I swear, this is going to be "stupid and simple" when you find it. The ECU is not powering up. And we KNOW it has something to do with wiring, there is nothing else it can be. And I do agree with the idea of testing grounds to the ECU as well.


ALSO, one thing you can check (this will verify grounds and 12 volt supply) is to look at C3 pins 39, 25, 22 and C4 pins 19, 40. ALL OF THESE must have 5 volts (4.5 to 5.5 volts is OK) on them with the key ON.

• If they have nothing, your ECU has no power.
• If they have more than 7 volts, you have a missing ground to the ECU.
  
  

ONE MORE TIME, all those pins MUST have 5 volts on them, the ECU puts out 5 volts to each of the, they feed sensors and those sensors then send back voltage on other pins, to tell the ECU what is going on . If there is no voltage or TOO MUCH voltage on one more, you found your problem.


I see my photo, try reloading the page. If you are on a phone, get to a real computer.