Also from this photo just trying to understand this illustration, is that a positive charge cable that goes from the alternator through the starter all the way up to the battery?
Since we’re both having issues with the car actually starting and weird voltage issues this cable links both of the 2, wouldn’t that be the issue??
Maybe I stared at this image for too long last night so don’t rip on me if that sounds irrational.
I want to say it's only ground that is shared between the two, but I'd have to go look at the engine in real life as those diagrams can start turning into Picasso paintings in my mind.
There's also a fuse for only the ignition coils that I have yet to be able to check, in engine compartment fuse box #6 should be 15a fuse. Might as well check everything at this point. It would make sense in my mind that a damaged fuse could increase the demands of that circuit.
My vehicle is still stuck in a non-starting state roughly 5hrs away so I will only be able to work on it/diagnose every few days as it's a pain to get to. Will try my best to get as much data to share as possible though
Edit: For fun, here are the components that are able to throw the ignition coil fault codes I got:
Primary Circuit (Low Voltage side)
- ECM (Output signal to ignite + return signal from coil confirming ignition)
- ECM wiring (to/from coils, to/from CPS, Cam sensors)
- CPS/CPS wiring (We both replaced this so doubtful unless it's a wiring issue)
- Camshaft sensors/wiring (Rare that they would only cause this code, but possible)
- Coil Circuit 12v Bank 1 & 2 (I believe each bank has it's own, so less likely to cause failure of all 8)
- Main 12v supply to both banks (potential suspect, no idea where this is yet)
- Coil Circuit grounds Bank 1 & 2 (Separate grounds, less likely cause)
- Engine ground (more likely, but you'd think this would cause many other issues)
The
secondary circuit is extremely unlikely as this is just the wiring from the coil to the plugs. I tried my best to make sure this list includes all possible items, please don't hesitate to call me out on any mistakes as I've had to read across multiple sources so the validity is as always questionable.