wslr
Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 39
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Right then, class. Listen up. 
Quote:The temperature of the cooling system is
monitored by the ECM via the Engine
Coolant temperature (ECT) sensor located in the
cylinder head. The ECM uses signals from this sensor
to control the cooling fan operation and adjust fuelling
according to engine temperature.
To control the cooling fan, the ECM sends a Pulse
Width Modulated (PWM) signal to the cooling fan
module (integral to the ECM). The frequency of the
PWM signal is used by the cooling fan module to
determine the output voltage supplied to the fan motor.
The ECM varies the duty cycle of the PWM signal
between 0 and 100% to vary the fan speed. If the PWM
signal is outside the 0 to 100% range, the cooling fan
module interprets the signal as an open or short circuit
and runs the fans at maximum speed to ensure the engine
and gearbox do not overheat.
The ECM operates the fan in response to inputs from
the ECT sensor, the transmission oil temperature sensor,
the A/C switch and the A/C pressure sensor.
The speed of the cooling fan is also influenced by
vehicle road speed. The ECM adjusts the speed of the
cooling fans, to compensate for the ram effect of vehicle
speed, using the Controller Area Network (CAN) road
speed signal received from the Anti-lock Braking
System (ABS) module.
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 10th Jul 2010 8:23 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
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 Old hat from GTR 
 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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| 10th Jul 2010 8:27 pm |
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wslr
Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 39
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DG wrote: Old hat from GTR
Not trying to be cocky DG. Yes, it's on the TOPIx/GTR, but it is in the Training Manual sections which I have to 'edumacate' myself with. Unfortunately, it's giving me a headache. 
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| 10th Jul 2010 8:32 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
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...and good on you ...I've used GTR for years trying to make folks think I'm educated 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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| 10th Jul 2010 8:36 pm |
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crews control
Member Since: 18 Mar 2007
Location: Dorset
Posts: 5011
  
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I don't care about all this technical crap... just want to know how to make the nice morning roar last a little longer?
8) 2005 D3 HSE
2011 D4 Landmark
2016 D4 HSE Lux
2017 Ford Tourneo VR46
Club Waitomo
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| 10th Jul 2010 11:35 pm |
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disco rob
Member Since: 04 Jul 2010
Location: Sussex
Posts: 62
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A noise thats actually supposed to be there !!!! how chuffed am i 
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| 7th Sep 2010 7:27 pm |
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Lundoz
Member Since: 06 Feb 2011
Location: Oslo
Posts: 75
  
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So how can it be turned off??
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| 29th Aug 2011 9:27 pm |
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PeanutBob
Member Since: 24 Oct 2006
Location: Cheshire
Posts: 669
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Well when I had a D3 this used to roar a bit when driving off from cold....but now I have a RRS TDV8 this sounds like a MOD Alvis 12 litre truck at start off. But, if you leave it a tickover for 1-2 mins it will disappear at current temperatures, but below 6 deg c the engine preheater will kick in and the roar may not occur! But with a V8 diesel the noise is ....splendido!
My posts here are few and far between.....as I've gone from the D3 club, then to the Defender lads, and now onto to RRS boys....crikey they spend some money on detailing. RRS posts are quite different
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| 28th Sep 2011 10:04 pm |
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devonchilliman
Member Since: 03 Nov 2008
Location: Devon
Posts: 5224
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They have Butlers Www.devonchilliman.co.uk
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| 29th Sep 2011 8:36 am |
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daz216
Member Since: 24 Jun 2011
Location: walsall
Posts: 70
 
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SOUNDS THE DOGS B XXXXX S WOULD LOVE IT ALL THE WHILE 
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| 26th Dec 2011 11:36 pm |
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discophil36
Member Since: 17 Jul 2014
Location: Renfrewshire
Posts: 142
 
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I love the roar, so do my daughters. They think it sounds like a coach
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| 15th Nov 2015 10:29 am |
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DSL
Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73131
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One post each, no favouritism. 
Mine lost the roar ages ago but new viscous fan restored it.
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| 15th Nov 2015 11:25 am |
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discophil36
Member Since: 17 Jul 2014
Location: Renfrewshire
Posts: 142
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Ha sorry there was an issue where it won't post all my post only first line so I reposted thinking I could sort it. Guess not
But what I wanted to ask was has no one considered the electric fan route and remove the viscous fan. It's a popular mod with the D1 and defender boys. Saves fuel helps engine be a bit livelier and more reliable. But perhaps not an issue on the tdv6.
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| 15th Nov 2015 11:28 am |
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