I have a 89 DX Automatic. When I purchased the car the previous owner told me he swapped in another engine and transmission because it over heated. And since then the check engine light has been on which I'm assuming he didn't change the ECU. And the car he got his engine and transmission from is in a junkyard in a different city. When I asked where the donor car was he also told me that this engine and transmission is out of a newer civic (90-91). I'm tired of seeing the check engine light on so I'm trying to find the correct ECU for this engine and transmission.
The ECU in the car now is a 37820-PM5-L580
Dated 89.6.12
The transmission Tag:L4-1305141
Does anyone know what is the correct ECU for this engine and transmission set up?

 

you need to post the correct engine stamp located on the front of the motor...its possible that he just swapped in a replacement jdm zc sohc or another d15b2 motor and kept it dpfi...!!!

 

It is a D15B2 that was what was originally in it.

 

pm5 is the correct ecu for the d15b2 motor...you need look up the ecu codes to figure out why you have a CEL...there is info on how to look up ecu codes in the FAQ section...!!!

 

Its not an engine problem the engine runs fine the automatic transmission that originally came in it is different from what was swapped in. The previous owner doesn't know anything about what he had and what he swapped in what he looked for was if the engine looked the same (DPFI). But he swapped out the transmission as well for some reason i'll never know.

 

Help please?

 

what codes is it blinking? start with that first.

 

it could just be a bad or disconnected sensor, check the light, it knows all

 

Code Number 19 Automatic Transmission Lock Up Control Solenoid Valve is the Only code blinking on my ECU. The previous owner did not change the ECU when he swapped motors which he didn't know the transmissions were different. So I'm trying to track down the correct ECU for this Engine and Transmission assembly does anyone know what is the correct ECU?

 

I'm assuming this had the 2 solenoids ECU. Because this engine/transmission has only 1 solenoid but still has a 2 solenoid ECU.

 

sounds like you got a jdm replacement auto transmission since jdm ones have 2 solenoids and usdm only has 1 from what i remember with my old auto tranny...!!!

 

Alright well do you have any ideas what ECU is need so I don't have to look at a CEL all the time?
From what I understand this had a 2 solenoid transmission and ECU. Now it has a 1 solenoid transmission but a 2 solenoid ECU.

 

ive never heard of a two solenoid ecu...either you have a auto or a 5-speed ecu...!!!

 

Darn okay well thanks for the help. I guess I'm stuck with it

 

um is the damn sensor plugged in? what other trans could it be besides an 88-91 auto..pretty sure 92 and up wouldnt mount right so youd be ables to tell if its was fidanglled in there