2016 Pathfinder no spark

[mashpotatos]

2016 Pathfinder

This is my firends car that was brought to me.
What was done:

They first took the pathfinder to nissan for regular serivce. A few days later cyl 3 was not working and car was runningn rough,. They took it back to nissan and they could not fix the problem.

They then took it to an outside shop and they replaced the coils, spark plugs and still cyl 3 is not working.

They then brought it to me and tested coil connection on cyl 3 and found it had a 12v going to it, but it was not getting the low voltage current/pulse for making coil spark. Other coils, had 12v and the low voltage. Did a wire trace to check for a broken wire, but the that was okay.

So I suggested they replace the ecu with a used doner. They had nissin do the reprogram on the doner ecu, but it still had cyl 3 not working. So, I rechecked all coil/sensor/pulgs connections. Then when starting it up, cyl 3 was sill not working. Car then died and now it could not start. So now when testing the other coils, all are not getting the low voltage pulse. So I installed the old/original ecu and still not starting.

So I checked fuses and they look okay, did a diag and found a whole bunch of erros, engine, bcu, airbags and more.

So right now, it seems one of the modules is causing this problem.

Any suggestions???

[VStar650CL]

Did the ECM show up when you did the scan, or did you get a bunch of U1000/U1001 codes from other modules? Posting the actual codes would be helpful.

The coils have their own fuse, #44 in the IPDM. When you say you checked the fuses, did you check the ones in the IPDM and not just the cabin? Also, did you use a test lamp or meter, or check them visually? Visual checks are pretty much worthless.

Cylinder 3 is in the middle of the back bank underneath the plenum, so it would be very odd for anybody to open that up without recommending replacing all three plugs and coils on the bank. So I frankly wouldn't trust anything they said they did. It sounds to me like you'll probably find a blown coil fuse or ECM fuse resulting from a trashed driver FET in the #3 coil.

You can find the engine control wiring diagram on page EC-117 here...
https://www.nicoclub.com/service-manual ... 6%2FEC.pdf
.and the IPDM layout on page PG-83 here:
https://www.nicoclub.com/service-manual ... 6%2FPG.pdf

[VStar650CL]

PS - Do you have a solid red "key" lamp on the dash? If so, the system is in a security lockout. Nissan ECM's are never plug-and-play on I-key vehicles, replacing them (new or used) always requires re-registering the keyfobs.

[mashpotatos]

Thank you for your input. But right now it is in lockdown mode. I will have to unlock before continuing. Fuses was removes and checked and was fine.
Options I am looking at, replace sensors. double check the grounding, Possible cam timming gear ( I dont think it is)

coils are brand new from nissan. all cylinders, coils , plug and just cyl 3 injector the injector was replaced. But as metioned, before all failed, the was no low current coming from the coil connector on cyl 3.. But now all coils do not have low current

But attached is the scan codes.

Did the ECM show up when you did the scan, or did you get a bunch of U1000/U1001 codes from other modules? Posting the actual codes would be helpful.

The coils have their own fuse, #44 in the IPDM. When you say you checked the fuses, did you check the ones in the IPDM and not just the cabin? Also, did you use a test lamp or meter, or check them visually? Visual checks are pretty much worthless.

Cylinder 3 is in the middle of the back bank underneath the plenum, so it would be very odd for anybody to open that up without recommending replacing all three plugs and coils on the bank. So I frankly wouldn't trust anything they said they did. It sounds to me like you'll probably find a blown coil fuse or ECM fuse resulting from a trashed driver FET in the #3 coil.

You can find the engine control wiring diagram on page EC-117 here...
https://www.nicoclub.com/service-manual ... 6%2FEC.pdf
.and the IPDM layout on page PG-83 here:
https://www.nicoclub.com/service-manual ... 6%2FPG.pdf

[mashpotatos]

Right now its in lockdown mode, since I replaced the ecm with the orginal ecm. So I will have to remove that before continuing.

Thanks,

PS - Do you have a solid red "key" lamp on the dash? If so, the system is in a security lockout. Nissan ECM's are never plug-and-play on I-key vehicles, replacing them (new or used) always requires re-registering the keyfobs.

[VStar650CL]

You can try clearing the lockout, sometimes a "first trip" P1610 (which you have) will clear once the original ECM is reinstalled. However, most often the fobs need to be refreshed before any NATS codes will erase.

I notice there's no P0303 present for a #3 misfire. Are you sure you're barking up the right tree with that?

[mashpotatos]

The cyl 3 was the first problem. Now all cylinders are dead like #3

So right now I gotta work on the lockout and get the nat part going.

But I will probably go back to all dead cylinders problem after solving the lockout

reason no code for cylinders is I cleared errors to see what is active at the moment. I am sure it will come out when I clear the lockout

thanks,

You can try clearing the lockout, sometimes a "first trip" P1610 (which you have) will clear once the original ECM is reinstalled. However, most often the fobs need to be refreshed before any NATS codes will erase.

I notice there's no P0303 present for a #3 misfire. Are you sure you're barking up the right tree with that?

[mashpotatos]

Well reinstalled the reprogramed ecu nissan did. The car started up, but still cyl 3 is dead. The car ran for about 5 minuted and died, all cyl not firing again.


So looks like the probably the cause is the IPDM. We probably look for a doner IPDM and see from there.

[VStar650CL]

The IPDM isn't going to cause a dead miss on #3. You have a good scanner, IMHO it's time to do some earnest diag instead of throwing parts at it. The ECM will report low voltage if that's what it's seeing, and if it isn't, the IPDM isn't the problem. The only part the IPDM plays in running the engine is supplying power to the ECM, injectors, and coils. If those are all good then the IPDM is doing its part.

Start with the basics, have you pulled a plug or two to see if they're blackened or flooded? Nothing Nissan will start with flooded cylinders. If they're dry, have you tried spraying Brakleen or Gumout down the barrel to eliminate fuel starvation? What's the fuel trim, is it off scale high or low? In the short time it ran, was there smoke? What color, and how did it smell? Have you cleaned the MAF? Almost everything Nissan is MAF-dependent, even a piece of lint in the wrong place can make it run like garbage or stall. Does the RPM scan normally when cranking? If it's jittery or zero, your crank sensor is lying to the ECM. Same thing with the cam angles, if they're bouncing around or reading something besides zero when you crank, it probably means a lying CMP sensor.