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Heater not starting D4
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

Hey - no offence taken DSL. Annoyed and embarrassed at myself, no-one else.

Just been looking at details of what a good output from an alternator should be. That lines up with your assessment. I expected the voltage to drop further than that tbh.

Still confused though on how the FBH won't run on a charged (even if partially) battery, even after an overnight charge.

Will see what happens tomorrow.
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19218283rd Mar 2018 7:16 pm
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

12.59V after overnight charge. Maybe a tiny bit lower than youโ€™d expect but close. 15 miles this morning (which I know isnโ€™t enough to expect it back to full charge) and it was 12.43V after everything had switched off.

Looks like no fault in the FBH and probably not the battery after all. Expecting to have to change the alternator as suggested.

Any one know how long it takes to replace?
It looks pretty inaccessible.

Got to do 200 miles on Wed and 300 next weekend. If I canโ€™t get it changed am wondering if I can trust the alternator over that distance. I suppose as long as it is providing some charge it will be ok.
Wednesday I can take another car but next weekend I the D4.
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19221584th Mar 2018 2:10 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Somewhere.
Posts: 59802

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

Battery is still suspect in my non techie eyes, after overnight charge it should be way higher, esp with its surface charge. Dying alternator might have asked for company. Thumbs Up
 

11 D4 HSE - just Dee, no more Double Disco. Sad

Old Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡น๐Ÿ‡ณ๐Ÿ‡ช๐Ÿ‡ธ๐Ÿ‡ฆ๐Ÿ‡ฉ๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฑ๐Ÿ‡บ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡น๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ด๐Ÿ‡ซ๐Ÿ‡ฎ๐Ÿ‡ต๐Ÿ‡ฑ๐Ÿ‡ธ๐Ÿ‡ฐ๐Ÿ‡จ๐Ÿ‡ฟ๐Ÿ‡ฑ๐Ÿ‡น๐Ÿ‡ฑ๐Ÿ‡ป๐Ÿ‡ง๐Ÿ‡ผ
New Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡ธ + ๐Ÿ‡ซ๐Ÿ‡ฎ next. Not going to ๐Ÿ‡ต๐Ÿ‡ฑ ๐Ÿ™ 
 
Post #19221594th Mar 2018 2:16 pm
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

There goes my new VANOS solenoids and DISA valves for the Z4 for another month Sad

Like you said DSL - itโ€™s only money.
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19221674th Mar 2018 2:39 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Somewhere.
Posts: 59802

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

Agreed, you'd only spend it on things you'd enjoy. Laughing
 

11 D4 HSE - just Dee, no more Double Disco. Sad

Old Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡น๐Ÿ‡ณ๐Ÿ‡ช๐Ÿ‡ธ๐Ÿ‡ฆ๐Ÿ‡ฉ๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฑ๐Ÿ‡บ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡น๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ด๐Ÿ‡ซ๐Ÿ‡ฎ๐Ÿ‡ต๐Ÿ‡ฑ๐Ÿ‡ธ๐Ÿ‡ฐ๐Ÿ‡จ๐Ÿ‡ฟ๐Ÿ‡ฑ๐Ÿ‡น๐Ÿ‡ฑ๐Ÿ‡ป๐Ÿ‡ง๐Ÿ‡ผ
New Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡ธ + ๐Ÿ‡ซ๐Ÿ‡ฎ next. Not going to ๐Ÿ‡ต๐Ÿ‡ฑ ๐Ÿ™ 
 
Post #19221714th Mar 2018 2:46 pm
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Sloss
 


Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1657

Scotland 

A simple voltage does not give the full status of the batteries capacity.

You need to get an auto electrician to properly diagnose your problem. I would not just stick on an alternator based on comments on here no matter how well meaning we are ๐Ÿ‘
 Stew,

2010 D4 gone but I really loved it
Went back to Merc - C350 AMG 
 
Post #19221804th Mar 2018 3:02 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Somewhere.
Posts: 59802

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

I did make sure I bunged in the "non techie" words every now and again. Laughing Laughing
 

11 D4 HSE - just Dee, no more Double Disco. Sad

Old Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡น๐Ÿ‡ณ๐Ÿ‡ช๐Ÿ‡ธ๐Ÿ‡ฆ๐Ÿ‡ฉ๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฑ๐Ÿ‡บ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡น๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ด๐Ÿ‡ซ๐Ÿ‡ฎ๐Ÿ‡ต๐Ÿ‡ฑ๐Ÿ‡ธ๐Ÿ‡ฐ๐Ÿ‡จ๐Ÿ‡ฟ๐Ÿ‡ฑ๐Ÿ‡น๐Ÿ‡ฑ๐Ÿ‡ป๐Ÿ‡ง๐Ÿ‡ผ
New Dee ๐Ÿ‡ฌ๐Ÿ‡ง๐Ÿ‡ซ๐Ÿ‡ท๐Ÿ‡ง๐Ÿ‡ช๐Ÿ‡ณ๐Ÿ‡ฑ๐Ÿ‡ฉ๐Ÿ‡ช๐Ÿ‡ฉ๐Ÿ‡ฐ๐Ÿ‡ธ๐Ÿ‡ช๐Ÿ‡ฎ๐Ÿ‡ธ + ๐Ÿ‡ซ๐Ÿ‡ฎ next. Not going to ๐Ÿ‡ต๐Ÿ‡ฑ ๐Ÿ™ 
 
Post #19221814th Mar 2018 3:04 pm
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Sloss
 


Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1657

Scotland 

I would not just stick on an alternator based on comments on here no matter how well meaning Des is๐Ÿ‘

Sorted!
 Stew,

2010 D4 gone but I really loved it
Went back to Merc - C350 AMG 
 
Post #19221894th Mar 2018 3:28 pm
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

As I said earlier Sloss, the battery is being replaced on Tuesday anyway. If that proves to not be the problem itโ€™s likely Iโ€™ll run out of time.
I just need the car for next weekend. None of the other cars I own are suitable - all too small. If I canโ€™t trust the D4 Iโ€™ll have to hire a car anyway. Will see how it is after Tuesday.

Got a good relationship with my Indy. He wonโ€™t allow me to shell out for anything that he is sure isnโ€™t needed. I still owe him for an ac gas recharge he did a few weeks ago because he suspects a small leak.
Got a similar guy who does the Z4 for me. Theyโ€™re hard to come by.
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19221994th Mar 2018 3:48 pm
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

Am I chasing rainbows here. I presume I should be able to expect the aux heater to run several times of day. A reasonable couple of runs would be useful.

New battery fitted today but the old one passed load test etc. Same with the alternator - consistently supplying 14.7V under load at idle. So, I'm back to square one on the aux heater failing to run for a full cycle when it was most needed.

It's looking less likely to be the battery directly causing the problem. Don't see quiescent drain causing it because the heater ran for only 6 minutes after I took it off charge. It switched off before chucking out any real heat and it was -4 or lower then

So, a couple more questions.
Is it the heater or the car that commands a shutdown on low voltage and what voltage level is chosen and what measures it and where.
Could the heater be demanding far more current than the normal start-up and run demand? There are rather a lot of Watts available from a 95Ah battery. Most things should be able to take a few hours from the cells keeping it cool. L

12.6V. At the battery tonight but that was dropping slowly. 12.2V after a while. Got 5 hours motorway driving tomorrow. That should see enough charge put in the new battery.

Hoping that it won't be needed now until the back end of the year, but, if anyone locally has the webasto diagnostics capability an hour of your time would be gratefully received.

Hopefully there has to be a problem hidden away somewhere otherwise having the aux heater is only useful with the engine running. A bit like having a dog and barking yourself.
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19233236th Mar 2018 11:54 pm
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Member Since: 20 Jan 2018
Location: Warwickshire
Posts: 120

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

Maybe a clue as to what's happening on the battery voltage that is affecting the aux heater.
Did over 200 miles and monitored the voltage (as well as the cabin temp) over the journey.

Always up at 14.6/14.7V for the whole journey.
After switching of after 100 miles the battery voltage slowly decayed was readying 12.8V. Six hours later it was down at 12.5V. Wasn't expecting such a drop but maybe that is typical.

Again, it maintained 14.6/14.7V for the whole journey back.

Get home then after twenty minutes had to move the car.
On starting up the heated screens came on and the voltage never went above 11.7V until I switched them off - even revving to 1,500rpm. Put them back on and after a brief drop it went back up to 14.7V.
Back to a suspect alternator? Any thoughts?
 Current : Discovery 4 HSE (2012 spec)
Current : BMW Z4 20i MSport
Current : BWM Z4 3.0SI Sport Auto
Previous : Freelander 2 HSE 
 
Post #19237147th Mar 2018 11:21 pm
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ontheair79
 


Member Since: 03 Mar 2018
Location: Dublin
Posts: 15

Ireland 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Quick question if low coolant level will affect star of FBH. I have Discovery 3 since 3 weeks and had lots of cold mornings but FBH never started. Fit bread new battery. Clear all errors, check fuses, reset FBH. No luck. Waiting for spring.
  
Post #19241479th Mar 2018 9:43 am
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Sloss
 


Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1657

Scotland 

Ontheir79,

Search on this Forun for FBH, There is loads of info and how to's.

They can be very frustrating things Laughing
 Stew,

2010 D4 gone but I really loved it
Went back to Merc - C350 AMG 
 
Post #19241809th Mar 2018 12:06 pm
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