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mattdaniels
 


Member Since: 23 May 2010
Location: Milton Keynes
Posts: 85

England 2008 Discovery 3 TDV6 HSE Auto Tangiers OrangeDiscovery 3
Low Power Mode

Over the past few days we've been getting the message "Low Power Mode" come up on the radio display. You're driving along listening to the radio and all of a sudden it goes silent on all stations. If you try and turn the volume up, the message "Low Power Mode" comes up.

Any ideas what this is / how to fix ?
  
Post #7579447th Feb 2011 3:43 pm
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dtest
 


Member Since: 02 Jan 2011
Location: Weybridge
Posts: 140

United Kingdom 

It will be a battery issue Smile
  
Post #7579477th Feb 2011 3:45 pm
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Dan_NL
 


Member Since: 19 Sep 2010
Location: world
Posts: 1213


Matt, if it comes up while driving I wouldn't think of the battery first. That would be if it were before starting the car even after stopping briefly during a long trip. I think the charging doesn't work properly, unless you put ALL electrics and heatings on and keep it all going for a while... if then after 30mins 'Low power mode' comes up, its logical : switch off the seat heating, its not intended for permanent use... So get at your battery and measure the voltage. Should go up to 14.5V when the engine runs [also visible on the screen of you satnav through the 1st 'secret button' sequence]. If the voltage is too low while charging the belt could be slipping on the alternator or the alternator has corroded contacts etc... A worn bearing in the alternator could also cause the problem then..
  
Post #7579757th Feb 2011 4:18 pm
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mattdaniels
 


Member Since: 23 May 2010
Location: Milton Keynes
Posts: 85

England 2008 Discovery 3 TDV6 HSE Auto Tangiers OrangeDiscovery 3

Thanks for the info. We don't have the poo-bakers switched on unless it's necessary. What's the first secret button sequence?
  
Post #7585258th Feb 2011 11:10 am
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Dan_NL
 


Member Since: 19 Sep 2010
Location: world
Posts: 1213

low power

Matt, there is a posting [cannot find it anymore] about a hidden button on the satnav screen left off the top buttons. If you have a satnav and want to know, send me your e-mail adress. I copied-pasted two series of pics into a word document you can print & take to your car to try... It gives you eg 'live' voltage of your car battery
'on the move' and plenty other stuff.. Cheers, Dan
  
Post #7585838th Feb 2011 1:47 pm
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thorgal
 


Member Since: 26 Nov 2008
Location: on the east side
Posts: 541

United States 2005 LR3 4.4 V8 HSE Auto Bonatti GreyLR3

Somehow , I cannot get a secret button to work...
  
Post #7586578th Feb 2011 4:20 pm
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mattdaniels
 


Member Since: 23 May 2010
Location: Milton Keynes
Posts: 85

England 2008 Discovery 3 TDV6 HSE Auto Tangiers OrangeDiscovery 3
Re: low power

thanks for the email willl give it a go
  
Post #7592109th Feb 2011 6:06 pm
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HughMartin
 


Member Since: 30 Mar 2008
Location: Aberdeenshire
Posts: 751

Scotland 2012 Discovery 4 3.0 SDV6 XS Auto Aintree GreenDiscovery 4

I had this problem and the problem was traced back to a battery change a couple of months ago. My 5 year old battery had given up the ghost and I replaced it with a new one without ensuring the new one was fully charged. The problem only came to light when I was playing a CD which lends itself to high volume and when I turned the volume up the "Low Power Mode" message was displayed on the radio. Also notice that heated seats and windscreens not working. A quick search on this forum found a post which indicated that when a new battery is fitted, the system senses the battery voltage and will regulate to that voltage. "No problem", I thought. I whipped the battery out and put it on charge for a few hours. Refitted battery but problem still there. Battery voltage as shown on a multimeter plugged into cigarette lighter socket showing as 12.5v at idle and 13.5 at normal driving speed. My charger is a cheap 4amp charger so I borrowed a friends heavy duty charger and it needed about 18 hours before the voltage peaked at 17v while still attached to the charger. Battery refitted and now getting 14.3v when running and "Low Power Mode" message now cleared and everything else operating normally.

Lessons learned:-

1. Make sure a new battery is FULLY charged using a decent charger.
2. When charging a battery, use a good quality digital voltmeter and plot voltage increase on graph paper until voltage peaks and stabilises. Should be in excess of 17v when still attached to charger.
3. Don't rely on "secret screen" battery voltage displayed on GPS screen. It under reads significantly on my car and only reads in half volt increments. Use a decent digital voltmeter plugged into a DC socket or wired directly to the battery.
  
Post #7699623rd Mar 2011 7:59 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Hugh, did that fix the problem to date?? Got similar problem. Sad
   
Post #78917424th Apr 2011 8:49 am
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dwest
 


Member Since: 05 Apr 2011
Location: ashford, middlesex
Posts: 23

England 

Check your mad sensors connected aswell,
  
Post #78917924th Apr 2011 9:13 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

SWMBO would say my mad sensor's been working ever since she met me!! Snigger
   
Post #78918724th Apr 2011 9:37 am
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dwest
 


Member Since: 05 Apr 2011
Location: ashford, middlesex
Posts: 23

England 

Haha, bloody iPhones, MAF Laughing
  
Post #78921024th Apr 2011 10:43 am
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HughMartin
 


Member Since: 30 Mar 2008
Location: Aberdeenshire
Posts: 751

Scotland 2012 Discovery 4 3.0 SDV6 XS Auto Aintree GreenDiscovery 4

Hi DSL,

It didn't fix it for long. Ended up having to get a new alternator. I was only getting 12.5-13 volts out of the old one and it should have been giving over 14v.
  
Post #78945925th Apr 2011 2:19 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Got a new alternator sorted via TFC & TLO. Thumbs Up
   
Post #78946325th Apr 2011 2:23 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

Got my car back today. Guava couldn't find a problem with the alternator, no error codes and everything was ticketyboo. On 20 miles back home bangin toonz were up at 35 no problem. Will keep an eye on it, I know she's messing with my mind but if i'm nice to her hopefully she won't sulk at the side of the peage! Whistle
   
Post #78991226th Apr 2011 8:22 pm
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