Technical Temperature sensor 1998 fiat ducato 1.9td

[Geezpot]

Hi all,
My temperature gauge stopped working whilst driving. All indicators point to a bad sensor or connection with the sensor.
Can anyone tell me what the 2 wires actually are and their function on the temperature sensor.
Also does anyone know what the sensor is that's located on the head between the glow plugs?

 

[jackwhoo]

Is it the fiat engine or the psa engine?
Post photos of part you are attempting to identify

 

[Geezpot]

Is it the fiat engine or the psa engine?
Post photos of part you are attempting to identify

I believe it to be Fiat.

 

[jackwhoo]

Hi,
yes that's the fiat diesel .
Good photos.
Fingers xed someone will pop up with an answer.
The other option is look up part on eper.

Cheers
Jack

 

[jackwhoo]

Fits Fiat Ducato Water Temperature Sensor 1930cc Diesel 16X1.5 7762302

Water Temperature Sensor 16X1.5 Fits Fiat Ducato 1930cc Diesel And Turbo Diesel (1981-2002) Can Also Fit Other Make And Models Of Vehicles.

coastalmotorhomes.co.uk

 

[ceecff]

It works with Ohm resistance and goes to engine ecu or dash straight, try to disconnect cables and check sensor Ohm cold and warm, if reading is 0 or E it's broken (usually it's 3000-4000 Ohm cold and 200-400 Ohm warm).

 

[Geezpot]

It works with Ohm resistance and goes to engine ecu or dash straight, try to disconnect cables and check sensor Ohm cold and warm, if reading is 0 or E it's broken (usually it's 3000-4000 Ohm cold and 200-400 Ohm warm).

Thanks for the advise, I will check it out.

 

[Geezpot]

Thanks for the advise, I will check it out.

The issue I am having is the 2 wires coming from this sensor are hanging loose unattached, I am unable to locate where they were plugged in.

 

[Communicator]

It works with Ohm resistance and goes to engine ecu or dash straight, try to disconnect cables and check sensor Ohm cold and warm, if reading is 0 or E it's broken (usually it's 3000-4000 Ohm cold and 200-400 Ohm warm).

A 1.9TD is not a common rail engine, and does not have an engine ECU.

May I differ, and suggest an alternative explanation for the connections. The thread is quoted in the linked advertisment as M16 x 1.5. This is an exact match to the fitting for combined temperature gauge sensor, and thermostatic switch for the dash over temperature (do not use) warning light on my 2.8jtd. Both blade terminals use a reurn via the metal body. Terminal 1 which makes a chord across the moulding is for the warning light. Terminal 2 is at right angles, and lies approximately on a diameter of the moulding. I have a measured resistance of 2227 Ohms at room temperature from terminal 2 to the metal body at room temperature, on an unused unit.
I had a problem last year with the gauge showing operating temperature on an stationary cold engine. Prepared to change sensor, but discovered that the problem was a bad connection at the sensor. Contacts cleaned, problem solved.

@Geezpot 's vehcle is an x230. I am hoping that the attached diagram, extracted from the German language workshop manual that is in the Downloads section is appropriate. I think that the icons are understandable, but for ease of use I have added an English colour code translation.

I note that the pin numberng in the diagram is opposite to what have tried to describe above. Mine is drwn from Fiat eLearn for the x244, bt I could have got it wrong.

 

[ceecff]

Terminal 2 is at right angles, and lies approximately on a diameter of the moulding. I have a measured resistance of 2227 Ohms at room temperature from terminal 2 to the metal body at room temperature, on an unused unit.
I had a problem last year with the gauge showing operating temperature on an stationary cold engine. Prepared to change sensor, but discovered that the problem was a bad connection at the sensor. Contacts cleaned, problem solved.

That sounds plausible if similar sensor, good info.
About ecu really there are 1.9 TD in Fiat with engine ecu, this engine seems not, but other 1.9 TD PSA in Fiat and 1.9 TD 75/100 and 2.4 TD have engine ecu.

 

[Communicator]

That sounds plausible if similar sensor, good info.
About ecu really there are 1.9 TD in Fiat with engine ecu, this engine seems not, but other 1.9 TD PSA in Fiat and 1.9 TD 75/100 and 2.4 TD have engine ecu.

My information is based on an entry in Wilipedia, which suggests that any PSA engines were only fitted to Citroen, and Peugeot vehicles prior to 2000.. Please confirm that the Wikipedia is incorrect, and that PSA engines were fitted to Fiat badged vehicles before 2000. This is how we learn, by sharing information.

 

[Geezpot]

A 1.9TD is not a common rail engine, and does not have an engine ECU.

May I differ, and suggest an alternative explanation for the connections. The thread is quoted in the linked advertisment as M16 x 1.5. This is an exact match to the fitting for combined temperature gauge sensor, and thermostatic switch for the dash over temperature (do not use) warning light on my 2.8jtd. Both blade terminals use a reurn via the metal body. Terminal 1 which makes a chord across the moulding is for the warning light. Terminal 2 is at right angles, and lies approximately on a diameter of the moulding. I have a measured resistance of 2227 Ohms at room temperature from terminal 2 to the metal body at room temperature, on an unused unit.
I had a problem last year with the gauge showing operating temperature on an stationary cold engine. Prepared to change sensor, but discovered that the problem was a bad connection at the sensor. Contacts cleaned, problem solved.

@Geezpot 's vehcle is an x230. I am hoping that the attached diagram, extracted from the German language workshop manual that is in the Downloads section is appropriate. I think that the icons are understandable, but for ease of use I have added an English colour code translation.

I note that the pin numberng in the diagram is opposite to what have tried to describe above. Mine is drwn from Fiat eLearn for the x244, bt I could have got it wrong.

This is amazing information. Thankyou for going to the trouble. I willbe back at my van over the weekend and let you know how I get on.

 

[Geezpot]

My information is based on an entry in Wilipedia, which suggests that any PSA engines were only fitted to Citroen, and Peugeot vehicles prior to 2000.. Please confirm tthat the Wikipedia is incorrect, and that PSA engines were fitted to Fiat badged vehicles before 2000. This ia how we learm, by sharing information.

Pretty sure there is no ECU. I spent forever try8ng to find it 9nly to realise there isn't one.

 

[ceecff]

My information is based on an entry in Wilipedia, which suggests that any PSA engines were only fitted to Citroen, and Peugeot vehicles prior to 2000.. Please confirm tthat the Wikipedia is incorrect, and that PSA engines were fitted to Fiat badged vehicles before 2000. This ia how we learm, by sharing information.

Any examples:
Ducato 1.9D 1905cc XUD9
Ducato/Scudo/Ulysse 1.9TD 1905cc XUD9 TE
Scudo 1.9D 1868cc DW8
Fiat Ulysse 2.1TD XUD11

 

[Communicator]

Pretty sure there is no ECU. I spent forever try8ng to find it 9nly to realise there isn't one.

Common place for ECU on Fiat Ducato is on LHS inner wing. If engine has mechanical injection pump with 4 pipes connecting to the injectors, then no ECU, except in some cases a very basic one to control EGR.

 

[Communicator]

Any examples:
Ducato 1.9D 1905cc XUD9
Ducato/Scudo/Ulysse 1.9TD 1905cc XUD9 TE
Scudo 1.9D 1868cc DW8
Fiat Ulysse 2.1TD XUD11

Thanks