Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
Low Power Mode - when should it kick in
Since the day after my 105K service I have been getting Low Power Mode come up on the radio. It usually comes on ok but then after driving up the motorway (1500 - 2000 RPM), with no lights or anything else on this afternoon and nothing changing went go into Low Power Mode, it has been usually 10 - 15 min after starting.
Did a few voltage checks this afternoon and got 12.34 when stopped and ranged between 13.93 and 13.5 dependant on load at tickover. It seemed to be ok for a while and then again went into low power mode with no change in the battery voltage.
Does this voltage sound about right or is it perhaps a little low?
Also, with the car running, if you look down to the left of the fan, you can see the tensioner, this seemed to be moving quite a bit when at steady revs, is this normal or should it be pretty static?Joined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
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23rd Jan 2012 5:36 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72798
Looks to me like alternator's fooked, should be 15.3v
PS I had this on a 600 mie drive, took it to the dealer after & they couldn't find a fault. It's never come back since, despite carrying a spare alternator around with me for 2000 miles.
Last edited by DSL on 23rd Jan 2012 5:42 pm. Edited 1 time in total
23rd Jan 2012 5:39 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
I'm hoping you are wrong after seeing how much they are It just seems very co-incidental to my 105K service,Joined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
Convoy for Heroes 2011
23rd Jan 2012 5:42 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72798
Me too but see above, may be hope. Pos car was just complaining about your music?
23rd Jan 2012 5:45 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
Looking at it, it doesn't look like they changed the fan (alternator) belt. Although on the check list they gave me it has Replace timing belt (the obvious one) but it also has "Replace Drive Belt" (PQS500370) but it isn't itemised in the receipt, which one is that, front or back?Joined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
Convoy for Heroes 2011
23rd Jan 2012 6:06 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
PQS500370 isnt a front or rear timing belt, can only presume its the aux belt...
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
Ok, so I have now compared tensioners on another car and maybe mine are ok, I have also been assurred that the belt was changed, so before I buy a new alternator, what other checks can I do, I am getting around 13.9V no matter the load at tickover and has anyone found anywhere that can refurb them?Joined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
Convoy for Heroes 2011
24th Jan 2012 5:06 pm
BrianT
Member Since: 17 Nov 2009
Location: Ayrshire
Posts: 2069
PM sent MY 16 Landmark Santorini Black
MY 05 SE Adriatic Blue (Gone but not forgotten)
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