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4 pin Audi diagnostic connector layout
4 pin Audi diagnostic connector
used in all 1989-1994 and some 1994-1997 vehicles


 

Pin
Number
Pin
Name
Description (may be empty)
1    +12V power
2    Ground
3    diagnostic K-Line
4    diagnostic L-Line
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Volkswagen old 2+2 diagnostic connector visual pinout:click to enlarge
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