check the ripple level is one idea to know the condition of the ECU. You can find the method at the FAQ page.

Anyway I recommend you to replace all the QAS capacitors because those capacitors are more than 20 years old and seldom to keep the good condition.
Reply
Old Aug 24, 2016 | 07:04 AM
  #35  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

Thanks for your quick response Yamae but that ripple level test seems to need a scope and it is beyond me lol.

I opened the ECU and all the caps seem in perfect condition (not even close to swollen or leaking). Well I get the impression you do think the problem is with the ECU and not something else so if you hear of any for sale please let me know. I'd hate to scrap the car if there is still a chance to fix it.

I'm open to any other suggestions or pointers you may have and thanks a whole lot for your help so far!
Reply
Old Aug 24, 2016 | 07:45 AM
  #36  
Yamae's Avatar
Yamae
CL Community Team
10 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2011
Posts: 4,172
Likes: 1,006
From: Japan
Default

Capacitors can't be checked by eyes. Period.
Reply
Old Aug 24, 2016 | 09:45 AM
  #37  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

Well, well I wouldn't have known that!

Where can I go to find a diagram of where on the circuit boards are the QAS caps located
Reply
Old Aug 24, 2016 | 09:58 AM
  #38  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

Hi again Yamae, I see you have a lot of highly respected posts on here. I have been researching your posts regarding replacing the capacitors and have found they are very difficult to get the correct ones and the job itself seems very technical to do right.

Can you recommend a place where I can send my ECU to get the caps replaced correctly? It could be in Japan or anywhere else. I think that would be a much better option than trying to do the job here in Trinidad, West Indies where I actually live.
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Aug 24, 2016 | 08:38 PM
  #39  
Yamae's Avatar
Yamae
CL Community Team
10 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2011
Posts: 4,172
Likes: 1,006
From: Japan
Default

You need to search the Forum further more. You can find all the answers there.
Reply
Old Aug 25, 2016 | 06:15 AM
  #40  
avhart's Avatar
avhart
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2016
Posts: 258
Likes: 41
From: NA
Default

Ok I appreciate all your help Yamae.
Reply
Old Aug 25, 2016 | 10:50 AM
  #41  
sam12345's Avatar
sam12345
Lexus Champion
iTrader: (1)
 
Joined: Nov 2009
Posts: 2,037
Likes: 9
From: tx
Default

Digikey has caps look at the main post about changing them
Reply
Old Aug 25, 2016 | 04:10 PM
  #42  
dicer's Avatar
dicer
Lead Lap
 
Joined: Jul 2010
Posts: 4,525
Likes: 98
From: ca
Default

Tanin should have the caps too.
Reply
Old Aug 26, 2016 | 07:40 PM
  #43  
YODAONE's Avatar
YODAONE
Pole Position
 
Joined: Nov 2014
Posts: 3,254
Likes: 418
From: CALIFORNIA
Default

Originally Posted by PureDrifter
'00 had some significant changes to the way the brakes worked, would stick to '98-99 if I was in your situation.
Is it the ECU alone what causes brakes to operate differently on 2000 LS400?

I was comparing P.N.s between 98-99 and 00 brake syatem electronic, electrical and mechanical componenents and they appear to be the same...

Info appreciated whether swapping ECU alone will improve braking..
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
skyther
LS - 1st and 2nd Gen (1990-2000)
2
Oct 20, 2017 06:09 PM
Kenny619
GS - 2nd Gen (1998-2005)
6
Jul 7, 2017 04:50 PM
BostonVP
ES - 1st to 6th Gen (1990-2018)
2
May 15, 2013 12:46 PM
mirka
ES - 1st to 6th Gen (1990-2018)
3
Aug 29, 2012 12:53 AM
coldbay
LS - 3rd Gen (2001-2006)
13
Sep 9, 2011 01:18 PM




All times are GMT -7. The time now is 09:16 PM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE