Engine Fan Problem

Engine Fan Problem was created by Simondi

Posted 10 years 3 months ago #147703
Whenever I start up the engine bay fan comes on :-?
I've checked coolant and its all there, likewise the temp gauge is rock solid - no over heating.

Interestingly though I have noticed a clicking coming from the fuse box area under the steering wheel. I am a technical numpty but could it be a relay or something?

Any help appreciated chaps
by Simondi

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Replied by bryan young on topic Engine Fan Problem

Posted 10 years 3 months ago #147705
Look just above the coolant bottle the AAT sensor is fitted to a bracket fixed to the panel above, pull the connector off the sensor, clean the contacts on the sensor spray WD40 into plug and refit. start engine and see if fan is still running, if not, disconnect plug and it should come on. If this dosent work, then it is most likely a faulty sensor as they work on an ''open'' circuit.
by bryan young
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Replied by David Aiketgate on topic Engine Fan Problem

Posted 10 years 3 months ago #147717
The engine bay fan relay is the middle one on the right of the fuseboard under the steering wheel, so you are probably hearing this working.
As above try disconnecting the sensor above the expansion tank. Spray contact cleaner on the plug and socket rather than WD40. WD40 leaves a sticky residue, which attracts crap.

David
:shrug:

Last Edit:10 years 3 months ago by David Aiketgate
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Last edit: 10 years 3 months ago by David Aiketgate.
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Replied by Simondi on topic Engine Fan Problem

Posted 10 years 3 months ago #147733
Thanks for the responses guys, much appreciated
by Simondi

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Replied by Badger on topic Engine Fan Problem

Posted 10 years 3 months ago #147754
Hi Simondi,

Do you have an F or a TF? looking at your avatar it's a TF.

We need to know what car you have and the year as the fuse layout, relay positions and wiring are totally different between the F & TF, and on the later TF's there is no engine bay temp sensor.

Let us know and we will be able to post the correct info and hopefully resolve your issue.

Brian.
by Badger

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Replied by Simondi on topic Engine Fan Problem

Posted 10 years 3 months ago #147756
Thanks,

Its a 1.6 TF registered in 03.

Is the sensor a straight pull off is it clipped in place?
by Simondi

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Replied by Badger on topic Engine Fan Problem

Posted 10 years 3 months ago #147757
Hi Simondi,

Attached is the correct fuse and relay layout, wiring diagram for the cooling fans and an image of the the position of the engine bay temp sensor.

Press in the wire clip on the sensor plug to release it.

Brian.

File Attachment:

File Name: MGTFFusesa...lays.pdf
File Size:411 KB


File Attachment:

File Name: schematicc...fans.pdf
File Size:231 KB


File Attachment:

File Name: enginbayte...nsor.pdf
File Size:911 KB
by Badger
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Replied by Simondi on topic Engine Fan Problem

Posted 10 years 3 months ago #147765
Of course I dropped the bloody clip :doh:
Anyway I've cleaned up the contacts and the fan still comes on whether I have the plug in or out so I guess it must be a faulty sensor. ( that being said I will get another clip as it must help to maintain the contact)
by Simondi

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Replied by cairnsys on topic Engine Fan Problem

Posted 10 years 3 months ago #147779
If it's any consolation I dropped the clip from my TPS and then found it on the drive about 2 months later!

What made it worse was that I was reminded that you don't need to remove the clip to disconnect the plug. You simply press the clip inwards from the side and the plug pulls off.

Good luck finding yours or a replacement.

Robin ;)

by cairnsys

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Replied by Simondi on topic Engine Fan Problem

Posted 10 years 3 months ago #147793
Good to know its not just me.

I'm away this week but off for the following two so lots of time to drop into my favourite scrappy
by Simondi

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Replied by David Aiketgate on topic Engine Fan Problem

Posted 10 years 3 months ago #147796
Yep, just press the spring clip in to release :yesnod: , don't remove :nonod: (This I found out after I lost several!) :bang:

David
:shrug:

by David Aiketgate

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Replied by Simondi on topic Engine Fan Problem

Posted 10 years 3 months ago #147878

David Aiketgate wrote: Yep, just press the spring clip in to release :yesnod: , don't remove :nonod: (This I found out after I lost several!) :bang:


So glad its not just me who does these sort of things :hugs:
by Simondi

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