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wslr
Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 38
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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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 Sat Jul 10 2010 9:23pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 26998
  
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 Old hat from GTR 
 Existential Phenomenologist.
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| Sat Jul 10 2010 9:27pm |
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wslr
Member Since: 21 Feb 2010
Location: Somerset/Devon
Posts: 38
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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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| Sat Jul 10 2010 9:32pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 26998
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...and good on you ...I've used GTR for years trying to make folks think I'm educated Existential Phenomenologist.
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| Sat Jul 10 2010 9:36pm |
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crews control
Member Since: 18 Mar 2007
Location: Hampshire
Posts: 1975
 
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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?
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| Sun Jul 11 2010 12:35am |
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disco rob
Member Since: 04 Jul 2010
Location: Sussex
Posts: 61
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A noise thats actually supposed to be there !!!! how chuffed am i 
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| Tue Sep 07 2010 8:27pm |
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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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| Mon Aug 29 2011 10:27pm |
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PeanutBob
Member Since: 24 Oct 2006
Location: WIRRAL
Posts: 531
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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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| Wed Sep 28 2011 11:04pm |
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devonchilliman
Member Since: 03 Nov 2008
Location: Devon
Posts: 2225
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They have Butlers Club Landmark(original batch
Club GNVP Sliders
Club Full Height Cargo Barrier
Club RLD Spare Wheel Protector
Club MTRs on "Dark Chrome" HSE Wheels
Club Proper Big Mudflaps
Club Cubby Fridge
Club Tracker
Club"Satin Black" Sumpguard
Club HD Blackvue
Club Sliding Floor
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| Thu Sep 29 2011 9:36am |
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daz216
Member Since: 24 Jun 2011
Location: walsall
Posts: 42
 
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SOUNDS THE DOGS B XXXXX S WOULD LOVE IT ALL THE WHILE 
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| Tue Dec 27 2011 12:36am |
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