JECS ROM Download

[NoCtrl]

So, does anyone know for shure witch processor(type/family) are used?

Is it Mitsubishi/Renesas M32 ? (32bit risc..)

ROM, RAM,IO configuration?

Are there any 'dumps' out there?
A orginal Subaru version update for ANY of the JECTs would do just fine
(I just guess they have distributed software upgrades in a electric way)

[west_minist]

The micro stated UJ. So not sure if it is a re-brand, but I doubt it.

I could find any info on the net w/ it.

Manufactures normally stamp their name on the processors.

Hopefully, cboles will be able to shed some light on this matter.

[Spiider]

Its the "ex-Mitsubishi now Renesas" M32/150. Mitsubishi was bought out by Renesas and now its hard to get info on the older MPU.

I posted some info about it on here a week or two ago.

[west_minist]

But what is the UJ business. I saw none of those names.

[cboles]

UJ = Unisia JECS

[west_minist]

I know. so no mitsu...

[cboles]

It's just a relabeled chip. This happens all of the time, especially if you buy chips preprogrammed from the manufacturer or a distributor. I've done it on a couple products I've done in the past.

[west_minist]

Ok. How are you coming along with it?

[west_minist]

Hey spiider, here the trouble area that have been plaguing me from day one. I even think it came about when I upgraded my exhaust. I cannot remember feeling it. Had the car only stock for a week.

Damn close loop. Fuel controller do not work in that area, except for some throttle input,, except full throttle to go close loop.

Subaru had a trainee working on this map. If you knock, pull timing or add fuel. Adding fuel seems more realistic w/ a tab of -ne timing. But no, pulling timing and have the car feel like it want fuel. Also became aware of other JDM imports having the same problem in that region.

I must try a fuel race fuel and see what happens. Tried it once and the sluggishness wasn't there, not completely gone either, but the close loop afr seems to be 14.7+ in that region. The afr wb meter reads up to 15+ in that region.

I will sometimes here a series of pinging ad may not even register a knock, but no constant knock signatures in that region.

What is the ecu picking to drop the timing if no knock is register, at least for logging.

This is what I want to correct, it I can.
I am wondering if to add a Adj. Fuel reg, but the beautiful ecu would take the fuel out any way. it is now that I wish I had a Toyota ecu .

Driving in that region feels really really sluggish. The rpm ramps are my auto tranny. The region makes the car feel like it have a turbo.

[Spiider]

You must have something going on if you have that much KC.
I don't think it uses much else except the knock sensor.

I had issues like surging etc until I redid my OL/CL stuff.

[west_minist]

I drove the car today and it saw a/f dips to 15+, some 16's too.

I disconnect the fuel controller and I did not had the conditions to drive the car to produce it. Put back on the fuel controller and problem is gone to some point.

I will try runing w/o the FC and see what happens, but something going on there. Will keep you up to date.

But question, for every ping you hear, should there be a knock signal?

[Spiider]

I don't know if you are logging fast enough to pick up every ping that the ecu is seeing.

Even if you could log knock at 100ms, the ecu is operating in the ns/operation range.

You may see it better with a "knocklink", or an amplifier hooked up to an led that blinks when it hears knock.

[west_minist]

Here is the log w/ fc.

Same problem still.

I only log what I wanted and for speed.

[west_minist]

This evening I added 12ml of Acetone to a 3/4 tank of gas, alreacy containing 2gal of vp 102. Will see what this will do, but unfortunate;y, I added it w/ a small quantity of vp 102 gas. So I will have to see when all the gas is gone and I add in 1gal of vp 102, 28ml of Aceone, what the knock correction will look like.

Colby, I look foward to your success w/ pulling the JECS rom.

[west_minist]

I have a question.

For the 99/00 ecu's, would the reflash technique of the ecu be any different to later models?