ECU Problem/Diagnosis - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Down2Earth · 05-27-2019, 01:06 PM

I bought my '95 240sx couple years ago and my ECU was always a bit strange, it had a small fuse hanging out of it with two wires going inside, i pretty much ignored this as the car ran fine.

So after sitting and building the car I decided it was time to properly investigate and figure out whats up with my ECU before I blow my engine over some oversight

So what the car currently does is it does not want to turn off when the ignition is off; also it does not run the smoothest, so I replace the ECU with another one and it runs absolutely spectacular; that being said I would like to fix this ECU so I opened it up to find:

Now precariously it doesnt look like the trace was burnt, rather it was split on PURPOSE? Thats interesting. But the question is; did they jump that trace and bypass some function? Is it for some kill switch setup for the ignition? if I run a wire over the cut trace and return it to "factory" will the ECU function appropriately? is this a mod of some sort for some setup?

05-27-2019, 01:06 PM	#1
Down2Earth Leaky Injector Join Date: Jan 2016 Location: Toledo, Ohio Age: 28 Posts: 90 Trader Rating: (3) Feedback Score: 3 reviews	ECU Problem/Diagnosis I bought my '95 240sx couple years ago and my ECU was always a bit strange, it had a small fuse hanging out of it with two wires going inside, i pretty much ignored this as the car ran fine. So after sitting and building the car I decided it was time to properly investigate and figure out whats up with my ECU before I blow my engine over some oversight So what the car currently does is it does not want to turn off when the ignition is off; also it does not run the smoothest, so I replace the ECU with another one and it runs absolutely spectacular; that being said I would like to fix this ECU so I opened it up to find: Now precariously it doesnt look like the trace was burnt, rather it was split on PURPOSE? Thats interesting. But the question is; did they jump that trace and bypass some function? Is it for some kill switch setup for the ignition? if I run a wire over the cut trace and return it to "factory" will the ECU function appropriately? is this a mod of some sort for some setup?