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Key charging
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3
Key charging

After using the search feature I have come here to ask about the key charging of my D3.
I have had the vehicle for 4 years and changed the batteries in both keys a couple of times.
Before I replace the batteries again I thought I would ask how I could go about testing the vehicle side of this system before I take the keys apart again.
  
Post #213206127th Mar 2020 6:53 am
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1772

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

Good question, watching with interest. I changed my batteries around four years ago and they are working okay.
  
Post #213210727th Mar 2020 10:10 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

for anyone else reading, the key is charged when it is in the ignition


so use the spare now and again
  
Post #213211727th Mar 2020 10:52 am
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darrind
 


Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863

England 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Worth ensuring the key is actually fitted with a rechargable cell as a lot get replaced if the key has a new casing - then more often than not they use a much cheaper non recharge cell.

Out of interest did you know you can use a charger for an electric toothbrush to charge them?
 Must stop buying shiny toys....  
Post #213216727th Mar 2020 2:26 pm
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1772

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

Quote:
Out of interest did you know you can use a charger for an electric toothbrush to charge them?

Show how as this would be handy for the spare key
  
Post #213230627th Mar 2020 10:22 pm
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Pete K wrote:
for anyone else reading, the key is charged when it is in the ignition


so use the spare now and again


I do
  
Post #213231327th Mar 2020 11:04 pm
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

darrind wrote:
Worth ensuring the key is actually fitted with a rechargable cell as a lot get replaced if the key has a new casing - then more often than not they use a much cheaper non recharge cell.

Out of interest did you know you can use a charger for an electric toothbrush to charge them?


The batteries that I fitted are rechargable
  
Post #213231527th Mar 2020 11:05 pm
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

How would I test the bit of the car that does the charging?
 

Last edited by G7jtk on 27th Mar 2020 11:13 pm. Edited 1 time in total 
Post #213231627th Mar 2020 11:06 pm
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darrind
 


Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863

England 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Easy to recharge - you need an Oral B electric toothbrush charger - lean the key against it overnight and it should be sorted
 Must stop buying shiny toys....  
Post #213231727th Mar 2020 11:07 pm
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L319
 


Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2079

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

G7jtk wrote:
How would I test the bit of the car that does the charging?

If the key keeps working , the car must be charging it. They don't last long if not.
  
Post #213232927th Mar 2020 11:37 pm
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Does this leave me with the problem of it it the keys or is it the car that is at fault
  
Post #213234128th Mar 2020 6:52 am
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1772

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

You need some means of reading "proximity" voltage. When the key is in and the engine is running you need to able to read the voltage that is being output around the key.
  
Post #213236228th Mar 2020 8:26 am
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L319
 


Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2079

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

L319 wrote:
G7jtk wrote:
How would I test the bit of the car that does the charging?

If the key keeps working , the car must be charging it. They don't last long if not.

I see I misunderstood the question, I didn't realize the keys weren't charging
  
Post #213236628th Mar 2020 9:11 am
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G7jtk
 


Member Since: 03 Jun 2014
Location: Prudhoe
Posts: 845

England 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

To clarify.
Nothing happens when I press the buttons on one key and the indicators flash once but don’t unlock the car. If I press again nothing happens. The car drives with both keys.
  
Post #213237028th Mar 2020 9:26 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

Not tried this but ...
Given a toothbrush charger will charge the key, then possibly an electric toothbrush could be used to detect activity of in car charging circuit?

Better still ... does the toothbrush system work same way as wireless mobile phone charging? If so a phone would show charging was working.
 .


Dean
====================================

2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer Sad ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms 
 
Post #213238528th Mar 2020 11:03 am
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