Ultimate 3SGTE ECU Datalogger

[JMR_AW11]

Yes you do have to solder a small PCB into the ECU. This should only be carried out by a competent technician.

BTW I got a late model UK mk2 MR2 NA ECU today. ECU 89661-17500
Dunno what rev it is (1997?) but it looks like the piggy board will fit it

I really need to get my hands on a JDM rev 3 3SGTE ECU to see what MCU chip it uses. The trouble is they are hard to get hold of as people use them for upgrades to rev2 cars.

[Rikki]

If you speak to Rogue, GTSChris, TB etc and see if they have one they could donate in return for a finished product or two that might work.

I'd be very interested in one of these for my own car when its all complete.

R

[Blue4Ice]

If you could make it something like this: -
http://www.lotusespritworld.com/EGuides ... escan.html

then I would be very interested. When I have my esprit, freescan was a god send. It was very useful in fault finding as you could see the output voltages of all the sensors as well as the actual readings.

I think I still have a pdf copy of the manual somewhere if you wanted to see it so that you could see all the functionality

[Goto10]

Yes you do have to solder a small PCB into the ECU. This should only be carried out by a competent technician.

BTW I got a late model UK mk2 MR2 NA ECU today. ECU 89661-17500
Dunno what rev it is (1997?) but it looks like the piggy board will fit it

I really need to get my hands on a JDM rev 3 3SGTE ECU to see what MCU chip it uses. The trouble is they are hard to get hold of as people use them for upgrades to rev2 cars.

Assuming it's not likely to get fried, I could probably loan you my Rev3 turbo ECU for a couple of weeks, would I get a board installed at cost for doing so?

[JMR_AW11]

If you could make it something like this: -
http://www.lotusespritworld.com/EGuides ... escan.html

then I would be very interested. When I have my esprit, freescan was a god send. It was very useful in fault finding as you could see the output voltages of all the sensors as well as the actual readings.

I think I still have a pdf copy of the manual somewhere if you wanted to see it so that you could see all the functionality

Yes it will do that kind of thing. Without giving too much away, this piggy interface operates at a very low level which means it is very powerful. It allows direct access to the raw 8bit/16bit data inside the MCU chip. Basically, you can monitor ALL the low level 8bit or 16bit variables in the MCU chip (as long as you know the command set for that particular ECU)

On some ECUs this means over 500 possible data enquiries (in theory) and therefore there will be loads of things in there that I haven't discovered yet.

If you look at the EFI traces in the plots in this thread (and the rpm) you can see they offer very fine resolution. These parameters have 16bit resolution in the ECU MCU chip. When you watch the real time GUI running the display is really fluid as you blip the throttle. i.e. the bargraphs show no jerkiness at all as the revs rise and fall.

It would be interesting to look at the Freescan manual if you have it. Thanks.

Assuming it's not likely to get fried, I could probably loan you my Rev3 turbo ECU for a couple of weeks, would I get a board installed at cost for doing so?

Thanks for the offer but I really want a rev3 ECU to keep. Could you send me an image with the lid removed?

i.e. remove the ECU lid with the main sticker? Just an image showing the ECU insides without the lid would do. Don't be tempted to peek any further into the ECU, i.e don't remove any screws other than the main ECU cover. And don't touch the insides of the ECU in case of ESD.

(TBH the ECUs are fairly bulletproof in respect to ESD/handling but better to be safe)

BTW you need a decent fitting screwdriver to get the screws undone or you will just chew them up .

[Harry]

Who out here knows the approximate volume of mr2 owners in the U.K.?

Mr2 turbo REV.1
3SGTE REV.2
SW20 (REV.3+...REV.5)


And possible/potential supply here.

[Rikki]

If the lad gets it working on rev3's then he could pop an email off to JTuner, Jap Perf, Banzai, MR2Only and Redline and get the device plopped in their new products section giving an amazing reach for potential sales which I believe is free still.

Then speaking to TB, GTSChris, Rogue, 3S and other more specialised places about takes some on to sell ...

Could work out quite well, then you've got selling to the US folks on MR2OC, group buys etc.

R.

[Harry]

Okay next question are there any branded products on the market that do
this job probably with less information from the ecu?

What information do they offer?
What is the price of these branded products?

It sounds like the intrinsic benefit of ecu development(data) here is that one has the opportunity of a flow of most or all data/information making it
possibly a first for the end user/car owner?Sound right.Where this information is mostly accessed only by Toyota or garages with diagnostics
equipment.

Next last question my assumption is that most end users would prefer a unit with in board screen to view their activaty of the car's engine data to
monitor general new tuning,track,saving motor from damage or versus
only ususng it with a pc lap top for special ocassions?

Edit*Last question how many mr2 mark two's in the U.K then Europe?

For myself in board and with screen with all the information all the time is what i would be attracted to buy.

[darcy]

Very interested REV 2 GTE and REV 3 GTE - PC based or PALM.

Palm would be good for those against driving with laptop - cheap as chips on ebay, easy to view while driving, download data to Home PC when you get home.

Keep up the good work.

PS You appear to have a 3sGT ECU but If you want another 1990 3S GT UK N/A (158BHP) ECU then just shout with a mailing address. Don't need it and I'll even post F.O.C.

[MK_Steve]

I would be well up for one of these - guaranteed sale here!

however, is thre any scope for me to feed your data into my own program?

I'm nowhere near an accomplished programmer by any stretch of the imagination, but i do enjoy playing about with my own software, and i would like the scope to be able to make the software look and run the way i want, as I'm picky like that!

would be nice to have this showing a user defined selection of large, easy to read values, on an in dash screen, with ITunes running underneath.

this may convince me to finally install a carputer!

Steve

[Spidey]

Just wondering where this development is at ?

I'm interested in a Rev3 3S-GTE, if you have gotten your hands on one.

Ta
Rob

[uglee]

Very interesting and original bit of kit!

I'll definitely take one once everything is sorted

[MK_Steve]

Another feature idea!...

How about a fault code reader that reads the code and looks it up on a database to display on the screen, in plain english, what the fault is?

Steve

[JMR_AW11]

Just wondering where this development is at ?

I'm interested in a Rev3 3S-GTE, if you have gotten your hands on one.

Ta
Rob

I've been taking a break from looking at ECUs. I'll look again in the new year. The datalogger hardware is finished though, it works well. it's just the user interface that needs more work.

I did reverse engineer the knock sensor routines for the JDM ECUs and can datalog all the relevant knock data.

The knock detection is quite clever and it retards ignition and adds fuel and it also remembers previous knock conditions (the ECU stores this as a kind of knock 'fear factor') and protects the engine in advance (doesn't wait for the knock sensor the second time)

Over time this memory/protection slowly fades if there is no more knock and the ECU gets bolder again. The amount of ignition retard due to knock can be datalogged, as can the extra fuel and also the memory value of the fear factor can be datalogged as well. (this fear factor actually has three values, each for a specific rpm range)

I also did a GUI for a pda which is far more convenient to use in a car.

Another feature idea!...

How about a fault code reader that reads the code and looks it up on a database to display on the screen, in plain english, what the fault is?

The datalogger can do this at any time (without needing the T to E1 link wire) so all I would need to do is write the text display.

It reads the codes direct from within the ECU MCU chip so it can display all the codes in the blink of an eye. (no need to count flashes)

I still haven't got hold of a rev3 ECU...

[Spidey]

Just wondering where this development is at ?

I'm interested in a Rev3 3S-GTE, if you have gotten your hands on one.

Ta
Rob

I've been taking a break from looking at ECUs. I'll look again in the new year. The datalogger hardware is finished though, it works well. it's just the user interface that needs more work.

I did reverse engineer the knock sensor routines for the JDM ECUs and can datalog all the relevant knock data.

The knock detection is quite clever and it retards ignition and adds fuel and it also remembers previous knock conditions (the ECU stores this as a kind of knock 'fear factor') and protects the engine in advance (doesn't wait for the knock sensor the second time)

Over time this memory/protection slowly fades if there is no more knock and the ECU gets bolder again. The amount of ignition retard due to knock can be datalogged, as can the extra fuel and also the memory value of the fear factor can be datalogged as well. (this fear factor actually has three values, each for a specific rpm range)

I also did a GUI for a pda which is far more convenient to use in a car.

Another feature idea!...

How about a fault code reader that reads the code and looks it up on a database to display on the screen, in plain english, what the fault is?

The datalogger can do this at any time (without needing the T to E1 link wire) so all I would need to do is write the text display.

It reads the codes direct from within the ECU MCU chip so it can display all the codes in the blink of an eye. (no need to count flashes)

I still haven't got hold of a rev3 ECU...

Well done for all the work - it'll be an amazing piece of kit

Have none of the affiliates got a Rev3 ECU that they can do some sort of offer/deal/arrangement on ?

I tried to get one for sale on eBay - if there was one, and there were a few Rev3 owners, we could chip in and buy the ECU ?

Anyone willing ?

Rob

[raptor95GTS]

sounds real nice for sure. Me likely this idea loads. Just need another ecu...

[MK_Steve]

Really would like to get my hands on one of these! Keep up informed fella!
Good work!

=D>


Steve

[murf]

I tried to get one for sale on eBay - if there was one, and there were a few Rev3 owners, we could chip in and buy the ECU ?

Anyone willing ?

That sounds like a plan, if 4 of us chipped in £20 each and bought an ecu to donate with the understanding they would get the first batch of finished dataloggers and maybe a slight discount?

I'd be up for that as i'm about to start a rev3 ecu conversion and the datalogger would be handy!

3 other people fancy it........?

[Rikki]

For £20, yeah

[murf]

Smashing the myth that Scotsmen are tight, that make 2 of us!
Welsha??