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4 pin Audi diagnostic connector layout
4 pin Audi diagnostic connector
used in most 1989-1994 and some 1994-1997 year manufactured Audi cars




Description (may be empty)
1 +12V  Power
2 GND  Ground
3 K-Line  diagnostic k-line
4 L-Line  diagnostic l-line

It's true for the mono-jet Volkswagen AG (or VAG: Volkswagen, Audi, Skoda, Seat) cars, although that interface is installed not on all the cars.
It must be on all cars equipped with Mono-Motronic (of any version) ECU and on all equipped with 096 automatic transmission.
It is not present on most old cars with Mono-Jetronic.

According to 1 reports in our database (1 positive and 0 negative) the Audi 4 pin diagnostic interace pinout should be correct.

Is this pinout
Audi 4 pin diagnostic interace visual pinout:click to enlarge
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