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Pinout

The sixteen pins of the WiCAN PRO plug and what each one carries: power, three CAN buses, the single-wire CAN, the J1850 pair and the K and L lines.

WiCAN PRO plugs into the car's OBD-II socket (SAE J1962) and uses fourteen of the sixteen pins.

The sixteen pins of the WiCAN PRO plug with their signals: V+ on 16, ground on 4 and 5, HS CAN on 6 and 14, MS CAN on 3 and 11, CH CAN on 12 and 13, SW CAN on 1, J1850 on 2 and 10, ISO-K on 7 and ISO-L on 15

The plug of WiCAN PRO seen from the front, pins toward you: pin 1 is at the top right. The socket in the car is the mirror image.
Pin Marking Signal
16 V+ Battery, 7 V to 18 V. The only power source of WiCAN PRO, see Power.
4, 5 GND Ground.
6, 14 HS CANH, HS CANL High-speed CAN: ISO 15765-4 on most cars, SAE J1939 on trucks, raw CAN (ISO 11898).
3, 11 MS CANH, MS CANL Medium-speed CAN (MS-CAN).
12, 13 CH CANH, CH CANL The third CAN bus, GM's second high-speed bus.
1 SW CAN Single-wire CAN (GMLAN).
2, 10 J1850+, J1850- SAE J1850 PWM and VPW.
7, 15 ISO-K, ISO-L K line and L line: ISO 9141-2 and ISO 14230-4 (KWP2000).
8, 9 - Not used.

The electrical and radio figures, the comparison with WiCAN and the PDF itself are on the Datasheet page.