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DB9 - OBD2 cord can be used to connect to diagnostic connector OBD2 car.
Cord DB9 connector has the following Pinout:
1,2 - the mass
3 - CAN High
4 - ISO 9141-2 K Line
5 - CAN Low
6 - J2850 BUS-
7 - J2850 BUS+
8 - ISO 9141-2 L Line
9 - Uninterruptible power