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ThreeSheds

Random musings on the D4

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58 minutes ago, Red90 said:

AGM are better from physical damage, but they are no better as a "battery".  Cycle life and sulfudation resistance is worse than a properly built flooded battery.  Unless you "need" one do to hard off road use, they are a waste of money.

This would appear to be at odds with much of what I have read, but then I have read it on the internet so who knows if it's right or not. Thanks for your comment :)

59 minutes ago, Red90 said:

The problem with modern cars and I'm sure the D4 is no exception is that they turn the alternator off as much as possible with the goal of saving fuel.  It kills batteries.

Now that IS something new... I have not heard of that one but it kindof makes sense...

How do they 'turn them off'? I have noticed that when the D4 is on a longer journey the voltage starts out at 14.7 volts, then after a while it drops to 12.6 - this is (I assume) when it's stopped charging the battery (ie I think it's at 100%) and the alternator is merely producing enough juice to power whatever is running... but I don't think that would count as turning it off???

Rog

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The computer controls the alternator.  Yes, when it drops to 12.6, the alternator is off.  Here in the land of winter, new cars go through battery in 2 to 3 years.  Before they started this silly alternator control, you would get 10 years.

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Got the GAP Diagnostic IID Tool yesterday and got it set up last night - a bit of a faff but made it in the end... So  - to the error codes!

  1. DABM-Digital Radio      B1A56-13 ("F) Antenna circuit - General electrical failure - circuit open 
  2. DDM-Driver Door           B110A-11 (6C) Rear door driver side central locking motor - General electrical failure - circuit short to ground

Well I guess I am a bit disappointed, but it could be (a lot) worse. The DAB fault probably explains why the DAB radio is poor, although since I live in rural Aberdeenshire I don't expect much on that front anyway, and I still have VHF radio...

It's a shame about the door - it's been that way since November and I never noticed! Good job it didn't get nicked eh? Anyway - I can lock it from the inside, manually, but obviously it is something I have to get fixed. Now... I have one of those 'second hand car breakdown insurance' things, and I have never thought them to be any good, but we will see... The company is "Warranty Wise" which do have a decent reputation. Be interesting to see how this goes. Watch this space! :D 

I guess that overall I am pleased that there is nothing too bad, lets hope it stays that way!

Rog

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20 minutes ago, ThreeSheds said:

I guess that overall I am pleased that there is nothing too bad, lets hope it stays that way!

I would take the faults that the IID tool reports with a minor pinch of salt - you get quite a lot of white noise from it. My old L322 used to report all sorts of errors - fan circuits open, drivers seat circuits open, speakers etc etc. If you cleared them, they'd come back again fairly soon. Everything worked though, so no idea why things would trigger...

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On 2/20/2019 at 9:02 AM, =jon= said:

I would take the faults that the IID tool reports with a minor pinch of salt - you get quite a lot of white noise from it. My old L322 used to report all sorts of errors - fan circuits open, drivers seat circuits open, speakers etc etc. If you cleared them, they'd come back again fairly soon. Everything worked though, so no idea why things would trigger...

Thanks - I'll remember that.. There were loads that didn't come back once cleared, but the back door actually doesn't lock, and the DAB radio is poor, and  both faults were reported again after being cleared :(

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Most annoying thing so far on this car:

You can't just roll it forwards a few feet...

I often park the car reversed up to the garage door, which is a little bit up hill. This morning I needed access to the rear of the car and there wasn't enough room for the tailgate to lift up. So I got in the car with the intent of rolling it forward a couple of feet. 

And of course you can't get it out of P without starting the engine! And since it it below 5oC out there, the FBH started up, and continued running after I had finished and came inside. All in all a big hit on the battery and probably 1/2 a litre of fuel wasted...

It's a great car and all but sometimes I just hanker after something a bit more basic - like my old 80" series 1... :D:D:D

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Fuel consumption testing... 

Two checks from tank full to tank full, 340 miles and 268 miles of mixed commuting and country driving (FYI my commute is mainly 60mph roads)...

Calculated values about 26mpg, when the instruments 'average mpg' value is about 28mpg.

 

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Very good, a mate only manages 20 if he is really restrained -but that is just not his driving style!

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3 hours ago, Bowie69 said:

Very good, a mate only manages 20 if he is really restrained -but that is just not his driving style!

:D It's an easy car to drive fast (well faster than you should, anyway)

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