wgfv dead....and also ISV

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  • andyg plym
    S2Forum Freak
    • Nov 2006
    • 4646
    • Country: England

    #1

    wgfv dead....and also ISV

    wired up a testlamp and no power to either. checked wiring back to fuse box and all seems fine. ive taken off the wgfv and tested it and it clickity clicks like it sould do but then no power down to it from the loom wires, according to the fuse box (number 24) isv and wgfv are together.it it a relay fooked?
    Any ideas peeps?
  • kwlw
    S2Forum Extremist
    • Sep 2004
    • 1025
    • Country: Lithuania

    #2
    Originally posted by andyg plym
    wired up a testlamp and no power to either. checked wiring back to fuse box and all seems fine. ive taken off the wgfv and tested it and it clickity clicks like it sould do but then no power down to it from the loom wires, according to the fuse box (number 24) isv and wgfv are together.it it a relay fooked?
    Any ideas peeps?
    Maybe there are some fuses for that ? I don't remember any, but check schematics.

    Sau
    200 20vt 88' 3b, human carrier
    CQ typ85 with AAN inside, see project blog at http://kwlw.blogspot.com

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    • S2central.net
      Retired OG Mod
      • Jul 2003
      • 16590
      • Country: Northern Ireland

      #3
      Is Fuse 24 OK ?

      What year is the car ?

      You might need to buzz out the loom to check that the connection from Fuse 24 does actually get to the ISV and WGFV - it goes to the EVAP doobry as well.
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

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      • andyg plym
        S2Forum Freak
        • Nov 2006
        • 4646
        • Country: England

        #4
        its an aby 93, but is an early model wiv 3b pipework,

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        • newsh
          S2Forum Obsessed
          • Aug 2003
          • 16226
          • Country: United Kingdom

          #5
          You wont get any voltage on the WGFV till the engine is running and the throttle is wide open. Unless you're doing an output test

          S2 Coupe 3B Project


          Ur quattro restoration

          S2 Avant

          Boost is the new rock and roll!
          sigpic

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          • newsh
            S2Forum Obsessed
            • Aug 2003
            • 16226
            • Country: United Kingdom

            #6
            Maybe the connector on the bulkhead or a bad ground?

            S2 Coupe 3B Project


            Ur quattro restoration

            S2 Avant

            Boost is the new rock and roll!
            sigpic

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            • andyg plym
              S2Forum Freak
              • Nov 2006
              • 4646
              • Country: England

              #7
              Originally posted by newsh
              You wont get any voltage on the WGFV till the engine is running and the throttle is wide open. Unless you're doing an output test
              it used to clickety click before, but now dead as a doe doe

              Comment

              • andyg plym
                S2Forum Freak
                • Nov 2006
                • 4646
                • Country: England

                #8
                Originally posted by newsh
                Maybe the connector on the bulkhead or a bad ground?
                wot connector? couldnt see one earlier?

                Comment

                • sal_s2
                  S2Forum Extremist
                  • Jul 2003
                  • 1287
                  • Country: United Kingdom

                  #9
                  There should be an ignition live to the wgfv. The fuse that controls it is one of the extra fuse holders along the side of the fusebox. It should be a 10a fuse.

                  Comment

                  • s2_bo
                    S2Forum Zealot
                    • Oct 2005
                    • 6067
                    • Home: United Kingdom Current: France

                    #10
                    Andy check the two connector blocks on the bulkhead like John suggested.

                    They can burn out sometimes and that can course all sorts of sensors to stop working.

                    They are 12pin (correct me if im wrong) and sit together in vertical position with rubber boots on each end, i think on a RHD aby they are attached to the bulkhead passenger side and are a bit of a fiddle to get apart.

                    If one is burnt out or at least partly burnt out (i had this in the RS2) then you can get replacements from Audi to repair the loom.

                    Good luck.
                    91 S2 coupé - RIP
                    98 S8 - Luxury barge

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                    • andyg plym
                      S2Forum Freak
                      • Nov 2006
                      • 4646
                      • Country: England

                      #11
                      Originally posted by sal_s2
                      There should be an ignition live to the wgfv. The fuse that controls it is one of the extra fuse holders along the side of the fusebox. It should be a 10a fuse.
                      sal, wot number fuse? ta

                      Comment

                      • S2central.net
                        Retired OG Mod
                        • Jul 2003
                        • 16590
                        • Country: Northern Ireland

                        #12
                        Fuse 24 - TWENTY FOUR - its been mentioned here already... By yourself at first - are you sure where 24 is ?
                        Paul Nugent
                        Webmaster http://S2central.net
                        Administrator http://S2forum.com

                        1994 S2 Coupe ABY - aka Project Lazarus
                        2001 A6 allroad 2.5TDi - family tank
                        2003 S4 Avant 4.2 V8 - daily burble

                        Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                        There are only 10 kinds of people that understand binary - those that do, and those that don't

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                        • andyg plym
                          S2Forum Freak
                          • Nov 2006
                          • 4646
                          • Country: England

                          #13
                          yes,in fact ive checked all of em!

                          Comment

                          • S2central.net
                            Retired OG Mod
                            • Jul 2003
                            • 16590
                            • Country: Northern Ireland

                            #14
                            WIth reference to this ---



                            You should see +12V at the blue/red wire onto the WGFV, ISV and EVAP (and the afterrun pump controller)... Look at track 58 on sheet 5.

                            The source of track 58 is of course the fused side of FUse 24 - see sheet 2 and track 15. A faulty housing for Fuse 24 or the loom wiring which extends it onto the components will explain bad behavior even if the fuse is healthy.
                            Paul Nugent
                            Webmaster http://S2central.net
                            Administrator http://S2forum.com

                            1994 S2 Coupe ABY - aka Project Lazarus
                            2001 A6 allroad 2.5TDi - family tank
                            2003 S4 Avant 4.2 V8 - daily burble

                            Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                            There are only 10 kinds of people that understand binary - those that do, and those that don't

                            Comment

                            • andyg plym
                              S2Forum Freak
                              • Nov 2006
                              • 4646
                              • Country: England

                              #15
                              ta paul, did see pic before on s2 cental. i did try at weekend to lift fuse box out as was tryin to remove leaves around it etc.
                              i wonder if its quite tite under and ive pulled summat. fuse 24 is fine, also maybe coincidence but instrument clocks now not workin.

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