B3 1.8t swap tacho wiring

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • calinono
    S2Forum Tinkerer
    • Feb 2024
    • 6
    • Country: Romania

    #1

    B3 1.8t swap tacho wiring

    Hey. New to the forum. I recently did a 1.8 t swap in my 90 coupe 3a. Could someone help me with the easiest way to get the RPM working. I've got the original IC a diesel with autocheck. The engine is awt with full harness. I have a c5 IC seems to almost fit the dash.
    You do not have permission to view this gallery.
    This gallery has 2 photos.
  • M2ki
    S2Forum Maniac
    • Aug 2015
    • 547
    • Country: Estonia

    #2
    Pin 37 on the AWT ecu is tacho output.

    T10 pin 7 is tacho input.

    www.s2central.com/S2_Schematics/B/B73-07.pdf
    1989 Audi 80 Quattro
    1994 Audi 80 Quattro Competition

    Comment

    • calinono
      S2Forum Tinkerer
      • Feb 2024
      • 6
      • Country: Romania

      #3
      Thanks a lot. Don't have the pin coming out of the black conector and diagram says spare cable. Didn't bother to look at the colors
      You do not have permission to view this gallery.
      This gallery has 1 photos.

      Comment

      • calinono
        S2Forum Tinkerer
        • Feb 2024
        • 6
        • Country: Romania

        #4
        You do not have permission to view this gallery.
        This gallery has 1 photos.

        Comment

        • M2ki
          S2Forum Maniac
          • Aug 2015
          • 547
          • Country: Estonia

          #5
          You are looking at the wrong connector.
          Original 10pin one, that connects dash harness with engine/body harness.
          There are 5 in a column, black, beige, blue, green etc.

          Last edited by M2ki; 4 February 2024, 19:50.
          1989 Audi 80 Quattro
          1994 Audi 80 Quattro Competition

          Comment

          • calinono
            S2Forum Tinkerer
            • Feb 2024
            • 6
            • Country: Romania

            #6
            In my photo is the Passat wiring. Thanks. hope to finish the interior this week. Don't know if the speedo will work. The original was 3 wires br br/ Rd bl/ sw and this one got 2. The engine seems to work very nice it had only 12 k. Next week if cooling is ok(stock radiator) hope to get it to a shop to deal with 2nd lambda EVAP and SAI

            Comment

            • mdz
              S2Forum Maniac
              • Jun 2012
              • 775
              • Country: Latvia

              #7
              Passat wiring might not have the wire because it gets rpm reading through can bus. Add the wire and you're good to go. It's possible to get AWT completely running with no DTCs in B3/B4.

              Comment

              Working...