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First fire up of the fbh ***Winter 2016-All related here***
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TinTapper
 


Member Since: 16 Aug 2016
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Cheers Martin, I'll start there Thumbs Up
  
Post #176171611th Jan 2017 4:58 pm
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Robbie
 


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TinTapper wrote:
Anyone know where to start with "coolant pump electrical failure short circuit " fault??


The resistance spec of the circulating pump is 10 kΩ (+/-1 kΩ).

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 Land Rover - Turning Drivers into Mechanics Since 1948

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Post #176172111th Jan 2017 5:10 pm
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TinTapper
 


Member Since: 16 Aug 2016
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Hmm, just put the multi meter on it and got nothing - no continuity, no resistance??
  
Post #176183211th Jan 2017 8:58 pm
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Robbie
 


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Well that would explain it. At least the pumps are easy to change.

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 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #176185411th Jan 2017 9:36 pm
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TinTapper
 


Member Since: 16 Aug 2016
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Robbie, any recommendations to sourcing one?
  
Post #176187511th Jan 2017 10:02 pm
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TinTapper
 


Member Since: 16 Aug 2016
Location: South Northants/Oxfordshire
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Stuck the multimeter back on circulating pump and got the required 10K ohms (might have selected wrong setting on multimeter the other night Shocked )
So I put power to pump and away it went! So is the FBH output giving me the short circuit fault? That would be the PCB I guess??
Any ideas??
 

Last edited by TinTapper on 15th Jan 2017 12:56 pm. Edited 1 time in total 
Post #176292213th Jan 2017 6:58 pm
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TinTapper
 


Member Since: 16 Aug 2016
Location: South Northants/Oxfordshire
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Another day fighting the FBH problem Big Cry
Took unit off car again, checked all internal wiring for any visual clues...
Checked circulating pump - all working.
Fitted it all back, ran WTT diagnostics - even when the circulating pump is disconnected it shows 'short to earth' on pump circuit, so is it the FBH unit itself?
Crying or Very sad
  
Post #176334514th Jan 2017 7:10 pm
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TinTapper
 


Member Since: 16 Aug 2016
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Anyone got a spare PCB for V Top?? Rolling Eyes
  
Post #176408116th Jan 2017 11:55 am
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Robbie
 


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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

If you send your old one to me I will test it and see if it is fixable.
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #176408416th Jan 2017 12:05 pm
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TinTapper
 


Member Since: 16 Aug 2016
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Top Man!, Cheers Robbie!
Can you pm me your details and I'll get it to you sometime this week....if it ever stops raining...
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Post #176416516th Jan 2017 2:20 pm
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Robbie
 


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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Ok.

I must be a sucker for punishment!

Laughing
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #176417216th Jan 2017 2:33 pm
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TinTapper
 


Member Since: 16 Aug 2016
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Posts: 50

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Bow down
  
Post #176418116th Jan 2017 2:43 pm
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Gazellio @ Prestige Cars
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I note there are several used/breaker yard units for sale around £100 on ebay...
 
We buy forum member cars - PM to get a quote. http://www.garyelliott.co.uk/prestige_cars/ 
 
Post #176419016th Jan 2017 2:53 pm
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TinTapper
 


Member Since: 16 Aug 2016
Location: South Northants/Oxfordshire
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Yes, I had a search. Several about but really wanted my PCB checked first - had a look online at PCB repairers but would really need a circuit diagram for them.
Then Rob offered his expertise, so that's a good place to start...
Think many of us have been there before - buying up parts until you fix the job only to find it's cost the same as a new one Shocked
The gamble does pay off sometimes I admit! Electronics are also a sod sometimes... Rolling Eyes
My Dad can't understand why I want to fix the under bonnet bonfire Laughing Sad
  
Post #176424216th Jan 2017 4:50 pm
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Robbie
 


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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

The postie brought me the FBH ECU this afternoon so wired it to the test setup. The circulation pump fault was the only stored fault code and clearly everything was working until this fault. The unit draws normal current and communicated normally over WBUS:

Click image to enlarge


The FBH does not lock-out with a circulation pump short circuit fault, at least on this version. With no pump connected the fault will clear and show no faults until the pump is connected and commanded to run.

Click image to enlarge


The control unit puts around 2.3v on the pump circuit when connected and in standby, which this ECU did. When the pump is commanded on it receives full system voltage but the output from this ECU just collapsed back to 2.3v after a brief voltage flicker and stored the 'short' fault:

Click image to enlarge


A healthy ECU pump voltage on a different FBH when commanded to run:

Click image to enlarge


So a confirmed dead ECU board. The PCB had no visible issues and apart from the pump run voltage all the pinpoint tests checked out fine, so I am unsure of the exact cause of the failure. I reflowed the usual suspects but it made no difference.

Sorry the news is not better but at least the fault is confirmed.

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 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #176578819th Jan 2017 5:49 pm
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