Jul 27, 2026 · 33 min · 9 segments
This week on the show I share 2 case studies from our mobile diagnostics. Both ended up with network related issues due to pin fitment. 2018 Jeep Grand Cherokee with the entire CAN C bus down and a…
So, um, we'll do a couple case studies here today, um, both, uh, relating to the same type of failure, and one that I think is really important to talk about with people who are doing diagnostics on cars or want to grow their diagnostic skills working on cars.
Because this is something that is almost universal in the world of 12-volt electrical, I'm sure outside of 12 volt too, but that's mostly what we deal with, and you could run into this scenario on just about any car.
And funny enough, it was one of the very first podcast episodes I had was on this same subject.
I talked about pin fitment, and it was like a suspension control module on a Suburban.
They had replaced e-every single component, and it was still setting the circuit code, and it was just the pin fitment.
So not to spoil what's going on, but both of these cars were challenging, and one of them, I called the wrong module because of a pin fitment issue, and I'll explain how I got there.
But it, it's such a simple fix, and once you realize that that's what's causing your problem, it's like, "Oh, okay, we just need to tighten up this pin or replace this pin." Um, but it can cause some very strange issues, and if you're not aware to check for it or you don't know how to check for it properly, um, or just don't realize that's what's going on, you can have some weird things and a lot of parts get replaced and nothing gets fixed.
So, um, we'll do a couple case studies here today, um, both, uh, relating to the same type of failure, and one that I think is really important to talk about with people who are doing diagnostics on cars or want to grow their diagnostic skills working on cars.
Because this is something that is almost universal in the world of 12-volt electrical, I'm sure outside of 12 volt too, but that's mostly what we deal with, and you could run into this scenario on just about any car.
And funny enough, it was one of the very first podcast episodes I had was on this same subject.
I talked about pin fitment, and it was like a suspension control module on a Suburban.
They had replaced e-every single component, and it was still setting the circuit code, and it was just the pin fitment.
So not to spoil what's going on, but both of these cars were challenging, and one of them, I called the wrong module because of a pin fitment issue, and I'll explain how I got there.
But it, it's such a simple fix, and once you realize that that's what's causing your problem, it's like, "Oh, okay, we just need to tighten up this pin or replace this pin." Um, but it can cause some very strange issues, and if you're not aware to check for it or you don't know how to check for it properly, um, or just don't realize that's what's going on, you can have some weird things and a lot of parts get replaced and nothing gets fixed.
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