coolant/oil/other temp sensors vas

  1. Frequent Poster Joined: Apr 2012 Bradford/Leeds Posts: 775 03 R53 Mini Cooper S with a little extra going on
    #1
    3 sensors
    i know green is coolant
    brown has something to do with aircon (not used )
    what does the blue one measure? is it coolant or oil fed
  2. Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5
    #2
    on my VTS blue is coolant temp sensor and sender for dashboard dial, green is for signalling overheat LED on dial
  3. Frequent Poster Joined: Apr 2012 Bradford/Leeds Posts: 775 03 R53 Mini Cooper S with a little extra going on
    #3
    so they both measure coolant temps?
  4. Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5
    #4
    yeh the green one is a thermocontact sensor that's earth when there's a loss of coolant in the system at around 116deg.C

    the blue is a negative temperature coefficient thermo-resistor where the resistance in the sensor decreases as the temperature goes up - hope that helps

    btw my source is taken directly from the Bosch Citroen operating manual for ME7.4.4/M7.4.4 system i believe magneti marelli are the same from what the Haynes manual says