汽车的总线引出线是否可以不同?

Does can bus pinout differ in cars?

我正在研究 CAN BUS 和 CAN 协议。我想知道,每个车型在 OBDII 端口上的引出线是否不同? 或者所有汽车都一样吗?

P.S。如果不同,是否有对应的数据库?

Wikipedia to the rescue:

OBD-II is an improvement over OBD-I in both capability and standardization. The OBD-II standard specifies the type of diagnostic connector and its pinout, the electrical signalling protocols available, and the messaging format.