At first, I thought it's a matter of different usage thing. Then I asked someone for help. They tell me that these two kinds of cables are different in the interface. The Parallel port and Serial port have two different interfaces. The one with jacks is called female interface and the other one with pins is male interface. Oops, what a big mistake I have made!
Fortunately, now more diagnostic connectors have a USB interface, which will save my time searching for the internal usage of those queer names. I quite like those USB interface. I can operate them at ease and they are quite compatible with my PC.
I got some auto repair tools, but the cables are easily worn out. I'm quite glad they can be replaced. Diagnostic cables sold in some online wholesale stores are quite favorable. I saw them properly categorized according to their interfaces and those stores give us specific information about the car models that they are compatible for and we can get a brief idea about their usages via the product names.
The price of diagnostic cables seems to be really cheap. Just paying mo more than 10 dollars, we can own one. But some more professional ones may cost more. Choosing free shipping ones may save you some money.
Modern auto repair depends more on onboard diagnosis
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