Is it possible to test the cooling fan via lexia?

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Kunigaikstis
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Is it possible to test the cooling fan via lexia?

Post by Kunigaikstis »

Hello all,

I've taken my 2006 C5 to a mechanic for diagnosis of why the cooling fan does not run. Was told the problem is the fan itself and it needs replacing. Replaced the fan with a used one but turning the ac does not start the fan.

So now I'm thinking that the fan is probably a dud and I should replace it. However before doing that I would like to run a proper test.

Does anyone know how to do a cooling fan test via lexia?
RichardW
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Re: Is it possible to test the cooling fan via lexia?

Post by RichardW »

It should be possible, go into the ECU, then actuator tests.
Richard W
PaulC5
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Re: Is it possible to test the cooling fan via lexia?

Post by PaulC5 »

Does the air con make any attempt to run by hearing the compressor clutch clicking ? If not then the air con might need regassing if it is low on refrigerant.
Kunigaikstis
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Re: Is it possible to test the cooling fan via lexia?

Post by Kunigaikstis »

The air con did blow cold-ish air in the beggining
Gibbo2286
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Re: Is it possible to test the cooling fan via lexia?

Post by Gibbo2286 »

This part's a favourite for failing on the C5, No3 in the picture.
Attachments
kuhar Heater Motor.png
Anyone who has never made a mistake has never tried anything new. (Albert Einstein)
Kees
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Re: Is it possible to test the cooling fan via lexia?

Post by Kees »

It's always difficult witch fan you mean, if you don't mentioned the one at the front of the car, or inside for the ventilation.
The one in front is easy to test with the diagbox.
Kunigaikstis
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Re: Is it possible to test the cooling fan via lexia?

Post by Kunigaikstis »

RichardW wrote: 02 Jul 2024, 13:35 It should be possible, go into the ECU, then actuator tests.
Just tried doing that. Lexia says the actuator test is not possible. Assuming that's because the fan is a dud.
Either way thanks for the help. Cheers.
Kunigaikstis
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Re: Is it possible to test the cooling fan via lexia?

Post by Kunigaikstis »

Kees wrote: 02 Jul 2024, 14:56 It's always difficult witch fan you mean, if you don't mentioned the one at the front of the car, or inside for the ventilation.
The one in front is easy to test with the diagbox.
Sorry about the confusion. The one in the front for cooling the engine.
Kees
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Re: Is it possible to test the cooling fan via lexia?

Post by Kees »

Yes, you have to go in the repair section from the BSI and look for testing the fan, if it's oke you will hear it start and increase the fan speed.
Greetings,
Kees.
wheeler
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Re: Is it possible to test the cooling fan via lexia?

Post by wheeler »

Kunigaikstis wrote: 02 Jul 2024, 15:06 Assuming that's because the fan is a dud.
I wouldn't assume that, all Lexia does is trigger the command to run the fan, if you have a blown fuse or wiring issue to the fan it will not operate even if you command it with Lexia. Really need to have a look at a wiring diagram.
You should be able to test the fan motor off the car by applying 12v & earth directly to it (mind your fingers)

If its the same as the Mk1 C5 The low & high speeds are triggered by the injection ECU so the Low & high speed tests are in the injection ECU menus but the mid speed (for the A/C) is triggered by the BSI so use the BSI menu to test the mid speed.