crank no start issue someone has cut the converters off?

2011 NISSAN FRONTIER

225,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC

DAVID_LEE

MEMBER
6 POSTS
FOLLOW

I bought this truck with a crank no start issue someone has cut the converters off of it so I was going to make sure I could get it running before pouring all this money into it. okay, so, I first put a code reader on it, it was showing camshaft sensor bank 2. I changed the sensor and erased the code but still crank no start. i ran the code reader again no camshaft code but now it’s showing a U1001 no communication with the TCM. So, I borrowed a buddies code reader. It’s showing the same cam sensor that I changed and the TCM code and two converter codes. When you crank it the RPM gauge moves you can unplug the crank sensor it doesn’t move any more. So, I know it’s at least communicating with me myself I’m thinking it’s the ECM. what do you think?

Dec 16, 2024 at 8:49 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

Yep, I think the ECM might be bad, but with the systems on I would check the fuses for power. This guide can help (ignition on):

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If all fuses are okay I would try replacing the ECM, you can get a preprogrammed unit by searching Google or Ebay. I can tell you I have seen the IPDM go out on these trucks and cause this issue as well, you will see many fuses without power letting you know this is the problem. Check out the images (below). Please let us know what happens.

Image (Click to enlarge)

Dec 17, 2024 at 12:13 PM

DAVID_LEE

MEMBER
6 POSTS

Where would I start or what would I check and what would I check for exactly to confirm it’s the ECU? do you have a wiring diagram with the 5v references?

Dec 21, 2024 at 1:43 PM

DAVID_LEE

MEMBER
6 POSTS

I have already checked all of the fuses and relays.

Dec 21, 2024 at 1:44 PM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

How does the engine sounds when cranking does it seem normal? this video can help:

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

I would see if the engine will run on starting fluid. If you upload a short video of the engine cranking over so I can see if the engine is hurt or not. Here is the wiring diagrams for the ECU so you can do some testing. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Dec 23, 2024 at 12:20 PM

DAVID_LEE

MEMBER
6 POSTS

It will not hit at all even with starting fluid i pulled one of the coils it’s not putting out any spark but the connector going to the coil has three wires one wire has 12v but the other two wire are grounds is that the way it’s supposed to be? And the truck is cranking normal it hasn’t jumped time or anything I have some experience with mechanical work, but I’m completely lost when it comes to electrical work.

Dec 27, 2024 at 7:38 AM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

No problem, only the black wire should be ground but you must check it while the connector is off of the coil. With the key on the green wire should be power 12 volts, the other two wires are signal/trigger wires.

Dec 27, 2024 at 10:51 AM

DAVID_LEE

MEMBER
6 POSTS

Can you walk me through step-by-step to help me troubleshoot this thing because i have no idea what I’m doing or where to start what to check or what to check for when it comes to any kind of electrical work, and I really appreciate you helping me.

Dec 28, 2024 at 3:50 PM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

Lets check the TCM fuses which are in the images below. Please check the fuses for power with the ignition on, this guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.

Image (Click to enlarge)

Dec 29, 2024 at 12:49 PM

DAVID_LEE

MEMBER
6 POSTS

All of those fuses are good.

Dec 30, 2024 at 5:23 AM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

There is a change the TCM grounds are no good, but this is rare. I would replace the TCM with a rebuilt unit. You can get a preprogrammed unit by searching Google or Ebay. Here is the location of the TCM and how to replace it. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Dec 30, 2024 at 9:30 AM