Tempeture gauge....Fiat Ducato !

Discussion in 'Fiat' started by mark e, Apr 15, 2009.

  1. mark e

    mark e Read Only Funster

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    My tempreture gauge is reading maximum as soon as i turn the key. As in there is a short circuit. .After a couple of minutes it dies down to normal running temp. What im affraid of is having a false reading and ingnoring it or is a genuine reading !

    Any mechanics out there ?
    As allways, Thanks in advance :thumb:
     
  2. sinbad1

    sinbad1 Deleted User

    Sounds like your temp sender unit is caput others will advise

    Regards
     
  3. shortcircuit

    shortcircuit Read Only Funster

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    Have recently experienced the same problem. Creep up to normal then off the top of the scale. Would then waver up and down.

    Had a look underneath and found 2 ? sensors in the coolant hoses and wiggled the connection which appears to have resolved the matter as I have since done 500+ miles with gauge at normal.

    Read a posting on another forum, possibly Fiat, where the problem has been resolved by unplugging behind dash and then reconnecting. Not very scientific but if it works???

    I will be interested in any solution.
     
  4. scotjimland

    scotjimland Funster Life Member

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    Check the connection on the sender, it's not uncommon for them to get corroded .. If it's a spade replace it.
     
  5. mark e

    mark e Read Only Funster

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    Thanks for the replies so far. Will try tommorow to see if the above works.

    P.S. Where abouts are the connections please ?
     
  6. m300td

    m300td Deleted User

    malc

    the temperature sender is near the thermostat housing try un connecting the wire going to the sender the temperature gauge should not move also check the cable that goes from the temperature sender has not rubbed on any metal part earthing it out this would make the temperature gauge go stright into the red
     
  7. nomad

    nomad Funster

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    Temperature gauge Fiat Ducato

    Hi, I've had this problem twice on my 2003 Ducato 2.8. The first time disconnecting at the temp sender solved the problem. on the second occasion that did not work so I bought a new sender (£26 if I remember correctly. and non returnable) and that made no difference either. Then on advice from one of the forums I disconnected the instrument cluster and reconnected it and the problem was solved.
    I hope it works for you too.
    Colin
     
  8. Geo

    Geo Trader - Funster

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    Just resurrected this post to confirm that disconnecting the speedo cluster and re connecting, does in fact cure the problem of Ducato wayward temp needles.
    This particular one went straight to "Normal" when ign was turnd on. it now starts at Cold where it should be with a cold engine.
    I can only assume its a poor connection (Resistance) associated fault, it has been suggested a build up of static may cause the fault but I think not
    Geo
     
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  9. stevegreen

    stevegreen Read Only Funster

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    Thanks for bumping this. I have the problem at the moment which led to me being escorted off the hard shoulder of a busy dual carriageway by French Police. I'll try disconnecting the instrument cluster If I can find it and see if it works.

    I blogged about the French Police incident if you fancy a laugh it's linked below.
     
  10. Geo

    Geo Trader - Funster

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    Yes I thought it interesting enough to bring up again
    Fiat had quoted the customer (a member on here) £500 for a new cluster:Eeek:
    2 min Job FOC:RollEyes: as it was in for a cambelt change :thumb:
     
  11. spinone

    spinone Read Only Funster

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    dodgy temp gauge

    I have the same problem but don't know how to remove the instrument cluster to disconnect it.
    Could anyone help me, please?
     
  12. lebesset

    lebesset Read Only Funster

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    mine has always been perfectly reliable . only thing is it always reads one quarter up the gauge at normal running temperature

    should be grateful for small mercies I suppose , at least i know where I am !
     
  13. nomad

    nomad Funster

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    Hi Spinone, Try the sender end first and if that doesn't work then there are 2 screws which secure the instrument cluster casing (maybe with allen key heads) remove these and you should just be able to get your hand in to disconnect the temp gauge connector and reconnect it again. Hopefully it will work for you.
    Colin
     
  14. Phil

    Phil Read Only Funster

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    A low reading is usually caused by a stuck open thermostat, easy enough to change if you want the engine to run at the correct temperature. Water temp at normal running should be about 90 degrees.

    Phil.
     
  15. paulmold

    paulmold Read Only Funster

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    This is apparently such a common fault that I notice it appears in a technical question in the latest (June) edition of Practical Motorhome magazine.
     
  16. Geo

    Geo Trader - Funster

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    Two Torx screws easy to find, undo and remove speedo carefully unplug the connection and re fit plug
    sorted
    Geo
     
  17. robert.s

    robert.s Read Only Funster

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    I also have had this problem with my 2006 2.8, cleaned the multi connector on the cluster did the trick. Robert
     
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  18. Slick Vic

    Slick Vic Read Only Funster

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    Had the same problem and looks like it has worked for me, will know better in the next few days.
    Thanks:thumb:
     
  19. ShiftZZ

    ShiftZZ Funster Life Member

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    Tried changing the sensors, that did not work, had the instrument panel taken out and the static whatever removed, that only worked for a short while.

    Temp gauge would start at normal then go to max, then fall back down again, then the red light would flash on and off. Recently, the gauge was at cold and would not move.

    Everything tried and failed..

    I hope it works for you....
     
  20. Sidney

    Sidney Funster

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    This is an old post but I wanted to give my experience

    This is an old thread but I wanted to give my experience.

    Vehicle: 2004 2.8 and I first encountered a problem when on route somewhere or other...

    The temp gauge shot up to max but there were no other warning lights. I stopped and had a look saw very little evidence of the engine being hot. I continued the journey. Occasionally it would start to drop and then shoot up again.

    I checked a few forums and found the usual bits and pieces. Over a period of time I...

    1. Stripped the dash and disconnected the instrument cluster
    2. After disconnecting the battery I removed static by ensuring everything that was metal was earthed to ground
    3. Cleaned and polished the connections to the sender
    4. Disconnected the battery for a whole week
    None of these worked.


    Then I took the sender unit out. Note there are two in the thermostat housing - one goes to the engine management system and one just works the temperature gauge.


    The sender unit was given a bit of a shock - provided by a tub of boiling water and the chest freezer.


    Stupidly at this point I hooked up the multimeter (you see why it was stupid later). The sender unit worked with the resistance changing when subjected to changes of temperature.


    So with sender working it went back in the van.


    It worked! Brilliant! :thumb:


    Then a couple of weeks later the problem came back.:Angry:


    Subjecting the sender to extremes of temperature must have kicked the the thermistor back into life.


    Stupid! :Blush: I should have checked the resistance on the sender before putting it through the extremes of temperature.


    New sender. £30 ish (or cheaper via Fleabay) problem never came back. :thumb:
     
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