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98 Eclipse TCU pinout or solenoid pack pinout

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T420A

Probationary Member
20
1
Aug 14, 2013
Barnegat, New Jersey
OK sadly my first post here is a question... :-( I have built my own TCU to piggyback the OEM TCU its now time to test and install however none of the pinouts I can find match the harness on my 2G 98 420A A/T... Anyone have any ideas? I need to find the solenoids and hopefully the speed sensor wires on the TCU.

Thanks
 
Thanks Bud92gsx that worked. The pinout numbers don't match the numbers on the harness but if you look at the connector they are correct (well on mine). Thank you so much, I can now test out my mod and share my manumatic tcu with everyone. :)
 
Thanks Bud92gsx that worked. The pinout numbers don't match the numbers on the harness but if you look at the connector they are correct (well on mine). Thank you so much, I can now test out my mod and share my manumatic tcu with everyone. :)

Sweet man.It took me a while to find that So im glad it helped.

Question tho.Did you just copy my shift box or how did you make your own?
 
I'm using an Arduino mega 1280 (had it in my bin and it had plenty of i/o's). Its reading the tcu and has a fail-safe; in case my board fails the control goes back to the tcu. It also wont allow shifting into first at an invalid speed and can be activated/deactivated at any time in any gear without worry of going into an inappropriate gear. There's a lot more going into it such as vga display output into my head unit for monitoring the engine and tranny and pressure solenoid control.

I've completed all the main functionality and will be moving on to the extras now :)

I've seen basic shift boxes but none looked like they were really what i wanted so being an engineer like most things I build it :)

If ever I get really fancy I'll add a can interface for more fun :)
 
Ok so as I said earlier the diagram is working for me. I see I have 3 solenoids to control (l/r 2-4 & od). My co fusion comes in when it comes to controlling line pressure. I don't see a bleed / pressure solenoid anywhere. Anyone have any idea?
 
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