Ok thanks, two sides have power when the fuse is in and the battery is connected but nothing changes when I turn it to on, I have tried different relays but none seem to have a different effect. Can I safely try jumping the relay or is there any wires I can check that would be coming from the ignition that would be preventing it from activating?

 

Yeah you can jumper the relay, won't hurt anything.

 

Awesome, thank you. By jumping it I was able to get power to the ecm, however I tried every relay I have and none of them would deliver power to the ecm. I will try to get a new one on the off chance none of them work for that, but is there anything else that would prevent the ecm relay from activating?

 

The real question is, does it start now that you jumpered it?

 

Yes it does, it took a bit to start up but it seemed to run fine after it was going

 

Hurray! At least now you know you are down to the relay and that should be it!

 

Thanks I hope so, I find it odd that none of my other relays would work for it but hopefully a new one will do the trick

 

So I was able to get a new relay, however it still won't start, it still doesn't have connection to the ecm. So for what ever reason the ecm relay isn't being activated, I tried checking the other line coming out of the relay but I can't tell if its supposed to have power or not, any ideas where I can go from here?

 

First, unplug the relay, probe the pins in the IPDM to make sure you have 12v power on the load side of the contact and the high side of the coil. Basically two of the pins should have power the other two should not.

If they both have power then disconnect the battery, unplug the IPDM and the ECM and ring out that wire (white wire from IPDM pin 46 to ECM pin 111) to verify it's not broken or shorted out.

 

Ok thanks, I checked they both have 12v power so I moved onto the next step. I checked the wire and at first I wasn't able to get anything out of it when I was connected for the front of the harness on the IPDM, but I jabbed a probe into the backside and it was able to make a connection. So it appears the harness that goes into the IPDM, or at least that pin has failed or is very corroded. I do have a spare harness that came with the IPDM I bought, but I would rather not have to splice all those wires together, any ideas on how I can clean that plug up? I will try to get some heavy duty contact and maybe try some cutting tip cleaners if they can fit in there. Thanks.

 

You can depin just that pin and replace it. Fortunately Nissan uses all standard sizes.

Just look up "how to depin Nissan harnesses" and you should get the idea, you can use a micrometer to measure the pin size or just buy a variety pack.

 

I tried to depin, but it did not work out, so I just ended up splicing the wires to the other plug that I had and that seems to have done the trick, hopefully the wires stay together though haha. Thank you so much for all the help, I learned a lot trying to figure this out and I do not think I could have done it without all the help. Thanks again.

 

Solder it so it stays together, don't use tape.

 

If you don't feel comfortable soldering you can use a heat gun and buy some "solder shrink" splices. They work pretty good, I frequently get lazy and just use them instead of busting out the soldering iron. Definitely better than just tape though.

 

That's true, I forget that some people have never even soldered. I guess because I've done it since I was kid, I presume everyone did as well

My friends make me solder all their stuff all the time because of this: injection wiring, stereo wiring, harnesses, etc. So I always have one in the car , which I now also realize is not the norm.