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USB Connector Overview

Fig 1: Identifying USB Connector Assignments
GWWN91-10791Courtesy of VOLKSWAGEN UNITED STATES, INC.
  1. Data In (output) 
  2. Data clock 
  3. Voltage supply, terminal 31 
  4. Data Out, (here input) 
  5. Not assigned 
  6. Voltage supply, terminal 30 
  7. Audio signal LF right, positive 
  8. Control wire, positive, switched from radio 
  9. LF audio signal, negative 
  10. Left LF audio signal, positive 
  11. Not assigned 
  12. Not assigned