AEM Controlling the trans?

[tissimo]

Has anyone been able to have the AEM EMS control the auto trans by its self (no ECT ecu)?

[SupraMan1987]

Pretty sure AEM specifically states for 5spd cars only

[tissimo]

Pretty sure AEM specifically states for 5spd cars only
Who carese what AEM Says. I mean wire up the auto ecu (2 Solenoids and lockup solenoid) to the ecu and have the aem features control it. Its possible with the software, and looks like the ecu should work on it fine (just uses standard outputs).

[blk91]

It can be done works fine..... But I know nothing about how at all, I just test drove one a few years ago that was a Aem with an auto, The guys not in the supra community anymore but ill see if i can get ahold of him, Also Aem did the tune on the car and all of the setup, I beleive his car was the frist 89-92 car they did.

[IJ.]

Huge amount of logic involved to do this.
(I know the MoTeC 100 series can't handle it on it's own but the ADL2 can)

Be better having the AEM simulate the TPS signal to the ECT.

[MK-111]

One of the guys on the u.k forum had an AEM fitted to an auto, it would not work, when he got in touch with AEM the person he spoke to said it had never been tested on the 7m autobox,

[blk91]

Sounds like about the right answer from Aem, they seemed to change staff about every 90 days when I dealing with them, But I have for sure been in ma70 running a AEM that was controlling, I do remember it had very hard upshifts and was told that he could control the trq coverter.

[tissimo]

Huge amount of logic involved to do this.
(I know the MoTeC 100 series can't handle it on it's own but the ADL2 can)

Be better having the AEM simulate the TPS signal to the ECT.

What logic is needed? just switching a few solenoids on and off for change gears really. We dont have to control the Line pressure with a solenoid or anything like the mkiv, just 3 wires (2 gear solenoids and lockup solenoid).

By eliminating the ect I can controll the shifts/downshifts converter lockup and everything, theres no reason not to use the features available.

[IJ.]

You need a bunch of if/and/or statements to do it.

If you think you can pull it off with just switching solenoids by all means go for it and post your progress.
(I asked the MoTeC engineers to do this and they gave up after a week on the ECU and said the only real way to do it was to use an ADL)

example: how does your ECU know the car is accelerating up a hill and needs to kickdown a gear just using an on/off table?

[tissimo]

You need a bunch of if/and/or statements to do it.

If you think you can pull it off with just switching solenoids by all means go for it and post your progress.
(I asked the MoTeC engineers to do this and they gave up after a week on the ECU and said the only real way to do it was to use an ADL)

example: how does your ECU know the car is accelerating up a hill and needs to kickdown a gear just using an on/off table?
TPS input, unfortunately AEM doesn't have a 2th input for load on gear selection map, everything is based of TPS. It might be a little crude, but should work fine.

Heres a pic of the mkiv basemap.
http://i129.photobucket.com/albums/p227/tissimo91t/Misc/AEMAuto.jpg

[Nick M]

Why not just let the trans ECU do its job?

[figgie]

it is a matter of lack of outputs that can handle the current draw.

Feed the stock trans ecu and call it a day. Requires three outputs from the EMS based on TPS position as that is how the stock config does it. That or you can do what Ian did and get a transcontroller.

This is an example, Ian got something different if I recall

http://www.tciauto.com/Products/Electronics/default.asp

[tissimo]

Why not just let the trans ECU do its job?

I want to control the WOT shift points, gear selection, and converter lockup to my liking.

it is a matter of lack of outputs that can handle the current draw.

Feed the stock trans ecu and call it a day. Requires three outputs from the EMS based on TPS position as that is how the stock config does it. That or you can do what Ian did and get a transcontroller.

This is an example, Ian got something different if I recall

http://www.tciauto.com/Products/Electronics/default.asp
AEM EMS controls the mkiv trans perfectly fine (same gear selection setup, 2 solenoids), only need to wire in a relay for the converter lockup (aem ems isn't strong enough iirc).

Anyone should be able to do this, just have to wire in the gear solenoids & lockup solenoid to the ECU to get it to work. I think I've decided to leave my car bone stock though, so will not be trying it out my self.

[IJ.]

it is a matter of lack of outputs that can handle the current draw.

Feed the stock trans ecu and call it a day. Requires three outputs from the EMS based on TPS position as that is how the stock config does it. That or you can do what Ian did and get a transcontroller.

This is an example, Ian got something different if I recall

http://www.tciauto.com/Products/Electronics/default.asp

I'm using a PCS it's the MoTeC of trans controllers :)