OBD2 Pinout: Connector and Wiring Explained

Hello!

For a 1999 Audi A3 TDI with 110 horsepower (AFH engine), the following pins are connected on the OBD diagnostic connector: 1, 4, 5, 7, and 16.

The reading of the control units functions smoothly via connectors 4, 7, and 16.

What is the purpose of connectors 1 and 7?
I couldn't find anything about that in the forum!

Sure, here's the translation:

"Thank you in advance."

Bernhard.

At Audi, SEAT, Škoda, and Volkswagen:

Pin 1: Terminal 15a (ignition positive, fused).
Pin 2: J1850 Bus+
Pin 4: Ground.
Pin 5: Signal ground.
Pin 6: CAN-High (J-2284)
Pin 7: ISO 9141-2 K-line.
Pin 10: J1850 bus.
Pin 13: Terminal 30a (permanently energized, fused).
Pin 14: CAN-Low (J-2284)
Pin 15: L-line (or 2nd ISO 9141-2 K-line, depending on the vehicle).
Pin 16: Battery (+) voltage.

The main power cables are usually bundled together. Unfortunately, nobody bothers with separate power lines anymore.

CU Gremlin.

Hello, has the occupancy rate at VW remained the same in 2012?

Yes: http://www.obd.wiki/obd-2-buchse