understanding ECU part#'s - The Acura Legend & Acura RL Forum
Acura Legend Forum Acura Legend Forum
 

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   The Acura Legend & Acura RL Forum > Shop Talk > DIYs

DIYs These threads contain answers to common topics. "Do it yourself" modifications are also archived here.

Acura-Legend.com is the premier Acura Legend Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
Old 11-05-02, 02:49 PM   #1 (permalink)
Cap
 
Join Date: Oct 2002
Posts: 151


iTrader Score: 0 reviews
understanding ECU part#'s

I spent way too much time analyzing the ECU part numbers at car-parts.com. Here's what I found. Legend ECU's are numbered thus:

37820-PY3-A55

The first 5 digits are almost always the same.
The next 3 digits seem to designate Type 1/2.
PY3 == Type 1
PX9 == Type 2
The next digit seems to indicate emissions.
A == FED
L == Calif.
C == Canada?
The final two digits appear to be software revision numbers, larger is newer I assume.

Here are some oddballs that I found:
39900-SP1-A1
37820-PG3-xxx
-PX3-xxx
-PL2-xxx

For 1991-1992, the FED Coupes and Sedans seem to use the same part numbers 37820-PX3. The auto trans cars use -A52, -A53, and -A55. The manual trans cars use -A02, -A04.

For 1993-1995, it gets more complex. The auto trans units seem to use the 37820-PX9. An exception seems to be the L Sedan Auto which uses the PY3-A57, -A58, or -A72.

The 1993-1995 GS manual trans uses a PY3-A09. The manual trans coupe LS uses a PX9-A17

I haven't catalogued the California numbers. But the trend seems to be the same: low software numbers are for manual trans, and higher numbers for auto trans.

I think it would be a fun project to create and publish a software library of all these original Acura ECU programs. I DO NOT advocate cloning aftermarket ECU programs such as Bayou.

Think how much easier it would be to swap engines or transmissions if you could simply reprogram your ECU for the proper combination? I wonder what differences in power or drivability there are between the different revisions?

If anyone wants to help with the project, PM.

Cheers, Cap
Cap is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-05-02, 04:05 PM   #2 (permalink)
*r**h *eller
 
Join Date: Jan 2002
Location: Knoxville Tn
Posts: 1,920


Car 1: 07 TSX
Car 2: 08 Odyssey
Car 3: The roller skate


iTrader Score: 1 reviews
Send a message via AIM to Dave C ver2.0 Send a message via Yahoo to Dave C ver2.0
Very usefull information. I'll sticky it here for a while. Probably eventually move it to Usefull Topics forum.
__________________
I like my little red roller skate.
Dave C ver2.0 is offline   Reply With Quote
Old 11-05-02, 04:48 PM   #3 (permalink)
Cap
 
Join Date: Oct 2002
Posts: 151


iTrader Score: 0 reviews
Some pics of an ECU






Enjoy, Cap
Cap is offline   Reply With Quote
 
Old 11-09-02, 04:41 PM   #4 (permalink)
 
Join Date: Jan 2002
Posts: 3,292


iTrader Score: 0 reviews
B-Lo is offline   Reply With Quote
Old 11-16-02, 01:33 PM   #5 (permalink)
502MotorSports.com
 
502 MotorSports's Avatar
 
Join Date: Jan 2002
Location: ATLVILLE
Posts: 9,321


Car 1: e39 540i | e28 533i [Euro]
Car 2: e60 530i | e46 330i
Car 3: S430


iTrader Score: 0 reviews
Send a message via AIM to 502 MotorSports Send a message via Yahoo to 502 MotorSports
Moving to archives section

thanks for your hard work, sir
502 MotorSports is offline   Reply With Quote
Old 03-01-03, 02:02 PM   #6 (permalink)
GS Hog
Golden Arrow Champion
 
LegendGS's Avatar
 
Join Date: Jan 2002
Location: SoCal
Posts: 7,043


Car 1: 1994 Legend GS-Auto
Car 2: 1994 Legend GS-6 spd
Car 3: 1993 NSX-6 spd


iTrader Score: 2 reviews
Good job, Cap!

Just one note though. My '94 GS 6-speed uses ECU # 37820-PX9-L17 (CA car), and the Fed counterpart is, as noted, 37820-PX9-A17.

The ECU # 37820-PY3-A09 I'm guessing may be for the '93 - '95 L Coupes.
LegendGS is offline   Reply With Quote
Old 02-08-05, 12:19 PM   #7 (permalink)
Registered User
 
FutureX 2001's Avatar
 
Join Date: Jan 2002
Location: Riverside, CA
Posts: 4,658


Car 1: '95 Coupe
Car 2: '94 Sedan GS
Car 3: '90 Coupe


iTrader Score: 3 reviews
Send a message via ICQ to FutureX 2001 Send a message via AIM to FutureX 2001 Send a message via MSN to FutureX 2001
This is a good thread. Glad I searched for it.
I'll add to the list-

I have a 1995 Legend L Coupe (Automatic), California car all its' life so I assume it's a California-ECU edition.

ECU CODE: 37820-PX9-L57


Some of the ECU variations might be due to TCS, mine does not have that function. (L Coupe)
FutureX 2001 is offline   Reply With Quote
Old 03-09-05, 11:26 AM   #8 (permalink)
 
Join Date: Feb 2005
Posts: 165


iTrader Score: 0 reviews
I have a 93 legend Coupe L and my ECU is 37820-px9-L55, would putting a non TYPE II ECU work on the car?
anthony415 is offline   Reply With Quote
Old 03-09-05, 06:47 PM   #9 (permalink)
 
Join Date: Jun 2004
Posts: 618


iTrader Score: 0 reviews
you guys got some balls to remove that. i'm not touching that thing! hahahha
phan_nam420 is offline   Reply With Quote
Old 06-17-08, 02:32 PM   #10 (permalink)
 
Join Date: Oct 2007
Posts: 766


iTrader Score: 6 reviews
OK so here's the part number from the six speed I have 37820-px9-a05, I can't find the A05 anywhere.
MXHalofan is offline   Reply With Quote
Old 06-17-08, 02:40 PM   #11 (permalink)
Registered User
 
Join Date: Mar 2008
Location: Denmark
Posts: 472


Car 1: 1994 Acura Legend LS Coupe 6-spd MT


iTrader Score: 0 reviews
Quote:
Originally Posted by MXHalofan View Post
OK so here's the part number from the six speed I have 37820-px9-a05, I can't find the A05 anywhere.
I guess the car you're referring to is the one listed in your vehicles to the left right under your name.
If that's the case it wouldn't give any meaning listing your ECU code since your car has been modded. No 92 Legend has a 6-spd transmission. It doesn't make sense if you're trying to make the numbers provided here seem wrong.

Last edited by Gothche; 06-17-08 at 02:57 PM.
Gothche is offline   Reply With Quote
Old 06-18-08, 02:32 PM   #12 (permalink)
 
Join Date: Oct 2007
Posts: 766


iTrader Score: 6 reviews
that part number is from a 93 t2 6mt not the one in my profile
MXHalofan is offline   Reply With Quote
Old 06-18-08, 05:46 PM   #13 (permalink)
Registered User
 
Join Date: Mar 2008
Location: Denmark
Posts: 472


Car 1: 1994 Acura Legend LS Coupe 6-spd MT


iTrader Score: 0 reviews
ok but the number doesn't exist according to Acura or Honda, so it seems a bit strange.
Maybe it's a modded chip or something aftermarket, who knows?

Last edited by Gothche; 06-18-08 at 05:55 PM.
Gothche is offline   Reply With Quote
Old 06-20-08, 09:50 PM   #14 (permalink)
 
Join Date: Oct 2007
Posts: 766


iTrader Score: 6 reviews
I also have an a15 from a t2 6mt, both are stock stickers I think there is another explanation besides being modded. It could be different years or places of manufacture, software ...??? Hmmm
MXHalofan is offline   Reply With Quote
Old 06-21-08, 09:47 AM   #15 (permalink)
Registered User
 
Join Date: Mar 2008
Location: Denmark
Posts: 472


Car 1: 1994 Acura Legend LS Coupe 6-spd MT


iTrader Score: 0 reviews
yes the exact version(ECU) has probably just been discontinued and none of them left.
Gothche is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  The Acura Legend & Acura RL Forum > Shop Talk > DIYs


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 06:59 PM.



Powered by vBulletin®. Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
© AutoGuide