supra mkivtt (2jzgte) idle valve settings?

[Riki]

Does someone know what kind of settings and which outputs should I use with supra (2jzgte) stock idle valve motor?

Thanks!

[MRMRacing]

Riki, you should use the stepper outputs (1 to 4) , it seems like try and error untill you get it working. I am also looking for proper Spra IAC settings.

[b18cls1]

is this the 6 wire one??

[Riki]

is this the 6 wire one??

Yes, two of them are +12v ignition wires.

[Wroom]

Following is a quick guide to setting up a stepper for the SM4:

The pattern should look something like:

1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
The problem is to find out in wich order the outputs should be energized.

Set "Power up recal mode" to "Preferred dir", and "Preferred dir" to "Fully open". Then use "Stepper Reset(Full)" to see if the stepper can open and close the full range to check for the right pin order. If incorrect, then swap two of the outputs in the O/P table or in the pattern table at a time until it works.

One can also "half step" the IAC stepper. This gives double the resolution of the stepper, but is a little more sensitive to voltage dips.
Pattern can look something like this:

1 1 0 0 0 0 0 1
0 1 1 1 0 0 0 0
0 0 0 1 1 1 0 0
0 0 0 0 0 1 1 1
To find the stepper travel range, set a reasonable value, like 200, do a "Stepper Reset(Full)" twice. Listen to the stepper if it sounds different at the end of the travel. If no, increase travel. If it changes in sound at the end then decrease the travel until that "end travel noise" disappears.

Be sure to set "Min stepping volts" to a value that the stepper can secure work on, like somewhere between 8 to 10 Volts. Otherwise one will get idle rpm issues caused by fans, AC clutch, ABS servo and other high current consumers starting up.

[Riki]

I have kind of a strange problem... When I select stepper output for iac from the output menu and choose outputs 1-4 for stepper. And when I try to do "stepper reset (full)" my fuel pump goes on. Does someone have an idea what would cause this strange thing?

[Wroom]

I have kind of a strange problem... When I select stepper output for iac from the output menu and choose outputs 1-4 for stepper. And when I try to do "stepper reset (full)" my fuel pump goes on. Does someone have an idea what would cause this strange thing?
Are the output that drives the fuel pump also assigned in for the IAC stepper?

[Riki]

Are the output that drives the fuel pump also assigned in for the IAC stepper?

No, the problem was with my relays wiring. The idle motor is working now, at least when the engine is warm. Got to try again tomorrow when engine has cooled down.

[Wroom]

Ok. Good that you found it.

[Riki]

Next question :D
Do you guys know what is the correct setup for supras speed sensor? I have it connected to HSI3, but when I look with my laptop it shows 0 kph.

[supercowboy]

Following is a quick guide to setting up a stepper for the SM4:

The pattern should look something like:

1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
The problem is to find out in wich order the outputs should be energized.

Set "Power up recal mode" to "Preferred dir", and "Preferred dir" to "Fully open". Then use "Stepper Reset(Full)" to see if the stepper can open and close the full range to check for the right pin order. If incorrect, then swap two of the outputs in the O/P table or in the pattern table at a time until it works.

One can also "half step" the IAC stepper. This gives double the resolution of the stepper, but is a little more sensitive to voltage dips.
Pattern can look something like this:

1 1 0 0 0 0 0 1
0 1 1 1 0 0 0 0
0 0 0 1 1 1 0 0
0 0 0 0 0 1 1 1
To find the stepper travel range, set a reasonable value, like 200, do a "Stepper Reset(Full)" twice. Listen to the stepper if it sounds different at the end of the travel. If no, increase travel. If it changes in sound at the end then decrease the travel until that "end travel noise" disappears.

Be sure to set "Min stepping volts" to a value that the stepper can secure work on, like somewhere between 8 to 10 Volts. Otherwise one will get idle rpm issues caused by fans, AC clutch, ABS servo and other high current consumers starting up.


Do you know which wires go where on the solenoid. Mine is a 6 wire. I think its wired wrong. my stepper motor gets really hot.