maverick32

hows it going fellas i was wondering if anyone knows how to decode the serial code on a ecu. They type of decoding that i want is to know whether or not this ecu is for a manual/auto tranny.

37820-p13-no1
552 j-mt

maverick32

ttt...anyone?

THC07

its 5 speed

EDIT: Wrong!

THC07

Example:
37820-ABC-XYZ
Digits-- Meaning--

ABC Engine ECU designed for
X Market of ECU - see chart below
Y 0: 5-speed, 5: Auto
Z even number: "11F0" board, odd number: "1720" board

Code-- Market--

Axx USDM 49-state
Lxx USDM Cali Emissions
xxx JDM
Jxx JDM
9xx JDM (auto)
Gxx EDM
Qxx Oz DM
Cxx Canadian
Nxx usually factory reprogrammed, no particular market
Example:
37820-P28-A52
 P28 = SOHC Vtec D16Z6
 A = US, 49 state
 5 = Auto
 2 = "11F0" board

maverick32

ah **** i see. i see... so for the one below

37820-p13-901

9=jdm (auto)
0= manual?
1=1720 board

is this correct or am i missing something? lol..thanks man

(im a total noob at this) lol

maverick32

as for the last digit...1720 board, how is this digit significant? what is it for?

THC07

it must be an auto then yea.
1720 is just the board type.

d15bdelsol

this is a little off topic but it wouln't let me make a new thread, my dad has a 98 lude 5spd, lately it has been dieing at random times, when it died in gear i could jiggle the key and it would come back on, so i went to honda and bought the electrical part of the switch and then never put it in cause the car quit dieing, well two days ago my dad said it died about 5 times on the way home from work and yesterday morning would not start at all so this morning i replaced the switch and it is still just turning over and not starting up so i pulled all the plugs to make sure they were firing and they were, and its getting fuel because it was shooting flames when i laid the plugs over the holes in the valve cover, i called a guy i sort of know who was a honda mechanic and he said 90 % of the time the ecu has gone bad. If so where is it located and where can i get one cheap? Thanks

maverick32

the ecu is located on the inside passanger side. you have to pull the carpet back from there you'll be able to see it...

d15bdelsol

what do you mean by inside pass side? there is a box under a plastic panel on the right side of the floor mat. Im not sure if that is the ecu or not, also i pulled the right corner of the carpet up and the is another box under a metal frame that the carpet sits on im not sure it that one is it either. please help my dad needs this car to get to work tomorrow

d15bdelsol

okay i found it and got it out the numbers are 37820-P5M-L03 where i can i get one and how much, would a junk yard have one that would work?? and I see that the L means cali emissions so will i have to find another with this aswell?

d15bdelsol

well i replied but its not showing up so ill do it again.. i got the ecu out and its P5M-L03, so do i have to get one with cali emissions?, or do all the US preludes have cali emission because they are made in japan and shipped to california? , and also do i have to get one that ends with a odd number so it will be the same board???? i looked on ebay and the closest one i could find was 37820 P5M L04 which would mean that it has a different board Please help me guys the car won't start and my dad has to go to work in it

hondaprofessor

i have a prelude ecu P5M - A52 AND IM NOT SURE IF ITS AUTO OR 5 SPEED CAN SOMEONE HELP?