SAE J1962 connector

pin
1   Discretionary
2   Bus + Line of SAE J1850
3   Discretionary
4   Chassis Ground
5   Signal Ground
6   CAN High of SAE J2284
7   K Line of ISO 9141-2 and ISO/DIS 14230-4
8   Discretionary
9   Discretionary
10  Bus - Line of SAE J1850
11  Discretionary
12  Discretionary
13  Discretionary
14  CAN Low of SAE J2284
15  L Line of ISO 9141-2 and ISO/DIS 14230-4
16  Unswitched Vehicle Battery Positive