Well, my ATTS took a shyt on me about a week ago and I figure that I have a few options. I planned on replacing it with a used unit from the local junkyard, but now that I have the whole thing out, I am thinking I don’t want to gamble with a used unit and have to pull the p.o.s. in a month because of failure… so I am now thinking half shaft and adapter plate.

From what I have gathered, and correct me if I am wrong, I would need to obtain a fabricated adapter plate and this plate would attach everything found in #12

to the back of my SH block, thus making the car a base model in driveshaft terms. Does this need to run to a base m2y4 or my sh tranny?

What about the ATTS code and light situation. Can I just remove the ATTS ECU and rid my self of the code and light? This wont fahq up my emissions will it?

I really think this is the way to go if there are no emissions problems. Anyone have any other suggestions? The Type S is tempting...

Modified by arkosh.kovash at 5:14 PM 11/13/2006


Modified by arkosh.kovash at 5:27 PM 11/13/2006

 

You will need the base tranny to go with the intermediate shaft. If you remove the ATTS ECU it should get rid of the ATTS light. Dont think you can buy a Type-S and have a happy ATTS unit. I bought my Type-S and have had the ATTS light on since, but im removing the ATTS anywyas so its cool.

 

I was joking about the Type S stuff. I will rebuild before I do that. So a new transmission huh? Well thanks for the feedback. I guess I misunderstood that dropping the ATTS unit inherenlty means replacing the transmission if you want a functioning car.

 

That is correct. The output of the SH transmission will not mate up with a base model intermediate shaft, but you can install a base tranny and use the base intermediate shaft with an adapter plate. We did that on our other track car, which is an SH.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Revi &raquo;</TD></TR><TR><TD CLASS="quote">You will need the base tranny to go with the intermediate shaft. If you remove the ATTS ECU it should get rid of the ATTS light. Dont think you can buy a Type-S and have a happy ATTS unit. I bought my Type-S and have had the ATTS light on since, but im removing the ATTS anywyas so its cool.</TD></TR></TABLE>

Something had to be wired incorrectly....the atts should work in both cars just fine....

 

So what trannys will bolt up to the SH block? Of course the search function doesnt search for small words like "SH" so it is hard to find info on the trannys. tia

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">

Something had to be wired incorrectly....the atts should work in both cars just fine....</TD></TR></TABLE>

Its not wired incorrectly, the ATTS unit barely has any connections and the main wire harness connector was never disconected. The ATTS ECU will throw codes for MAP sensor, PGMFI and lots of other sensors that read different from US H22s.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by arkosh.kovash &raquo;</TD></TR><TR><TD CLASS="quote">So what trannys will bolt up to the SH block? Of course the search function doesnt search for small words like "SH" so it is hard to find info on the trannys. tia</TD></TR></TABLE>

I believe any H22/H23 tranny will bolt on if the base tranny can. You just cant use the SH tranny because the intermediate shaft will not work.

 

There are no sensors that read "different" between US and JDM h22s...so try again

OP: any of the transmissions that will bolt up to H/F blocks will bolt up to the SH block, but like you already know, you need the adapter plate for the intermediate shaft....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">There are no sensors that read "different" between US and JDM h22s...so try again

OP: any of the transmissions that will bolt up to H/F blocks will bolt up to the SH block, but like you already know, you need the adapter plate for the intermediate shaft....</TD></TR></TABLE>

If the sensors between the Type-S and the US H22 read the same, the why the different ECU? We are talking Type-S which has different fuel and timming maps, not the regular JDM H22. I find your statement hard to believe.

 

By the way the US ATTS ECU and the JDM ATTS ECU have different serial numbers. I had someone with a JDM ATTS ECU compare theirs to my US ECU.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Revi &raquo;</TD></TR><TR><TD CLASS="quote">

If the sensors between the Type-S and the US H22 read the same, the why the different ECU? We are talking Type-S which has different fuel and timming maps, not the regular JDM H22. I find your statement hard to believe.</TD></TR></TABLE>

The sensors all still read the same, as do most honda sensors (even between different cars). The ecu having different maps in it has nothing to do with the sensors that give input to the ecu.....

(on a side note, fyi, and not that i care a whole lot, just for your sake, timing is spelled with one M....)

 

I dont think you know what happens when you run the US ECU with the Type-S motor. It will throw codes left and right. Where does the ECU get its info from? The sensors. The sensors might be the same but the data being transmitted is different. It makes no sense to have a different ECU for a motor if no data changes between them.

And i could care less about spelling in this forum.

 

I'm gonna pm you, lets stop clogging up this guy's thread

 

No keep this info in this thread! We barely have any info on SHs let alone ATTS units in this forum. This guy is problably finding this info useful, i know i am.

 

i actually am finding this useful. these are the types of questions i am asking myself when considering a Type S swap... if it ever comes to that -now that i realize how hard a h22a4 USDM low mileage engine is to find.

rant on

 

ok then....pm i just sent him:The sensors that send input to the ecu are all the same, you are suggesting that there are things that read very different off a type S engine than off a regular h22, and that the ATTS ecu checks for them.....that is where you are wrong

The atts ecu does not care about anything other than vehicle speed, and since the VSS is the same for both motors, and speed is read the same in both places, the atts is not effected (edit: I could be very wrong here, i need to check wiring diagrams)

I would like to know what codes it throws though, if you bothered to check please inform me
The point of having the different ecu is to have different fuel and timing maps, that is it...you can change out all sorts of ecus into your car as long as you adjust the maps.....

Think about it....how would everyone be running p28s and p72s in their prelude for EMSs all the time?? All you adjust with those is the fuel and timing maps, the chip doesn't even know what kind of engine it is running

 

The ATTS will throw codes from PGM-FI communication line to Ignition Voltage. I would like to know why the ATTS looks for these readings if all it cares about is VSS. It even throws pointless codes like Back-up light switch.

 

Im just gonna have to switch the type-s ATTS unit with my old ATTS unit and see if the light goes off. I was hoping to swap ATTS ECUs but i cannot get a hold of a JDM one. Sucks.

Also here is something to think about. I get a ATTS light for the MAP sensor, yet the Engine ECU throws no codes. Wouldnt than mean the ATTS ECU is getting a reading it does not recognize and the Engine ECU is getting a normal reading (Hense running the JDM ECU and the US ATTS ECU with the Type-S motor).

ATTS=Ghey.

 

I need to look into the ATTS's functions more before I make comments like that, I apologize.....

But the things I said about the ecu are true....

 

with so many codes, and random codes being thrown, would that not suggerst a bad ecu?

 

The ECU worked fine with my previous ATTS unit. Ever since i swaped out the different motor and ATTS the light has been on. I had no codes prior to the swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">I need to look into the ATTS's functions more before I make comments like that, I apologize.....

But the things I said about the ecu are true....</TD></TR></TABLE>

I never questioned your ECU statements, they are true. I know this my self also. But the issue is really not with the main ECU is with the ATTS ECU which unfortunately there is very little info on.

 

what about putting the USDM ECU back in? I know there is a timing issue, but wont the ECU adjust to that? I could be a fahqin retard too... just regurgitating stuff I have read in my searching efforts.

 

Using the US Ecu would make it run a bit lean and the timing would be off....not a huge deal, but you wouldn't get the full "type-s" effect.....probably lose a few lbs of tq here and there....