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1990 Toyota 4Runner 4X4 A340H
Posted: Sun Jul 18, 2010 4:45 pm
by dfarr67
Looking into purchasing the PnP 42 pin Denso version of MS. I assumed plug and play was exactly that (besides building and tuning) it looks like I may have an issue with controlling the auto trans...it has it's own dcu as well. Any thoughts?
Re: 1990 Toyota 4Runner 4X4 A340H
Posted: Mon Jul 19, 2010 5:07 am
by Matt Cramer
This one is likely to take a bit of trial and error. I've heard the ECU simply passes along signals to the transmission controller at various throttle opening percentages. This should be possible to replicate, but you'd need to do some testing to find out the exact nature of the signals sent from the ECU to the transmission controller.
Re: 1990 Toyota 4Runner 4X4 A340H
Posted: Thu Aug 26, 2010 12:16 pm
by AndyL
Two options - MSGPIO I read can control a A340; other option you can use is to steal a 87-92(? memory fails me now - something like that) Jeep XJ/cherokee with an AW4 (export version of the A340 for Jeep) TCU & harness. Uses a second TPS (separate from the EFI TPS) - and lets you separate transmission from ECU for the toyotas (I'm using this setup in my VW TD into toyota swap).
Re: 1990 Toyota 4Runner 4X4 A340H
Posted: Thu Aug 26, 2010 6:51 pm
by Bernard Fife
dfarr67,
I don't know anything specific about your transmission, but the MegaShift info is here:
http://www.msgpio.com/manuals/mshift/index.html
Lance.
Re: 1990 Toyota 4Runner 4X4 A340H
Posted: Thu Nov 03, 2011 10:13 am
by dfarr67
I ended up putting a 5spd in the truck- hopefully this will free up some parasitic loses and increase reliability.