Ecu not receiving power signal... possiable fried #62 ecu?

[koukimonster139]

Originally Posted by teamsprock

relocated lower engine harness (the one with the two black fuse boxes in the enigne bay) into the cabin. Now car won't start.

I would think without looking at it that this is where you should start.


Also, did it get power before the re-flash or did it run using the mines tune before?

Sounds like a wiring mix up

Im also confused where you said "when you turn the key on, the led flashes once", does this mean it is getting power?

[teamsprock]

Originally Posted by koukimonster139

I would think without looking at it that this is where you should start.


Also, did it get power before the re-flash or did it run using the mines tune before?

Sounds like a wiring mix up

Im also confused where you said "when you turn the key on, the led flashes once", does this mean it is getting power?

Ya it ran fine with this exact setup, minus the new intake manifold all last year. So yes the wiring that I changed is exactly where I started and what concerns me the most.

In the bottom of my post I noted that the ecu was getting power via "main ignition power". (The comments on red in the picture are the voltages I measured)

I found this info today so I will start seeing what power sources I might be missing and then figure out from there why they are not there. Probably be this weekend before I get a chance to work on it again.

#62 Ecu pinout:
These pins should have 12v when iginition is on: 4, 25, 38, 46, 47, 109

Pin 34 should have voltage when key is in start position

Grounded Ecu pin's: 6, 13, 39, 48, 107, 108, 116



****UPDATE:
I solved the problem last night and got the car running. Two problems were found. I had a bad ground wire and that is why I was not getting power to pins 38 and 47. But the bigger problem that was keeping my car from running and making me think that my ecu was dead was the screw that switches it between diagnostic mode and regular was right on the line between the two. So once I turned the screw counter clockwise the ecu LED stayed on and things have been running great since then. So yes a working ecu will have the LED light on when the ignition switch is on and then the light shuts off when the car is running.