What auto trannies fit?

system · January 20, 2005, 5:52am

OldGuy:

Welcome Aboard “OBD Harnesses”. Any help you can offer would be great. I can only speak for myself but my biggest headache is obtaining the wiring and/or pinout diagrams for my JDM ECU. It is a “P72-901” automatic ECU, the one pictured above in one of my earlier posts. I have searched everywhere I know including buddies of mine in Hong Kong and Malaysia. I am told that it was exclusively a Japanese market product. They did not export it anywhere. I have considered the G3 TCM but the issue of an automatic tranny and a VTEC engine can only be resolved by using a JDM ECU unless I want to shift the automatic manually and not get full function from it. There was one of our members who, I think, said his buddy just used the P72 manual ECU and shifted the auto tranny manually. That would work probably but I doubt that the converter would lock up. So its a compromise that I am still studying. I would like to use the JDM ECU. I think that would get me the best result. Do you have or do you know where I can get a diagram of pinouts. If you provide these services as a “profession” and you are looking to get paid, then please contact me by e-mail and let me know what you offer and how you can help me get this up and running. I have two of these ECUs, both identical, so some experimentation is possible.

My name is Jason. Send me an email and I will see what I can do no doubt. I will also post up information as well as I receive it in. I agree in using the correct ecu for the setup. Hang in there and we will get it fixed for sure man.

Jason

OldGuy · January 21, 2005, 1:43am

“Power2weight”, you may have hit on something. I didn’t know that the legend had the integrated ECU. Does it have four connectors? I have a mechanic buddy who can supply me with wiring and pinout diagrams for the legend. I’ll check that one out. Thanks for the lead.

“OBD Harnesses”, I will make contact by e-mail.

system · January 21, 2005, 4:45am

yes, it is 4 connectors for AT version, with the 4th connector being primarily for AT functions. Also, the G2 Legend AT seems to function the same as the G3 Teg AT with similar options (no “S3, S4” stuff) and only 2 shift solenoids. Note that there are a few different types of Legends, Type I AT, Type I 5MT, Type II AT and Type II 6MT. The Type II powertrain is available 93-on in the coupes, and 94-on in GS sedans. So, I don’t recall the specifics of the Type I AT cars, but I am 100% sure you will find the integrated TCU in the ECU of the 93-on Type II cars (93-95 coupe and 94-95 GS sedan). Good luck…

OldGuy · January 27, 2005, 2:41am

Power2weight, I obtained a wiring diagram for the 95 Legend and it shows ECU outputs going to a “TCS control unit”. Isn’t that a TCM or what is it? There don’t seem to be any outputs going directly to a tranny solenoid or similar functions. Some of the outputs to the TCS control unit come from the “C” connector (the 4th one) and some come from the “D” connector. Do you have any explanation of that before I go looking further? Thanks.

system · January 27, 2005, 5:05am

TCS=Traction Control System. It is a “second” throttle body that is motorized to restrict engine power as a way of traction control. It can be ignored. Also, I believe that 93-95 Type II L coupe did not have it, only the LS. Try looking at “L” specific wire diagrams.

OldGuy · January 27, 2005, 4:47pm

Thanks. I’ll look again.

system · January 27, 2005, 9:11pm

www.levelten.com i couldnt be happier with my tranny !!!

OldGuy · January 29, 2005, 10:50pm

What did you get from Levelten? Can you give us more insight into your setup and how it is better than stock? Are you using the same year tranny as the car?