granddad Posted July 17, 2012 Share Posted July 17, 2012 hi i have fiat 2.8 05 plate the tempeture has gone funny it was running at normal tempeture then drop down to o then up to the top then back down to o then stay there i have change the sender unit took the plug of the back of the gauge it now gose up to ab 43 min on a clock then drop down to o need help please granddad Link to comment Share on other sites More sharing options...
euroserv Posted July 17, 2012 Share Posted July 17, 2012 Hello Granddad, Have you made sure that there is sufficient water in the cooling system? This engine is not prone to air locks but if there is air in there the sender will not be able to get a reading. If there is, and you have changed the sender unit it will either be a fault in the wiring from the sender to the ECU or from the ECU to the instrument cluster. I have never heard of a temperature sender problem that was anything other that a corroded plug onto the sender unit or the sender itself. Nick Link to comment Share on other sites More sharing options...
macclad Posted July 17, 2012 Share Posted July 17, 2012 hy i have same problem on fiat it started in france 2weeks ago 2000 mile trip used no water run normal turn on engine in morning gauge goes strait to hot thanks macclad. Link to comment Share on other sites More sharing options...
Dave Newell Posted July 17, 2012 Share Posted July 17, 2012 You may not be aware that there are two temperature senders on the 2.8 JTD Ducato, one supplies the ECU and the other feeds the dashboard gauge. Are you sure you replaced the apropriate sender unit? I have an ongoing issue with a customer's van that has defied all attempts to rectify the wayward temperature gauge. Net step will be to double check all earth connections and perhaps try a different instrument panel, if only to rule it in or out of the possibilities. D. Link to comment Share on other sites More sharing options...
747 Posted July 17, 2012 Share Posted July 17, 2012 There are 2 temperature senders. The left hand one (as youi open the bonnet and look in is the one that could be faulty. It is inboard of the thermostat. Before you do that, remove the cover over the instrument binnacle in the cab. Disonnect the plug for the wiring that feeds the instruments. Reconnect it. A number of people have said that this alone can solve the problem. I just changed the sender. If you still have the problem after doing this then you could have a faulty PCB (printed circuit board) in the instrument assembly. These are very expensive to replace. A good tip I heard about was to remove it and give it to a suitably experienced electrician (preferably 12 volt experienced). The fault can come about because of a 'dry joint' on the board. If he remakes them with a soldering iron, it usually cures the fault and is a much cheaper option. Link to comment Share on other sites More sharing options...
Dave Newell Posted July 18, 2012 Share Posted July 18, 2012 747 - 2012-07-17 9:39 PM There are 2 temperature senders. The left hand one (as youi open the bonnet and look in is the one that could be faulty. It is inboard of the thermostat. Before you do that, remove the cover over the instrument binnacle in the cab. Disonnect the plug for the wiring that feeds the instruments. Reconnect it. A number of people have said that this alone can solve the problem. I just changed the sender. If you still have the problem after doing this then you could have a faulty PCB (printed circuit board) in the instrument assembly. These are very expensive to replace. A good tip I heard about was to remove it and give it to a suitably experienced electrician (preferably 12 volt experienced). The fault can come about because of a 'dry joint' on the board. If he remakes them with a soldering iron, it usually cures the fault and is a much cheaper option. Simply disconnecting the instrument panel and reconnecting will do nothing. The instrument panel reset procedure is to unplug the centre black plug from the instrument panel then turn the ignition on and off before reconnecting the black centre plug. The dry joint theory is quite possible and I shall investigate this further thanks. D. Link to comment Share on other sites More sharing options...
onecal Posted July 18, 2012 Share Posted July 18, 2012 Hi ,Check all connections on the ECU and instrument panel back also from sensor. Plug and unplug a few times can help if corroded, also you can clean with Aero Kleen 50 (available from Maplins)Regards,Brendan Link to comment Share on other sites More sharing options...
747 Posted July 18, 2012 Share Posted July 18, 2012 Dave Newell - 2012-07-18 7:11 AM 747 - 2012-07-17 9:39 PM There are 2 temperature senders. The left hand one (as youi open the bonnet and look in is the one that could be faulty. It is inboard of the thermostat. Before you do that, remove the cover over the instrument binnacle in the cab. Disonnect the plug for the wiring that feeds the instruments. Reconnect it. A number of people have said that this alone can solve the problem. I just changed the sender. If you still have the problem after doing this then you could have a faulty PCB (printed circuit board) in the instrument assembly. These are very expensive to replace. A good tip I heard about was to remove it and give it to a suitably experienced electrician (preferably 12 volt experienced). The fault can come about because of a 'dry joint' on the board. If he remakes them with a soldering iron, it usually cures the fault and is a much cheaper option. Simply disconnecting the instrument panel and reconnecting will do nothing. The instrument panel reset procedure is to unplug the centre black plug from the instrument panel then turn the ignition on and off before reconnecting the black centre plug. The dry joint theory is quite possible and I shall investigate this further thanks. D. Dave, you have a PM. Link to comment Share on other sites More sharing options...
granddad Posted July 18, 2012 Author Share Posted July 18, 2012 hi just done as u said now iv got no instrument panel light or rev counter granddad Link to comment Share on other sites More sharing options...
Dave Newell Posted July 18, 2012 Share Posted July 18, 2012 747 - 2012-07-18 3:36 PM Dave Newell - 2012-07-18 7:11 AM 747 - 2012-07-17 9:39 PM There are 2 temperature senders. The left hand one (as youi open the bonnet and look in is the one that could be faulty. It is inboard of the thermostat. Before you do that, remove the cover over the instrument binnacle in the cab. Disonnect the plug for the wiring that feeds the instruments. Reconnect it. A number of people have said that this alone can solve the problem. I just changed the sender. If you still have the problem after doing this then you could have a faulty PCB (printed circuit board) in the instrument assembly. These are very expensive to replace. A good tip I heard about was to remove it and give it to a suitably experienced electrician (preferably 12 volt experienced). The fault can come about because of a 'dry joint' on the board. If he remakes them with a soldering iron, it usually cures the fault and is a much cheaper option. Simply disconnecting the instrument panel and reconnecting will do nothing. The instrument panel reset procedure is to unplug the centre black plug from the instrument panel then turn the ignition on and off before reconnecting the black centre plug. The dry joint theory is quite possible and I shall investigate this further thanks. D. Dave, you have a PM. Hi, I've read your PM and am totally confused. It is entirely about a fuel gauge issue when this thread is about a temperature gauge issue. Other than the fact they are both in the instrument panel I fail to see the significance of your PM in this case. D. Link to comment Share on other sites More sharing options...
Dave Newell Posted July 18, 2012 Share Posted July 18, 2012 As it happens I had cause to strip down a Boxer instrument panel today (same as Ducato) due to the right hand indicator telltale having a dead short, as its an LED its probably that which has failed. Anyway getting the panel itself out of the binnacle and its associated plastic housing bits is not difficult but to get at the PCB side of things you need to remove the four gauge needles, temperature, speedo, rev counter and fuel gauge which is a delicate job. I've passed it onto a local chap who specialises in this kind of work as if it goes pete tong a new panel is £580.04 plus VAT 8-) . So checking for dry joints is not a job for the feint hearted, pulling one needle off could ruin the drive unit for that gauge and then a new panel is the only solution. D. Link to comment Share on other sites More sharing options...
747 Posted July 18, 2012 Share Posted July 18, 2012 Hi Dave, You know something Dave .... you are right. 8-) I can only try to squirm out of this embarassing situation by pleading that the fault also shows up on the instrument panel. :$ There have been a number of threads on various forums (fora?) about strange behaviour on Fiat instrument clusters. A faulty fuel gauge has been brought up a few times but the info I sent you is the first time that a relay of some description has been mentioned as a possible culprit. Possibly because it is hidden behind the dashboard. Back to this current topic. Perthaps grandad can expand on why he seems to have nothing at all working now. Link to comment Share on other sites More sharing options...
granddad Posted July 18, 2012 Author Share Posted July 18, 2012 sorted instrument panel out plug was loose Link to comment Share on other sites More sharing options...
Dave Newell Posted July 18, 2012 Share Posted July 18, 2012 747 - 2012-07-18 6:53 PM Hi Dave, You know something Dave .... you are right. 8-) I can only try to squirm out of this embarassing situation by pleading that the fault also shows up on the instrument panel. :$ There have been a number of threads on various forums (fora?) about strange behaviour on Fiat instrument clusters. A faulty fuel gauge has been brought up a few times but the info I sent you is the first time that a relay of some description has been mentioned as a possible culprit. Possibly because it is hidden behind the dashboard. Back to this current topic. Perthaps grandad can expand on why he seems to have nothing at all working now. No worries mate, having re-read my last post to you it did seem a bit terse so I apologise for the tone of it, I was just confused as it didn't seem very relevant. D. Link to comment Share on other sites More sharing options...
747 Posted July 18, 2012 Share Posted July 18, 2012 granddad - 2012-07-18 8:16 PM sorted instrument panel out plug was loose No problem, just too happy to help out. It is worth it for that warm glow when someone appreciates how much you have put yourself out to help. Link to comment Share on other sites More sharing options...
granddad Posted July 18, 2012 Author Share Posted July 18, 2012 thx to all who have reply Link to comment Share on other sites More sharing options...
macclad Posted July 19, 2012 Share Posted July 19, 2012 grandad i have simlar problem can you explain which plug ws loose thanks macclad Link to comment Share on other sites More sharing options...
granddad Posted July 19, 2012 Author Share Posted July 19, 2012 hi it was the black plug on the back of instrument panel just wriggle it ab then was ok Link to comment Share on other sites More sharing options...
granddad Posted July 25, 2012 Author Share Posted July 25, 2012 hi well at last my tempeture gauge is ok after a dud 1 have put 2 new sender unit in the 1 on the left was not it it turn out to be the 1 on the right which is the fatter 1 of the 2 which is 22 m thx to all granddad Link to comment Share on other sites More sharing options...
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