i need to know if the atts has a control unit separate from the ecu? i think it does,the wire harnesseshave the same part numbers, so it cant be in the ecu, because if it was it would have inputs somewhere. so if anyone has a clue where the atts control unit actually is on the car...that would be great, or if anyone alreaedy knows. thanks in advance

 

The atts control unit is right next to the main ecu.

 

so that, plus all of the neccessary parts would be all i would need if i wanted to hook up atts on an obd1 ecu?

 

Well for one thing, you have to use the stock SH obd2 ecu for atts to function.

 

why if the engine has its own computer, it which is exactly the same as the base preludes computer? it has its own computer, which must be separate from the ecu, if it wasnt completely separate then the ecu's wire harness would have to be different to incompass the new inputs from all of the atts sensors. if its not the same, then i would assume that you could maybe run the obd1 h22a ecu (i dont know the name/partnumber) its pretty much the same right? just that it is a closed deck correct? please chime in people as long as theres flamin or bitchin.

 

anyone

 

It wont work. There is no output on an OBD1 for the ATTS. The main ECU still needs to "talk" to the ATTS.

 

what inputs does it need from the ecu? i would assume that it would need to talk to the ecu only so that it knows when/if there is a cel or anything else that would let it know to disable itself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeremiah87 &raquo;</TD></TR><TR><TD CLASS="quote">i would assume that it would need to talk to the ecu only so that it knows when/if there is a cel or anything else that would let it know to disable itself. </TD></TR></TABLE>

^that input right there. without my Helms i cant say for sure what else connections go between the main ECU and the ATTS ECU.

also, how are you going to mount the ATTS unit on an OBD1 block?

 

lets just say that was already taken care of. where can i get a copy of the helms manual? why would it not work w/o that single input...if thats the only real one that it needs? i doubt that atts would not be active if it was missing that one input to turn itself off. if it did need it and that was the only other input that it needed, then, (since every type of electrical signal is basicaly just a frequency...series of ons and offs right?) couldnt i just make something that would have the same frequency output as the disabling input from the ecu, then find out what the disable signal is and send that signal if there was ever a misfire or anything that would normally disable atts? im not the best with words, so if i need to re write just say so

 

sounds simple enough. goodluck with it.

i will check when i get home from work what all connections run between the 2 ecus, but for future reference

Helms.. http://www.helminc.com

or if you search you might find it free online somewhere, i have seen links on here before

 

thanks and let me know what connections are going between the ecu and the atts comp.

 

after looking at the diagram, it just wont work without spending tons of $ and time. there are 4 main ECU connections, including (?)VREF, FI-TX, FI-RX and ICM. then you have the sensor connections like MAP sensor, Yaw rate sensor, front/rear wheel sensor, lateral g sensor, steering angle sensor. PLUS ABS, parking brake, and fuse box connections.

So unless your dropping an OBD1 into an SH body or have the time and money to swap all these sensors that are SH specific and add all the other connections, the only way to have ATTS is to buy an SH.

 

VREF, FI-TX, FI-RX and ICM...are these connectors on any obd1 ecus?

 

could someone please put up som more info about those connectors? please thanks

 

you know I posted something like this on Hondata but, if someone can post a wire diagram i too have a eye brow up