Notices
SC - 1st Gen (1992-2000)

'95 ECU Replacement - Not Starting

Thread Tools
 
Search this Thread
 
Old Mar 3, 2023 | 06:43 PM
  #1  
rmikebaker's Avatar
rmikebaker
Thread Starter
Rookie
 
Joined: Oct 2022
Posts: 26
Likes: 2
From: Ohio
Default '95 ECU Replacement - Not Starting

Just replaced the engine ECU in my '95 SC400 with a rebuilt unit from All Computer Resources in FL, and now there's no CEL and it won't start - just cranks. I see where other folks have had the same issue, and looks like the likely fix is to get a new ECU. Just curious though, what is the real underlying cause? Did they program it incorrectly? Could it still have a faulty component? Just wondering why this is a common problem...
Reply
Old Mar 3, 2023 | 08:27 PM
  #2  
Photon440's Avatar
Photon440
Intermediate
15 Year Member
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Jan 2007
Posts: 397
Likes: 17
From: Cloverdale, BC Canada
Default

Have you asked the seller what potential problems could be causing your starting issues?
Reply
Old Mar 3, 2023 | 08:56 PM
  #3  
rmikebaker's Avatar
rmikebaker
Thread Starter
Rookie
 
Joined: Oct 2022
Posts: 26
Likes: 2
From: Ohio
Default

Originally Posted by Photon440
Have you asked the seller what potential problems could be causing your starting issues?
Yeah, I've made them aware, but they have yet to respond.
Reply
Old Mar 3, 2023 | 09:43 PM
  #4  
Arsenii's Avatar
Arsenii
Lead Lap
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2019
Posts: 3,694
Likes: 1,102
From: Michigan
Default

Hello,

Do you have Spark and Injectors?

No CEL when the Ignition is in the ON position is a solid sign that either the bulb is burnt out, or that the ECU is not functioning, I would contact the place that did a rebuild to see if they offer warranty repairs if it's not too late, and if not, you will have to find a different place.

Tanin Auto Electronix is a highly regarded place around here, I myself haven't worked with them, so I can't speak for the quality, but it is a place to start from all the positive reviews that are out there, in fact, they also have an account here on this forum.

Hope this helps and best of luck!
Reply
Old Mar 4, 2023 | 09:41 AM
  #5  
Photon440's Avatar
Photon440
Intermediate
15 Year Member
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Jan 2007
Posts: 397
Likes: 17
From: Cloverdale, BC Canada
Default

Indeed. In fact, Tanin has my ECU at this very moment, so I'll see for myself how it performs when I get it back.
Reply
Old Mar 4, 2023 | 02:23 PM
  #6  
rmikebaker's Avatar
rmikebaker
Thread Starter
Rookie
 
Joined: Oct 2022
Posts: 26
Likes: 2
From: Ohio
Default

Originally Posted by Arsenii
Hello,

Do you have Spark and Injectors?

No CEL when the Ignition is in the ON position is a solid sign that either the bulb is burnt out, or that the ECU is not functioning, I would contact the place that did a rebuild to see if they offer warranty repairs if it's not too late, and if not, you will have to find a different place.

Tanin Auto Electronix is a highly regarded place around here, I myself haven't worked with them, so I can't speak for the quality, but it is a place to start from all the positive reviews that are out there, in fact, they also have an account here on this forum.

Hope this helps and best of luck!
I just got it and it has a warranty, so I should be good. I put the old ECU back in and car starts and runs, so it definitely points the finger at the new ECU as the issue.

I've used Tanin before, they're just a little pricey. Same ECU is almost 3x as much.
Reply
Old Mar 5, 2023 | 01:53 PM
  #7  
TaninAuto's Avatar
TaninAuto
Sponsor
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2012
Posts: 1,140
Likes: 156
From: WI
Default

Originally Posted by rmikebaker
I just got it and it has a warranty, so I should be good. I put the old ECU back in and car starts and runs, so it definitely points the finger at the new ECU as the issue.

I've used Tanin before, they're just a little pricey. Same ECU is almost 3x as much.

We are not aware of any other companies that actually plug your repaired ECU or any refurbished ECU that they have in stock into vehicles to ensure proper function like we do. If they did you wouldn't be having this issue. It's just an extra step we take to avoid back and forth.

With that said, we aren't looking to steal business from other companies. We are here if anyone needs us.



__________________
TANIN AUTO ELECTRONIX
262-456-4147
contact@taninauto.com
www.taninautoelectronix.com
https://taninjdm.com/
Our Lexus LS430 Dealership




Reply
Old Mar 5, 2023 | 03:31 PM
  #8  
rmikebaker's Avatar
rmikebaker
Thread Starter
Rookie
 
Joined: Oct 2022
Posts: 26
Likes: 2
From: Ohio
Smile

Originally Posted by TaninAuto
We are not aware of any other companies that actually plug your repaired ECU or any refurbished ECU that they have in stock into vehicles to ensure proper function like we do. If they did you wouldn't be having this issue. It's just an extra step we take to avoid back and forth.

With that said, we aren't looking to steal business from other companies. We are here if anyone needs us.
Yep, understood

The climate control module I purchased from Tanin has been rock solid - no issues. Wish these cars didn't have so many darn computers.
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

Toyota and Lexus Join Mille Miglia For The First Time

 Verdad Gallardo
story-1

Lexus NX 350h: A Fuel-Sipping Secret Hot Hatch???

 Michael S. Palmer
story-2

5 Best & 5 Worst Lexus Daily Drivers

 Joe Kucinski
story-3

Top 5 Hottest Lexus & Toyotas in 2026 (Hardest To Buy)

 Brett Foote
story-4

2026 Lexus IS 350 F Sport Review: The Last of Its Kind Still Rocks

 Michael S. Palmer
story-5

Top 10 Most Confusing Things Lexus Has Ever Done!

 Joe Kucinski
story-6

2026 Lexus ES Review: Lexus Re-Embraces Founding Principles

 Michael S. Palmer
story-7

10 Lexus Bargains That are Cheaper Than a New Toyota RAV4

 Joe Kucinski
story-8

8 Weirdest Things Lexus Has Ever Built

 Verdad Gallardo
story-9

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
Old Mar 5, 2023 | 03:34 PM
  #9  
Arsenii's Avatar
Arsenii
Lead Lap
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2019
Posts: 3,694
Likes: 1,102
From: Michigan
Default

Originally Posted by rmikebaker
Wish these cars didn't have so many darn computers.
Maybe you should get a Lincoln then..?
Reply
Old Mar 5, 2023 | 03:36 PM
  #10  
rmikebaker's Avatar
rmikebaker
Thread Starter
Rookie
 
Joined: Oct 2022
Posts: 26
Likes: 2
From: Ohio
Default

Originally Posted by Arsenii
Maybe you should get a Lincoln then..?
No, I should go back to my 911. It was easier to work on and so far, much more reliable
Reply
Old Mar 6, 2023 | 11:08 AM
  #11  
Kris9884's Avatar
Kris9884
Racer
10 Year Member
Liked
Loved
Community Favorite
iTrader: (7)
 
Joined: Jun 2012
Posts: 1,818
Likes: 30
From: OR
Default

Relentless Motorsports in TX is well known for their ECU repairs as well, Josh is very transparent and sends pictures along the way.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
green95SC
SC - 1st Gen (1992-2000)
6
Jan 8, 2024 02:52 PM
xspsi6
SC400 / 300 Classifieds
2
Nov 24, 2015 08:05 PM
phillup23
SC - 1st Gen (1992-2000)
8
Oct 28, 2014 01:56 PM
Stereorob
LS - 1st and 2nd Gen (1990-2000)
6
May 31, 2014 03:07 PM
lexforlife
SC400 / 300 Classifieds
2
Nov 24, 2008 02:56 AM




All times are GMT -7. The time now is 03:54 PM.

story-0
Toyota and Lexus Join Mille Miglia For The First Time

Slideshow: A five-car lineup spanning more than five decades of Toyota performance and engineering will tackle one of Italy's most celebrated automotive routes.

By Verdad Gallardo | 2026-06-15 16:53:16


VIEW MORE
story-1
Lexus NX 350h: A Fuel-Sipping Secret Hot Hatch???

Slideshow: a quick review of the 2026 Lexus NX 350h F Sport Handling

By Michael S. Palmer | 2026-06-15 15:25:34


VIEW MORE
story-2
5 Best & 5 Worst Lexus Daily Drivers

Slideshow: The 5 best and 5 worst Lexus daily drivers

By Joe Kucinski | 2026-06-15 11:14:58


VIEW MORE
story-3
Top 5 Hottest Lexus & Toyotas in 2026 (Hardest To Buy)

These five Lexus and Toyota models are the most sought-after on the market right now.

By Brett Foote | 2026-06-15 10:47:52


VIEW MORE
story-4
2026 Lexus IS 350 F Sport Review: The Last of Its Kind Still Rocks

Slideshow: the 2026 IS 350 isn't all that new, and that's why we love it!

By Michael S. Palmer | 2026-06-04 14:35:23


VIEW MORE
story-5
Top 10 Most Confusing Things Lexus Has Ever Done!

Slideshow: 10 most confusing things Lexus has ever done.

By Joe Kucinski | 2026-06-04 09:40:55


VIEW MORE
story-6
2026 Lexus ES Review: Lexus Re-Embraces Founding Principles

Slideshow: Our First-Drive Review of the 2026 Lexus ES!

By Michael S. Palmer | 2026-05-29 20:30:16


VIEW MORE
story-7
10 Lexus Bargains That are Cheaper Than a New Toyota RAV4

Slideshow: 10 Lexus bargain that are cheaper than a new Toyota.

By Joe Kucinski | 2026-05-20 10:28:20


VIEW MORE
story-8
8 Weirdest Things Lexus Has Ever Built

Slideshow: From hoverboards to luxury yachts, these are the strangest projects Lexus has ever attached its badge to.

By Verdad Gallardo | 2026-05-16 11:34:36


VIEW MORE
story-9
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