Truck quit again after having ECM fixed

2008 NISSAN TITAN

200,000 MILES • V8 • 2WD

CHUCKBRO1

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My truck quit on me about a month ago and it was the ECU. I sent it off and had it fixed put it in and it ran good until now; I was trying to hook trailer lights up on the truck and the blinkers stopped working and now the truck will not start. when you try starting the truck it cranks for about two seconds and in the middle of it turning over it's like the power shuts off and it stops turning over. please help.

Jul 7, 2021 at 8:27 AM

JACOBANDNICKOLAS

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Hi,

If it starts cranking and then cuts out, it won't be a fuse. Chances are it is the intelligent power distribution module (IPDM). The starter relay is an integral part of the IPDM and is not serviceable. If you look at pic 1 below, you see the basic outline of how the starter works. Pics 2 and 3 are the wiring schematics. I highlighted the relay in pic 2.

Here is what I suggest. On the starter, there will be a smaller wire. It will be white with a red tracer. When the key is in the start position, it should have 12v. Have a helper turn the key and engage the starter while you check voltage to that wire. If the voltage stops, my first suspect is the IPDM. If power continues and the starter stops, the starter is my first suspect.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find or if you have other questions.

Take care,

Joe

Images (Click to enlarge)

Jul 7, 2021 at 10:01 PM