Radiator cooling fan never actually turns on - A/C only works for 5 seconds

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
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My Name: Christiaan

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Posts: 6
Joined: Wed Jan 16, 2019 1:01 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (05)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)

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Hi guys,
I have a 1.4HDi 2005
Okay so I've been looking and seems like I can not find a similar problem on here.

So, I noticed that when I switch on my A/C(manual a/c) the clutch on the compressor/condenser kicks in for 5 seconds and the releases again. So I also noticed that the cooling fan never actually turns on, and the engin heat stays at 3 lights on. I have the ont with the round grey relay on the top. Reley seems fine, as soon as I turn the ignition the relay switches on. Fuse is fine also. I tried giving the fan 12v direct from the battery but nothing happened.
Am I missing something or could the fan be broken?
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My Name: C3CAR

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Posts: 2658
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Hi Christiaan
Christiaan wrote: Wed Jan 16, 2019 1:34 pm I noticed that when I switch on my A/C(manual a/c) the clutch on the compressor/condenser kicks in for 5 seconds and the releases again. So I also noticed that the cooling fan never actually turns on
Yes, these are connected. If the cooling fan doesn't work then the A/ won't work. This is how it is supposed to be.
Christiaan wrote: Wed Jan 16, 2019 1:34 pm I tried giving the fan 12v direct from the battery but nothing happened.
The fan is faulty.
Christiaan wrote: Wed Jan 16, 2019 1:34 pm Am I missing something or could the fan be broken?
I don't think you missed anything. You did the diagnostics right by powering up the fan with 12v (be careful because if it does actually spin on test, it can take fingers off :o ).

If you are sure you got the 12v connection correct and the fan doesn't turn, then the fan is faulty.

The ones without the relay are a little bit different and have more wires that need voltage to spin the cooling fan, but if yours is a 2 wire fan, I think you have found the fault. :)


Find a new fan at Euro Car Parts.
My Name: Christiaan

Contributor
Posts: 6
Joined: Wed Jan 16, 2019 1:01 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (05)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)

Post

It's actually 5 wires, it has the black 2 pin connector and another 3 pin grey connector going to the fan motor. So I'm not 100% sure I actually got the 12v to the motor😂. I've been told there is a reaistor somewhere but I'm not sure where its located so I can't check to see if its blown or not.
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My Name: C3CAR

Guru
Posts: 2658
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 175 times
Been thanked: 93 times

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Christiaan wrote:So I'm not 100% sure I actually got the 12v to the motor

If yours looks like this:

Citroen C3 fan control wires and plug
Citroen C3 fan control wires and plug

Then this has 2 fat wires that are the 12v supply and the 3 thin wires are used to control speed setting.

You need 12v AND a voltage on a thin wire for the fan to run.

One of the thin wires goes back to the ECU to say the fan is running.
Christiaan wrote: Wed Jan 16, 2019 3:17 pm I've been told there is a reaistor somewhere but I'm not sure where its located so I can't check to see if its blown or not.
Someone was confused. This is not correct for the engine/radiator cooling fan :) There is no resistor. It is all ECU controlled on these years (2002-2006) and diesel fuel. Things change on the A51 2010 and some of the post 2006 models and you co back to bent bits of wire resistors :o

Christiaan wrote: Wed Jan 16, 2019 1:34 pm I have a 1.4HDi 2005
Okay so I've been looking and seems like I can not find a similar problem on here.
Very similar to C3 (Pluriel) 1.4 HDI 2004 Engine Cooling Fan does not work - this topic.
User avatar
My Name: C3CAR

Guru
Posts: 2658
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 175 times
Been thanked: 93 times

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The testing tool for the fan (and not only the fan,, but everting else on the C3) is lexia tool (here). Its a powerful tool that takes a bit of setting-up and there is a topic about it here


These are lexia images of the Fan diagnosis (not very exciting) :lol:

Testing the cooling fan on a Citroen C3
Testing the cooling fan on a Citroen C3
Citroen C3 cooling fan diagnostics
Citroen C3 cooling fan diagnostics
My Name: Christiaan

Contributor
Posts: 6
Joined: Wed Jan 16, 2019 1:01 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (05)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)

Post

I read somewhere on this forum to test the coolant temperature sensor you start the engin cold and unplug the sensor, the temp Guage then either goes to red or does nothing at all... And I can not remember that it doen when the sender is faulty
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My Name: C3driver52

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Posts: 1937
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
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Christiaan wrote: Thu Jan 17, 2019 9:54 am I read somewhere on this forum to test the coolant temperature sensor you start the engin cold and unplug the sensor, the temp Guage then either goes to red or does nothing at all... And I can not remember that it doen when the sender is faulty
I have never needed to do that because I can plug in lexia and read the engine temperature in real time :D

Different engines have different systems and this may not work on all of them (if any).

But it doesn't cost anything to try it (apart from logging a fault code).
My Name: Christiaan

Contributor
Posts: 6
Joined: Wed Jan 16, 2019 1:01 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (05)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 80000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 diesel (70 PS)

Post

I dont have Lexia and I cannot get it, postal service in my coutry is pathetic so I'll most likely never get it.
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