EFI (Electronic Fuel Injector) fuse?

[Jdunham]

A friendly rat or mouse decided one of my fuel injector wire would make good nest material. I have repaired the wires but I’m not getting a pulse to the injector (checked with Noid plugs.). I’m assuming this is because the wires touched and there is a fuse blown somewhere. I have pulled every fuse in the box and they all work. Is there a fuse for the EFI? Where would I find it? Maybe not a fuse?

 

[peterk9]

Welcome to the Forum.
All the fuses are listed in your Owner's Manual and I don't recall ever seeing one for the injectors.

Peter

 

[J_C]

I don't know if the entire generation shares same fuse functions, including different engines. Which engine?

A wiring diagram I'm looking at for the 3.5L shows no fuse in series, that the injectors go straight to the PCM. I see a few listings for fuses 66 through 90 for PCM in the under-hood power distribution box, in the 2014 owner manual for my 3.5L NA, 2014.

 

[Jdunham]

I don't know if the entire generation shares same fuse functions, including different engines. Which engine?

A wiring diagram I'm looking at for the 3.5L shows no fuse in series, that the injectors go straight to the PCM. I see a few listings for fuses 66 through 90 for PCM in the under-hood power distribution box, in the 2014 owner manual for my 3.5L NA, 2014.

View attachment 340557

Yep, I have found this diagram for the 2012 (much the same if not identical) and I tested every fuse in that range. All good. Surely the whole PCM wouldn’t go out because of something like this??

 

[J_C]

Might just be the driver circuit for that one fuel injector (within the PCM, could be a single fried transistor on the output), if the others are firing still, considering that they're not going to put a seperate fuse for each injector anyway. I wouldn't assume that just yet though, you can look through the wiring diagrams I have, linked here:

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[ProjectSHO89]

You need to explicitly identify what engine you have a well as the cylinder that has the suspect injector.