I'm contemplating using an Auto-Tps on the emu .. need some help :)

HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
Hey lads,

Ok so i have an ep91 with an emu setep.. now im going to try & wire an auto tps to it so that i can see if i can get variable data from the tps as opposed to the stock on/off.

Ok i was wondering, can anybody post up what the 4 signal wires from the tps are, so that i could splice them into the main harness :)

Thanks
Kon
 
sanchez

sanchez

Member +
Sorry to spam mate, but whats the differences between these, always see people saying but not sure why :homer: lol
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
thanks keiran, i had already had a look at that, but thanks for the link, it will be handy to have in one thread :)..

what im wondering though is the following:

considering the following ep91 diagram:
http://i141.photobucket.com/albums/r62/fishman_photos/GT/glanzaecu.jpg

& the following tps diagram:
http://img.photobucket.com/albums/v305/speedfreaq/TPS.jpg

GND = ground from ecu,
IDL = connect to idle pin ..(pin 12 from the 16-pin connector)
VTA = connecto to PSW pin (pin 10 from the 16-pin connector)
VCC = connecto to VCC pin (pin 11 from the 16-pin connector)

Is the above correct? or am i assuming incorrectly?

thanks
Kon
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
The manual tps is either in On or Off state.. the auto tps is a variable unit which allows for better throttle calibration & setting, making it much easier for tuning at various throttle points.

Kon
 
Chris@CCM

Chris@CCM

Member +
i think this will work ok cos of the 4 pins one should 0-100% and one just shows idle i just wired one up to the haltech
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
thats what i was thinking chris, after all the auto ecu only has 1 extra pin & thats so that it knows that its in "park" mode.. now all i need is a sensor & clip :haha:

kon
 
Sheldon

Sheldon

Malta Area Rep.
but would you be able to send a 0 signal and 100 signal to the stock ecu so it will work fine? if no it will see it as there is no tps..

im not sure just my 2p. and i think i have one kon.. with clip too
 
azerty

azerty

Supermoderator
the main problem you will occur is the fact signal is inverted.
On/off TPS is reverse mode (means it is 5 volts on iddle and 0 volt on WOT) while auto TPS (progressive) is normal type (0 volt on iddle then 5 volts on WOT)
We had one wired as we were using a Haltech PS1000 then removed it and installed an EMU again. so we tried to see if auto TPS would work on EMU. EMU can cope with it no problem in fact, just need to choose normal mode. but then signal sent to ECU will still be the same (as TPS wire is splice to EMU not cut) and the ECU will think you are WOT while you are at iddle. Unless we can find a way to invert signal sent to ECU, maybe using analog input ? something like from 0 to 3 volts TPS signal EMU would need to send a 5 volts signal to ECU then from 3 volts to 5 volts TPS signal EMU would need to send 0 volts signal to ECU. need to think about it

cheers
 
Last edited:
Sheldon

Sheldon

Malta Area Rep.
After looking a bit on the ECU pinouts supplied with the EMU manual.

the same wireing is used on the ep91 MT ecu and EP82 AUTO ecu (1995)

as we know, ep91 and ep82auto'95 ecus are 3 plug type.

BUT on the ep91 pinout there is a small *1 near TH meaning only on Manual ECU.

but then again why its the same on the ep82 euto one???

anyone tried this diagram?

http://img.photobucket.com/albums/v3...dfreaq/TPS.jpg

cos it might work perfectly fine...

anyone has an ep82 1995 auto wireing diagram!? that would be very helpfull, meanwhile i will test the diagram above (when i have some spare time that is!!!)
 
Sheldon

Sheldon

Malta Area Rep.
azerty said:
the main problem you will occur is the fact signal is inverted.
On/off TPS is reverse mode (means it is 5 volts on iddle and 0 volt on WOT) while auto TPS (progressive) is normal type (0 volt on iddle then 5 volts on WOT)
We had one wired as we were using a Haltech PS1000 then removed it and installed an EMU again. so we tried to see if auto TPS would work on EMU. EMU can cope with it no problem in fact, just need to choose normal mode. but then signal sent to ECU will still be the same (as TPS wire is splice to EMU not cut) and the ECU will think you are WOT while you are at iddle. Unless we can find a way to invert signal sent to ECU, maybe using analog input ? something like from 0 to 3 volts TPS signal EMU would need to send a 5 volts signal to ECU then from 3 volts to 5 volts TPS signal EMU would need to send 0 volts signal to ECU. need to think about it

cheers
Click to expand...

what way did you wire it ? like this ?

TPS.jpg
 
weeJohn

weeJohn

Lifer
Have a look on here Kon, technical articles, engine controls - input sensors

http://www.autoshop101.com/

Looks like the 4 wire has the idle signal the opposite way round from the TPS switch type. The only way I think you could get around this is to connect VCC to the E2 connection and E2 to the VCC wire, that would give you the correct IDL signal but reverse the potentiometer opperation. You would then need to make full throttle 0% and closed 100%
 
Sheldon

Sheldon

Malta Area Rep.
weeJohn said:
Have a look on here Kon, technical articles, engine controls - input sensors

http://www.autoshop101.com/

Looks like the 4 wire has the idle signal the opposite way round from the TPS switch type. The only way I think you could get around this is to connect VCC to the E2 connection and E2 to the VCC wire, that would give you the correct IDL signal but reverse the potentiometer opperation. You would then need to make full throttle 0% and closed 100%
Click to expand...

that would be easy as you can choose that on the EMU :) will see into this too..
 
Sheldon

Sheldon

Malta Area Rep.
did some continuity test witht he multimeter, and there is the idl that shows closed throttle and open throttle like the 3 wire tps. but then i didnt find any other wire that signals continuity on WOT on the 4 pin type GRR. was a quick test as i was in a rush, will keep searching and testing, if all fails, il see if i can build a small board and get signals from the 4 wire to output what we want to the stock ecu, actual readings to the EMU. thats the last option.
 
weeJohn

weeJohn

Lifer
Sheldon said:
did some continuity test witht he multimeter, and there is the idl that shows closed throttle and open throttle like the 3 wire tps. but then i didnt find any other wire that signals continuity on WOT on the 4 pin type GRR. was a quick test as i was in a rush, will keep searching and testing, if all fails, il see if i can build a small board and get signals from the 4 wire to output what we want to the stock ecu, actual readings to the EMU. thats the last option.
Click to expand...

Does it need to see a signal for wide open throttle if its using the percentage reading?
 
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