a/d convertor for creating L1, L2 and L3 outputs for the auto ect

[Whiplash]

does anyone know how to make an a/d converter to generate L1, L2 and L3 outputs for my auto ect ecu. it is a binary representation of:

L1 -GND - fully closed 12V
fully closed to open 12V to 0V
fully open 0V

L2 -GND - fully closed 12V
fully closed to open 12V to 0V to 12V
fully open 12V

L3 -GND - fully closed 12V
fully closed to open 12V to 0V to 12V to 0V to 12V
fully open 12V

if anyone knows if its avaliable or if anyone knows how to make it that would be great!

[sideshow]

why do u need the l1 and l2 and l3

they are communitcation between engine ecu and other ecus

u said in the pm that u want to fit a shift box

i dont know y u need these then


what ecus have u got and what are you tryin to acheive

im pretty sure these is an easier way to do things than what u are tryin to do at the moment

[Whiplash]

why do u need the l1 and l2 and l3

they are communitcation between engine ecu and other ecus

u said in the pm that u want to fit a shift box

i dont know y u need these then


what ecus have u got and what are you tryin to acheive

im pretty sure these is an easier way to do things than what u are tryin to do at the moment

not a shift box but the original 7mgte ect ecu. it needs these signals to determain how open the throttlebody is and enables shifting points and kickdown. it is created from the 3 tps signals VTA, VCC and E2 which go into the main computer to pop out these signals for the auto.

got an auto 2jzgte running a 7mgte gearbox using the 7mgte ect ecu. its the same complication you get when running an stand alone aftermarket ecu on 7mgte autos. i know i can use the 7mgte ecu to obtain the outputs but im really not game to run 3 computers in the car

everything else is hooked up just need those 3 signals

[sideshow]

does it drive without those 3 wires

[sideshow]

much easier runing a shift box
or even fiittin an aftyermarket ecu just for the transmission

would have been much easier job to run the 2jz auto

thats y these problems occur

i guess i was wrong when i said
their was an easier way to do it

well there is just buy a fully programmable ecu for the auto

looks like your on your own

[Whiplash]

it does drive without it but does not kickdown and i cant feel it changing gears. . i still have to work a few other problems out but im just really tring to get ahead of myself. i needa take it for a decent dive but i have feelings that it aint working properly.

other problems are boost leaks out the bov and cooler pipes keep blowing off under normal boost so have to get pipes lipped.

2j auto has difficulties of customising a tailshaft which i dont like doing. i am thinking about making my own hybrid gearbox but i dont really want to. will see how we go later down the track

[Whiplash]

was just pondering a sec ago and came up with these outputs for L1 L2 and L3. can anyone else confirm if these are right as i am just guessing from information from tsrm.



i still need to find someone with an a70 to check outputs recieved form the tps to the ecu to determain what values from tps create these outputs

[Viper]

1).
Programmable PIC controlling 5 replays?
Would be the easiest, but probably not the cheapest solution.

2).
4 seperate circuits. This is just a guess, no idea of it will work
Get 4 replays that trigger on minimal voltage. Add resistors so each triggers at a different TPS value. Then setup each relay to control a certain combination of lines.
For the 0V, zener diode to get to trigger the replay... dunno.. need to think some more

Would have to be careful with the triggering points... hmmm, maybe not the best solution...

[RA35GT]

G'Day mate,

This info is from autoshop101's tech articles. It shows you the outputs of L1, L2 and L3 and the TPS. (As you can see its not a linear scale, the high level voltage is also different in this case).

I have gone through this recently (for another project) and I don't beleive it would be too difficult to set this up using a PICAXE chip. I can program a chip for you if you like?

Rudi

[sideshow]

customizing tailshaft is easy if they know what to do


ive wired up many cars with that rubber bung and they all have a tailshaft made for them

[Whiplash]

G'Day mate,

This info is from autoshop101's tech articles. It shows you the outputs of L1, L2 and L3 and the TPS. (As you can see its not a linear scale, the high level voltage is also different in this case).

I have gone through this recently (for another project) and I don't beleive it would be too difficult to set this up using a PICAXE chip. I can program a chip for you if you like?

Rudi

yer cheers rudi that be great if you could try program one up for me. solve many issues i didnt think it was as easy as how i stated and wasnt sure how the voltages change over the opening rate. reason why i was asking someone to help me out by donating their car to be tested. all the information i got was from the other side of the ecu where it meets up at the ect ecu. page at-29 of the tsrm states the vales for testing the voltages at the ect plug. keep in touch rudi!

[Whiplash]

customizing tailshaft is easy if they know what to do


ive wired up many cars with that rubber bung and they all have a tailshaft made for them

dude i appreciate you helping and all but i dont want to make up a tailshaft. i dont want to try bolt on the other autos. if this cant be done then it cant be done then i will reproduce a hybrid gearbox for the car but all i want is to try duplicate these signals for the auto ect. thats all i want.

[whatthe?]

Wouldnt it just be easier to use the factory ECU for the box? I mean, I know it's bulky and all but it works.... Chop out the loomage for everything else, it'll still be neat

[Whiplash]

that was the other option is to use the 7mgte ecu along with the ect ecu to run the box. use the 7mgte engine ecu as the a/d converter and the 2jzgte ecu as the engine controller

ive also found by reading that tech article that rudi got the pic from there is a direct tps which has the L1 L2 and L3 outputs. you guys think that it could be possible to use this type of tps in replacement of the 2jz tps?

im actually heading to the point of wher ethe 7mgte engine ecu might need to be used as there are a few other elements that the ct ecu needs i think. temp sensor being one of them.

thanks for letting me know bout that thread very informative

[sideshow]

ok cool

let us know when u sort it out

ill be thinking of ya heheheheheeheheheh