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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green
KeyFob - the inside story....

My spare key fob wasn't playing very well - seemed to only work occassionally. So using some information read on this forum I decided to open it up.

Only to find that pressing the buttons on the circuit board worked every time Very Happy

Here is what I found inside:



 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94333 6th Mar 2011 5:13 pm
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superspark



Member Since: 24 May 2009
Location: Devon
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United Kingdom 2008 Freelander 2 TD4 SE Manual Izmir Blue

Yer, not much to it is there? The price we have to pay for a new one is a complete rip off. Banging Head

Post #94338 6th Mar 2011 5:45 pm
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

An absolute Censored to get open. Took ages then it just suddenly gave way.....

I suppose if they were made and sold by everyone they would be cheaper - and the programming is in the price as well.

Off to the 1.00 shop for some super-glue. 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94341 6th Mar 2011 6:45 pm
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ptecuk



Member Since: 01 Feb 2010
Location: Midlands
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United Kingdom 2014 Freelander 2 TD4 HSE Auto Firenze Red

Very interesting. Would like to know what you used to open it up without destroying the case. It looks as though the battery is not a replaceable item. Connections appear to be spot welded and presumably it is a special rechargeable button cell charged by induction when in the vehicle slot. 2007 TD4 SE Manual
2014 TD4 HSE Auto

Post #94348 6th Mar 2011 7:16 pm
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

The battery is a VL2330 +3V button cell (this was stated correctly in another thread)

To get the case open I used stanley knife, small and large slotted screw driver. And a lot of force Wink

It will look opened when it is put back together - so a bit of plastic magic will be needed once glued - and it becomes the "spare" - but not forgetting to use it occassionally to give it a charge. 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94350 6th Mar 2011 7:20 pm
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

I should add - I believe the battery connection is soldered! (needs to be confirmed)

The case back has a rubber insert which appears to apply pressure against the battery contact so I guess a battery could be put in and not soldered / welded. 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94351 6th Mar 2011 7:23 pm
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superspark



Member Since: 24 May 2009
Location: Devon
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United Kingdom 2008 Freelander 2 TD4 SE Manual Izmir Blue

Looking at the pictures of it on here there is a tag spot welded on to the cell then the other end of the tag is soldered to the contacts.
The reason for this is "HEAT" Heat will destroy the componds inside the button cell causing a greatly reduced life span and the ability to hold a charge.
Spot welding is intant with very little heat tranferance to the cell. Soldering, you have to get the surface of what you are soldering hot before the solder will stick, this process will transfere to much unwanted heat to the cell. Thumbs Up

Post #94371 6th Mar 2011 8:52 pm
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scrimple



Member Since: 07 May 2010
Location: Allington
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United Kingdom 2013 Freelander 2 SD4 XS Auto Ipanema Sand

Just to add my 2 pennarth, you could always solder a strip on the circuit board then form it over the top of the cell and put a kink in it so when you glue it back together, the kink will act as a spring on the case and keep pressure onto the cell.

In the past, I have used the lever from a micro switch for this type of thing.

Good to know there is nothing unusual in the key fob from the look of it, though yours does look as though it may have had some water or condensation in it from the look of the circuit board.  MY2014 SD4 XS
Ipanema Sand

MY10 TD4-e GS Manual
Lago Grey Now retired after 8 trouble free years

Post #94387 6th Mar 2011 9:37 pm
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

scrimple wrote:
Just to add my 2 pennarth, you could always solder a strip on the circuit board then form it over the top of the cell and put a kink in it so when you glue it back together, the kink will act as a spring on the case and keep pressure onto the cell.

In the past, I have used the lever from a micro switch for this type of thing.

Good to know there is nothing unusual in the key fob from the look of it, though yours does look as though it may have had some water or condensation in it from the look of the circuit board.


On close inspection there is no trace of water or moisture damage - perhaps just not perfect pictures. But I do agree with your suggestion about replacing the contact arm. Thumbs Up 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94392 6th Mar 2011 10:29 pm
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scrimple



Member Since: 07 May 2010
Location: Allington
Posts: 294

United Kingdom 2013 Freelander 2 SD4 XS Auto Ipanema Sand

Hi simont

Sorry, didn't mean to give the impression of damage.

It's just if you look at the circuit board there appears to be a whitish haze around and on a couple of components, I have noticed this before on boards that have been exposed to condensation.

It is not damage as such, but it can cause a reaction with the battery, and as you said it was playing up a bit, it could manifest as a bit of corrosion or dry joint on a component and work intermittently.  MY2014 SD4 XS
Ipanema Sand

MY10 TD4-e GS Manual
Lago Grey Now retired after 8 trouble free years

Post #94394 6th Mar 2011 10:53 pm
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julytourist



Member Since: 16 Dec 2010
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United Kingdom 2010 Freelander 2 TD4 HSE Auto Rimini Red

Congrats on adding to the knowledge base!
But, how did taking it apart solve the original problem?
The circuit buttons 'worked ok' On reassembly did the cover buttons now work?
Just curious
JT Upgraded to an ex demo, 7 mth old, Rimini Red/Ebony Napoli Auto HSE on 28th Jan 2011, added roof rails, mudflaps and side strips.
Gone - A great 57 Plate, Auto SE, Bought Feb 2009, Roof Rails and Mudflaps added on purchase. Blue colour, anything but drug dealer black.....

Post #94400 6th Mar 2011 11:36 pm
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

Hi Scrimple

I don't take offence too easily. Smile

I think it is just bad lighting - The fob was tightly sealed. 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94406 7th Mar 2011 7:07 am
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

julytourist wrote:
But, how did taking it apart solve the original problem?
The circuit buttons 'worked ok' On reassembly did the cover buttons now work?
Just curious
JT


It isn't quite fully assembled yet!

Haven't been able to figure that out yet - doesn't really make sense Confused

Greatly worrying as I'm a trained 'electronics engineer' Embarassed

I feel it is something to do with the fact that the rubber button has a X inside which presses against the micro switch on the PCB.

So I think I will leave it unglued for now and use it as a spare. 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94407 7th Mar 2011 7:14 am
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colinrr



Member Since: 08 Feb 2011
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United Kingdom 2011 Freelander 2 SD4 HSE Auto Stornoway Grey

superspark wrote:
Looking at the pictures of it on here there is a tag spot welded on to the cell then the other end of the tag is soldered to the contacts.
The reason for this is "HEAT" Heat will destroy the componds inside the button cell causing a greatly reduced life span and the ability to hold a charge.
Spot welding is intant with very little heat tranferance to the cell. Soldering, you have to get the surface of what you are soldering hot before the solder will stick, this process will transfere to much unwanted heat to the cell. Thumbs Up


I imagine it's more likely that the tag comes spot welded to the battery and the connection is made at the other end of the tag by soldering.

Colin 1982 RR Classic-converted to 200TDi-gone
1992 RR VogueSE- converted to autogas-gone
2000 FL1 3dr (wife's)
1996 Disco 1 300 Tdi(gone)
2007 FL2 TD4 GS auto (gone)
MY 2011 SD4 HSE Automatic

Post #94411 7th Mar 2011 8:24 am
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simont



Member Since: 15 Feb 2011
Location: Sunderland/Newcastle
Posts: 1798

England 2007 Freelander 2 TD4 GS Manual Tonga Green

Battery and tags...

The Answer Thumbs Up

http://uk.farnell.com/jsp/displayProduct.j...2-00001000[/url]

and you can see the two soldered tags on the photo showing the component side. (bottom right and just above centre left) 2007 FL2 GS Manual Army Reconnaissance Green + freel2.com sticker Smile
2004 Toyota Celica 140 Black - Gone
2000 Toyota Celica 140 Silver - Gone
1998 Toyota Celica ST Pearl Green - Gone
1996 Nissan Primera 1.6 - Gone
1994 Rover Montego 1.6 Auto - Gone

Post #94413 7th Mar 2011 8:59 am
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