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I'm learning about OBDII, and I'm wondering whether it is valid on EV's too.

According to Wikipedia's PIDs article, the Service 01 PID 51 (or Fuel Type) has a value 8 that means that the fuel type of the vehicle is Electric.

However, it seems that the corresponding regulation (ISO-15031) is only about "emission relevant" information? From what I can deduce, OBD-II is a general reference for all type of vehicles and ISO-15031 is only a subset of OBD-II that regulates PIDs on emissions. Is that correct? I also read on the same Wikipedia page that there are 10 services, but it seems that only 3 of them are documented (1,2,9). I'd like to know whether there is an official document on the OBD-II standard.

My question is as follows: Is the word "emission-related" (that one can found in various services) only an historical trace from the birth of OBD-II standard? (To what extent does the standard apply to EV's?)

Cullub
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Nameless
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1 Answers1

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The obd 2 port has its roots in the old obd1 systems found in cars the years leading up to the standard being created in 1996/1997 and was only intended to alert the driver that the computer detected elevated emmisions out of the tailpipe indicating that repairs were needed somewhere. OBD 2 was forced upon manufacturers by california in 1996 to simply create a uniform standard with which to get the information given by the computer(and so they can test cars easier for mandated emmissions tests) Therefore electric vehicles which do not have any computer or sensors to control emmisions nor are subject to mandatory emmissions testing have no need for such a port to connect to. As vehicles' computers and sensors evolved over the years to be faster and record more data the obd port became the obvious place to interface and read said data but this was just intended to find and fix whatever the problem creating the elevated emmissions was. All codes and data readable on the obd port have this goal in mind and serve no purpose of diagnosing other faults present in the engine or otherwise. Once again having no purpose on an electric vehicle not containing emmissions equipment

Shittykorean4banger
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