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[Mechanical] [Solved] Roaring Noise from Cold
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wslr
 


Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 39


Right then, class. Listen up. Rolling with laughter

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.
  
Post #67046110th Jul 2010 8:23 pm
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DG
Site Moderator 


Member Since: 12 Dec 2005
Location: The Gaff
Posts: 43194

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

Yawn Old hat from GTR Thumbs Up

Wink
  
Post #67046210th Jul 2010 8:27 pm
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wslr
 


Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 39


DG wrote:
Yawn Old hat from GTR Thumbs Up

Wink


Laughing

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. Banging Head
  
Post #67046410th Jul 2010 8:32 pm
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DG
Site Moderator 


Member Since: 12 Dec 2005
Location: The Gaff
Posts: 43194

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

...and good on you Thumbs Up ...I've used GTR for years trying to make folks think I'm educated Laughing Wink
  
Post #67046610th Jul 2010 8:36 pm
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crews control
 


Member Since: 18 Mar 2007
Location: Dorset
Posts: 4936

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Waitomo GreyDiscovery 4

I don't care about all this technical crap... just want to know how to make the nice morning roar last a little longer?
Cool
 2005 D3 HSE
2011 D4 Landmark
2016 D4 HSE Lux
Club Waitomo 
 
Post #67047210th Jul 2010 11:35 pm
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disco rob
 


Member Since: 04 Jul 2010
Location: Sussex
Posts: 62

England 

A noise thats actually supposed to be there !!!! how chuffed am i Ner Ner
  
Post #6905107th Sep 2010 7:27 pm
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Lundoz
 


Member Since: 06 Feb 2011
Location: Oslo
Posts: 75

Norway 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

So how can it be turned off??
  
Post #82981729th Aug 2011 9:27 pm
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PeanutBob
 


Member Since: 24 Oct 2006
Location: Cheshire
Posts: 644

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Indus SilverDiscovery 4

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 Rolling with laughter Rolling with laughter
  
Post #84140228th Sep 2011 10:04 pm
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devonchilliman
 


Member Since: 03 Nov 2008
Location: Devon
Posts: 5217

England 

They have Butlers Thumbs Up
 Www.devonchilliman.co.uk  
Post #84148929th Sep 2011 8:36 am
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daz216
 


Member Since: 24 Jun 2011
Location: walsall
Posts: 70

2005 LR3 TDV6 HSE Auto Bonatti GreyLR3
ROAR

SOUNDS THE DOGS B XXXXX S WOULD LOVE IT ALL THE WHILE Bow down
  
Post #87570926th Dec 2011 11:36 pm
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discophil36
 


Member Since: 17 Jul 2014
Location: Renfrewshire
Posts: 115

Scotland 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

I love the roar, so do my daughters. They think it sounds like a coach
  
Post #156143515th Nov 2015 10:29 am
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Aerialmark
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Member Since: 21 Jun 2015
Location: Burnley (Where the M65 is cobbled)
Posts: 3340

England 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Have you 3 daughters ? Whistle
  
Post #156146915th Nov 2015 11:24 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Somewhere.
Posts: 56376

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Zermatt SilverDiscovery 4

One post each, no favouritism. Whistle

Mine lost the roar ages ago but new viscous fan restored it. Thumbs Up
  
Post #156147015th Nov 2015 11:25 am
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Aerialmark
Site Supporter 


Member Since: 21 Jun 2015
Location: Burnley (Where the M65 is cobbled)
Posts: 3340

England 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Its got to be like that with girls Thumbs Up
  
Post #156147215th Nov 2015 11:27 am
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discophil36
 


Member Since: 17 Jul 2014
Location: Renfrewshire
Posts: 115

Scotland 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

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.
  
Post #156147315th Nov 2015 11:28 am
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