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ELEC TECH

Discussion in 'Technical forum' started by Hutch106, 14 February 2017.

  1. Hutch106

    Hutch106 Wrench Pro

    Messages:
    23
    From:
    South West
    Car:
    106T
    Once home i need to test the resistance readings for my fuel sender unit, this is required to work out the pull up resistor required to use my Dash2 unit for fuel level etc.
    Three pins on the unit, i'm guessing
    GROUND
    INPUT VOLTAGE
    OUTPUT VOLTAGE
    ???????
    Or is one of them a low level switch circuit?
    I'm just wondering which pins i need to measure the resistance at
    5 ltrs
    10 ltrs
    15 ltrs
    and so on until full (45ltrs)
    Peugeot 106 OEM sender unit.
    Any help would be greatly received
    Hutch
     

    Attached Files:

  2. obi_waynne

    obi_waynne Administrator Staff Member Moderator

    Messages:
    40,848
    From:
    Deal, Kent UK
    Car:
    A3 1.4 TFSI 150 COD
    IIRC the resistance changes at each fuel level 100ohms on empty, 25-40ohms half tank, 2-5 ohms full tank.

    Not sure which pin does what though. You might need to add a resister to get the readings within the range the Dash 2 needs.

    Are you still keeping the cars fuel gauge in use? This can be quite tricky and might need a custom sender unit to cope.
     
  3. Hutch106

    Hutch106 Wrench Pro

    Messages:
    23
    From:
    South West
    Car:
    106T
    Many thanks for your reply obi.
    The original gauge has been removed, they just require the Ohm readings at 5ltr intervals. then they will figure out the pull up resistor required.
    I just need to work out which pins are the right ones to measure the sender readings.
     
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