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Eliot34
Member Since: 19 Jun 2020
Location: france
Posts: 16
  
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Hello everyone.
I am going to tell you about a concern that I have had for a few weeks.
I have noticed that when I put a lot of stress on the engine for a long enough period like mountain road for 1 hour or two, I have the fan that starts to turn fully, it follows the engine speed, the more I accelerate the more it works fast the less I accelerate the less it spins. When it turns full, it looks like I have a tank under the hood !!!!
Yesterday, it did it to me too but on normal road without any particular request (30 ° outside).
In addition, the red battery indicator light turns on once or twice (no more) for a few seconds and then turns off.
Engine temperature at TDB is ok and the LDR level is good.
The IIDTOOL does not identify any code that is explicit or related to the problem.
I haven't lifted the hood yet, but I would like some tips / research leads.
Mass? Alternator? Viscocoupler? other?.....
Thank you 🙂
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 22nd Aug 2021 9:30 pm |
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G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 549
 
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It is normal for the fan to work along with the engine if it hit a certain temperature - even more so if you have the a/c on. Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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| 22nd Aug 2021 9:44 pm |
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Eliot34
Member Since: 19 Jun 2020
Location: france
Posts: 16
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good evening, thanks for your response.
I agree, but the air conditioning does not work (I did not look for the cause). There remains the concern of the battery indicator which only occurs when the fan is working fully. On short trips I don't have a red battery light.
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| 22nd Aug 2021 9:48 pm |
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DN
D3 Decade
Member Since: 24 Jun 2006
Location: W.London.
Posts: 2326
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Could the intermittent red ( alternator not charging light) be caused by the auxiliary belt slipping slightly ? If the belt is old, or the tensioner weak, this could happen. D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.
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| 22nd Aug 2021 10:38 pm |
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darrind
Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863
  
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If you have an IID why not monitor the live values for power whilst driving to see what's happening? Must stop buying shiny toys....
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| 22nd Aug 2021 10:41 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8162
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Possibly the extra load of the viscous fan being locked up as it should be in such circumstances is making the fan drive belt slip momentarily, this could throw the red light on, when was the auxiliary belt last changed? Is there any liquid (water or oil) on the belt?
Why doesn’t the air con work? - this may be the problem. It can when others can't,
It will when others won't,
It goes where others don't.
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| 23rd Aug 2021 7:22 am |
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Eliot34
Member Since: 19 Jun 2020
Location: france
Posts: 16
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I just passed the IIDTOOL, here is the error code:
P0626-00: High Field Terminal Circuit Voltage
alternator
"Check the charging voltage. Check the charging system circuits. Consult the electrical guides. If the circuits do not show any fault, install a new alternator. Refer to section
of the workshop manual. Clear the
DTC and check for proper operation. "
Since the problem is intermittent, I will wait to see.
I also have a Cyrix splitter coupler, maybe the problem comes from there too.
I will disconnect it to see if the problem returns.
About the air conditioning, I have the D3 for 3 years and the air conditioning never worked, it is sure that it is not related.
I haven't been busy fixing it for the moment.
About the auxiliary belt, I don't know when it was changed, but it seems to have good tension and shows no signs of wear. There is also no liquid on it.
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| 23rd Aug 2021 6:23 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8162
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ISTR there have been incidents in the past where the alternator cable to battery has been rubbing on the chassis causing a short, use the search function under the disco4.com title for more info.  It can when others can't,
It will when others won't,
It goes where others don't.
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| 23rd Aug 2021 7:02 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10574
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At the front of the car. On the diff housing
Could be a loose connection on the thick cable too
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| 23rd Aug 2021 9:09 pm |
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