TDC sensor

Discussion in 'General Motoring' started by Mr.Nice., Jul 8, 2003.

  1. Mr.Nice.

    Mr.Nice. Guest

    I've been looking at the wireing diagrams for my 1990 D 405.
    I'm trying to find out why the rev counter does not work, I recently
    found it to be electrical.

    There appear to be 2 wires (according to the diagram) that go from the
    instrument cluster to something called a TDC sensor (top dead center?)

    The 2 wired connect to points on the instrument cluster labelled
    "tachometer".

    Q1, is one for the road speed and one for engine rpm?

    Q2, where, physically, will I find this TDC sensor?

    Q3, am I on the right track with this?

    --
    Regards.
    Mark.(AKA, Mr.Nice.)
    ___________________________________________________________
    "To know the character of a man, give him anonymity" - Mr.Nice.
    http://www.mr-nice.rulestheweb.com mr.niceATsofthome.net
    http://community.webshots.com/user/mrnice106
    ___________________________________________________________
     
    Mr.Nice., Jul 8, 2003
    #1
  2. Mr.Nice.

    Matt Guest

    A stab in the dark, but if it does really mean Top Dead Center sensor, then
    it surely would be on the flywheel housing?

    Cheers,
    Matt
    --
    1991 Peugeot 205 Roland Garros Cabriolet
    TU3S 1.4 Carb
    http://www.205rolandgarros.co.uk
    2003 - Happy 20th Birthday Peugeot 205
    ==
     
    Matt, Jul 8, 2003
    #2
  3. Mr.Nice.

    John Bridge Guest

    It is best accessed from underneath, it screws into the flywheel housing
    with one small bolt, this bolt needs to be loosened its a sort of plastic
    clamp that needs to be prised open with a screwdriver and the sensor can
    then be pulled out of the clamp, the sensor is looking at the engine side of
    the flywheel. There should be a cable attached to the sensor it has three
    wires in it one of which is an earth connection, this cable should go to a
    brown socket near the thermostat, a brown plug goes from this socket to the
    tach. I think this brown socket is there so that some diagnostic device can
    be plugged in and used for determining TDC for setting the pump timing.
    John
     
    John Bridge, Jul 8, 2003
    #3
  4. Mr.Nice.

    Mr.Nice. Guest

    Twas Tue, 8 Jul 2003 15:57:36 +0100 when "John Bridge"
    Thanks for that, I'll go poke around. ;o)

    --
    Regards.
    Mark.(AKA, Mr.Nice.)
    ___________________________________________________________
    "To know the character of a man, give him anonymity" - Mr.Nice.
    http://www.mr-nice.rulestheweb.com mr.niceATsofthome.net
    http://community.webshots.com/user/mrnice106
    ___________________________________________________________
     
    Mr.Nice., Jul 8, 2003
    #4
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