1994 supra with uaEFI

[gurov]

This is my "adapter" that i'm going with.

Base is a 1uz-fe ECU out of whatever (sc400 / soarer or some such) that cost me $50-ish from ebay. I desoldered all of the throughhole components, and then used my smd rework to remove all of the SMD components.

I then i traced all the pins from the ecu connector to where they end up on the board, sometimes adding a bridge or two where SMD components were to get it to terminate at a through hole.


carrier board, with whatever sockets i had around the bench, clearly there arent' that many pins

carrier board bolted to the ECU

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the pins on the UAEFI

2.5mm pins in the molex holes at odd angles

img_4178.jpg (596.38 KiB) Viewed 19621 times

uaefi sitting on the carrier board, blue bunch is injectors, yellow bunch is ignition, red bunch is stepper idle, green is mostly sensors

closeup of the board

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and it sitting hooked up to my testing bench(floor)

bench setup

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would be neat to have this more SMD, and less hack, but just the connector for this ECU is $110 new without any kind of enclosure.

this will do for the time being.

[AndreyB]

Whag is the eBay query for me purchase a similar $50ish donor?

[gurov]

1uz-fe ecu
2jz ecu
aristo ecu
sc300 ecu
sc400 ecu
ls400 ecu
soarer ecu
toyota crown ecu

the connector is a 120pin, these are from non-vvti 2jz-gte engines and 2jz-ge engines as well as 1uz-fe42

the pin outs are somewhat close, for sensors and pickups, actuators are a bit different story, few injectors line up, few ignitions line up.

stock they are vr pickup , crank 12 teeth , and two cam sensors on intake cam. mine is converted to hall sensors, and i’m using hall1 and hall2 inputs with 1k pull-up to 12v.


they are somewhat difficult to find at that $50 price.

the connector is available https://www.driftmotion.com/2JZ-ECU-Header-Connector-120-Pin-p/dm1264.htm

price point for these ecus for the supra are in the $2k

https://www.realstreetperformance.com/aem-series-2-p-p-ems-toyota-93-97-supra-twin-turbo-2jzgte.html

https://www.diyautotune.com/product/megasquirtpnp-pro-jz9298-for-the-93-98-toyota-supra-manual-trans/

are the other two i have working on this car that are commercial.

the speeduino is using stock ecu board that came with my car, and i took over the logic pins from the stock logic board to fire stock injector mosfets, using stock voltage dividers for iat/clt. using whatever passives are there for protection for tps/etc. using the 12 to 5 regulator from the stock ecu to power the atmega2560 in the speeduino. that one is running waste spark/waste fuel, cause it’s 4x4.

[AndreyB]

Just got myself one thank you!

there would be some oddities to handle, like stock fuel pump control is a 5v pwm signal to the stock fuel pump ecu. stock throttle body has a 2nd butterfly that’s drive by wire that is used by traction control system stock, no ecu supports that i’ve seen. there’s a cleaner up signal from abs wheel sensors right by the stock ecu for figuring out slip %
and the stock extra 4 or so actuators to drive the twin turbo sequential setup.

[AndreyB]

let me know if you want more infos.

Can you help making an interactive pinout similar to https://rusefi.com/docs/pinouts/miata-nc/ and https://rusefi.com/docs/pinouts/Toyota-JZS161/?

First step is picking up a good folder name similar to "miata-nc" or "Toyota-JZS161". Second step is making a set of similar straight photos of the ECU connectors.

[gurov]

lets call this: 2JZ-GTE-NON-VVTI

2jz-gte-pinout.pdf

supra jza80 / aristo jzs147 2jz-gte non-VVTI ECU pinout

(141.67 KiB) Downloaded 34 times

what's the software to make the interactive pinout ?

additions to that:

80 pin - 28 = MAF
80 pin - 47 = o2 #2

40 pin = 16 - tach out

idle = 32 + 34 = coil 1
idle = 33 + 35 = coil 2


plug names

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80 pin:

80 pin

jza80-80pin.jpg (248.36 KiB) Viewed 19566 times

40 pin:

40 pin

jza80-40pin.jpg (179.32 KiB) Viewed 19566 times

[gurov]

there was a question about A under the 40 pin connector and whether there's a B,

out of this pile, top to bottom

USDM 2jz-gte 6MT supra = A
JDM 2jz-gte Aristo ?? trans = B
diyautotune ms3pro pnp = A
AEM EMS v2 supra = A

ecu pile

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only the JDM ECU seems to be B, no difference between them that i could spot.

A - B

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[AndreyB]

plug names

I am confused if that image is looking at wire side of plugs or female terminal side of plugs?

headers have 1 to 40 on them but toyota went 1 to 80? do they at least match the plastic in the 1-40 region?

bottom line is https://rusefi.com/docs/pinouts/Toyota-JZA80/ right in terms of pins placement?

[gurov]

there are 3 plugs total. 2 are paired connected with a bolt between them


this is the 40 pin - IGNSW- pin 1 is being held

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this is the 80 pin - pin4, ground is being held:

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this is how they go in:

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the pinout link is accurate.

[gurov]

the only reason i even brought up 1uz-fe engines is cause for a few years, probably while partsbin was real hot, there was a shared ECU, probably before VVTI was bolted onto the V8s. the connector is really the main thing i was after even looking at the V8. i don't think there's very many desireable cars with this ECU and 1uz-fe engine that anybody would look at.


i've found only a few identical pins V8 to the 6 cylinder engines, and that's 1-4 injector, TPS, IAT, CLT, o2, crank/cam1/cam2, ignition switch (40-1), battery power (40-33), switched power (40-31 + 32) , main relay (40-24, this one needs 12v to actuate) fuel pump speed (40-22), grounds.

[AndreyB]

Should anything be improved on https://rusefi.com/docs/pinouts/Toyota-JZA80/ ?

source files https://github.com/rusefi/rusefi-hardware/tree/main/Toyota-JZA80/connectors

[gurov]

position sensor grounds are all tied together.

so type should be same for all 3 grounds.

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for stepper valve, indicate which coil is which:

32 + 34 = IAC_coil1
33 + 35 = IAC_coil2

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47 + 48 are oxygen sensors, they are def used

not totally sure which one is which on the harness.

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fuel pump control is PNP 5v PWM that sets speed:

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E9-66 is MAF ( need to verify )

[AndreyB]

All noted https://github.com/rusefi/rusefi-hardware/commit/95297b830ba759267c472270da6f90960ef225fd

[gurov]

IMG_4277.jpeg (237.57 KiB) Viewed 19067 times

add e9-28 as a ground. seems to be a dedicated ground for the maf that’s not listed in any of the lists

[AndreyB]

add e9-28 as a ground. seems to be a dedicated ground for the maf that’s not listed in any of the lists

https://github.com/rusefi/rusefi-hardware/commit/2ef89c02a49720fcf6932ffe772039bc11f31ddc

[AndreyB]

I had to drill the PCB out of the case, they must be soldering PCB after header is bolted to case and everything is locked together?

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[gurov]

It's alive and runs and idles:

like 2nd or 3rd startup:

headphone warning on all of these.





idle short

https://youtube.com/shorts/Xxg6QUtrjys


rev and back to idle from the engine bay:




tune is here: https://rusefi.com/online/view.php?msq=1613

36-2 crank wheel (off a VVTi engine) , 1 cam tooth (like stock non-vvti) , using HALL sensors (they look kinda like honeywell sensors, but aren't)

input into uaefi is hall1/hall2, 1k pullup

[gurov]

from the logs, i'm seeing RPM "stairstep" 50ms between updates, TPS is much smoother, MAP is 10ms between updates.

WHITE line is RPM
RED is MAP
GREEN is TPS

log resolution seems to be around 5ms, which is how often the green line seems to be changing.

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is that expected ?

[AndreyB]

rusEFI is an engine control unit. We do not have an SLA for RPM refresh rate in logs

I wonder if it would change with RPM change.

Good question what are the most useful metrics for an ECU evaluation.

[gurov]

hmmm, so RPM, MAP, AFR, BATV, PW, IGNTIMING

here's what happens when there's a stairstep like that, more vague images coming:

this CHUNK of data; don't worry what the actual values are, shape is more important:

image.png (7.9 KiB) Viewed 18959 times

in MLV, that produces a MAP TRAIL, that is overlayed on the VE map:

image.png (34.38 KiB) Viewed 18959 times

that exhibits an unnatural pattern of bunching engine state into artificial verticals concentrated on the RPM not updating fast enough in the logs.

[mck1117]

RPM updates once per engine cycle, unless the option "always use instant RPM" is selected in the experimental settings. I've endurance raced on that setting so it's probably fine to use.

MAP updates once per cylinder, since it averages pressure over an angle window (configurable with the MAP sampling tables) for each cylinder event.

[gurov]

awesome ! thank you !

[gurov]

RPM updates once per engine cycle, unless the option "always use instant RPM" is selected in the experimental settings. I've endurance raced on that setting so it's probably fine to use.

MAP updates once per cylinder, since it averages pressure over an angle window (configurable with the MAP sampling tables) for each cylinder event.

how about AFR ? any averaging there that you know of ?

[AndreyB]

Look what has arrived

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