Auto Gearbox issues and ECU's

[Ric]

Hi Guys,

 

I have some strange problems which seem to be plaguing the car the last 2 days and hopefully somebody can shed some light as they are confusing.

 

I've had zero problems with the auto gearbox in my TT since I bought it, the oil is correct, the colour and smell is what you'd expect, not burnt and a nice red.

 

Last week i fitted a 2JZ-GTE Auto MINES ecu which is the usual modified type, I've emailed mines with the serial number to confirm what exactly had been done with the ECU but they've not replied yet, i know nobody can know until then and probably a bit daft to fit it without knowing!

 

After the ECU was fitted, the car ran fine I didn't notice much difference in how the car was, perhaps a little louder more low down torque from the bum dyno.

 

The car was run 30 minutes after fitting but I didn't actually take it for a drive anywhere.

 

During driving down to japfest a few things started to happen:

 

The OD button was not operating as it used too, turning OD OFF would put the car into 2nd gear nearly 4k rpm and it would drop into 3rd but instead of accelerating from there as soon as i touched the peddle it would drop back down into 2nd and just rev the nuts off it. it would also change up into OD (with it off) the gears were allover the place.

 

Note - i removed the OD/MANU lights from my cluster a while back so i can't see what lights (if any) are flashing, i've never had the MIL light come on, or any other warning ones.

 

After driving back from Japfest i stopped off at a friends house roughly 40 mins from silverstone, when i arrived i got more issues:

 

Reverse would not engage, The lights lit up, the beeping was working but the car just rev'd as if it was in neutral.

 

Because of this i thought i'd try a ECU reset so i left the battery disconnected overnight.

 

This morning I started the car up, reverse worked straight away however it was now D which was giving issues, it felt as if the auto box was slipping, 2-4k RPM in D to just pull away from a standstill. However starting from a standstill in 1, 2 was fine? the OD button was still acting strange.

 

I carried on my journey, perhaps 3-4 miles into it D was operating as you'd expect with no slip.

 

When i got home (100 miles later) i tried reverse, it worked, then literally 20 seconds later it didn't, same issue just revving as if it was in neutral i took the car around the block and reverse worked again... very strange.

 

Because i've not seen any of these issues before i was convinced it was electrical, perhaps down to the mines ECU after seeing this thread

 

I've refitted the standard ECU to my car and all the problems have now gone, reverse engaged every time (25 attempts) I've also taken it on a 30 mile drive, all gears, OD etc work as they did before.

 

Can anybody comment on the issues I've had, did the Mines ecu really cause all the issues? or is it something else?

Edited April 25, 2016 by Ric (see edit history)

[Mike2JZ]

Don't use the Mines ECU till you can get a response from them about what they did to that box? Seems obvious that it is the culprit here

[Nic]

Last week i fitted a 2JZ-GTE Auto MINES ecu which is the usual modified type

 

Probably a daft question but does the Mines ECU definitely have '2JZ-GT A/T' written on the Toyota label? Does it also have the part number of ECU written on the label, so you can check on the EPC which model/year of Supra it was from?

Edited April 25, 2016 by Nic (see edit history)

[Ric]

Probably a daft question but does the Mines ECU definitely have '2JZ-GT A/T' written on the Toyota label? Does it also have the part number of ECU written on the label, so you can check on the EPC which model/year of Supra it was from?

 

The sticker has the exact same part code as my existing one. I was looking for a mines one for a while and i know they can be had in auto and manual ones.

[Rob W]

Auto mines ECU that I've got fitted for reference of part numbers mate.

 

[Ric]

Cheers Rob,

 

this is the only picture i have of it to hand, although the 89 is different the part numbers where the same as yours as on my standard ecu.

 

[mattdavies]

 

http://www.mkivsupra.net/vbb/attachment.php?attachmentid=211140&stc=1&d=1461091246

 

Mine is the same as this one sticker wise

[np89]

If you open up the ECU case is there anything that looks obviously toasted? Could be a case of a bad transistor or capacitor leaked, which can be repaired, it should be really obvious once you open it up and doing so shouldn't do any harm anyway, unless you drop it or something. Worth a check tbh

[Ric]

I didnt want to break the Mines seals, the seller has agreed to take it back now anyway, just wanted to post to gather some thoughts.

[mellonman]

Leave the original ecu in , as you didnt notice much difference no harm no fail

[Ric]

Try the original ecu and see if its still the same

 

The car is perfectly fine on the original ecu

 

Update:

 

Car is running fine on the stock ECU for around 300 miles, so i'd put this solely down to the mines ecu being defective, shame

Edited June 4, 2016 by Ric (see edit history)