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JZX100 auto ecu gear inputs

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Old Oct 3, 2014 | 09:36 PM
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Default JZX100 auto ecu gear inputs

Hey Guys,

this is probably a longshot, but I am hoping to find someone who has done this / knows the ECU a bit better than me.

I am having idling issues after driving with my 1jz vvti swap (JZX100) with the auto ecu and one of the diagrams i found has the pinout for the auto ECU. I have read that shorting the auto ECU to think it is in 2nd gear is the trick to fixing the idling issues after driving the car around a bit (always good idle from a fresh crank).

Basically my question is, does anyone know if the 2nd gear input pin is a sinking or sourcing input? Does the pin (#G connector pin '2') need to be grounded or does it need to have 12V hooked into it to have the ECU think it is in 2nd gear?

thanks
Marko

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Old Oct 7, 2014 | 04:52 PM
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My 1JZ GTE JZZ30 outputs battery voltage on the ECU pins for tranny solenoids. The other end of the solenoid is grounded at the tranny. Don't forget though, that it is a 12v OUTPUT, not input (obviously). So, I don't see how you can trick the ecu into thinking that it is in 2nd gear. The ECU commands it to be in second gear. I am assuming your VVTI is same
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