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Discussion Starter · #1 ·
Hope someone has experienced this problem as I am at a loss.

My 2016 Swift SZL's battery went flat (after very cold weather). Its already been replaced a year ago. It has been re-charged now.

One of my key fobs stopped working some time ago, and now the other one has too (weirdly at same time as car battery went flat). I changed the batteries on both keyfobs with CR1616 batteries.

The fobs do nothing when I press the buttons.

I can open the door manually.

When I start the car, it just turns over but won't start.

The car has been supper reliable and always started on first turn.


Any ideas? I'm guessing if I contact my main dealer they will charge me the earth for even looking at it. :(


Thank you for any help.
 

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Look at the dash when you're trying to start the engine - do you see ANY lights that are not normally on - like a key or a padlock?
 

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2005 1.6 GV 3 dr Auto
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Jumbo - when you changed the fob batteries you might have lost the immobiliser 'chip' out of the key.
Is the fob part of the key with your car,the actual lock/unlock buttons have nothing to do with starting the engine.
 

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Discussion Starter · #8 ·
Jumbo - when you changed the fob batteries you might have lost the immobiliser 'chip' out of the key.
Is the fob part of the key with your car,the actual lock/unlock buttons have nothing to do with starting the engine.
Thanks, but I changed the battery in both, They seem very simple., There is no chip than could fall out?

I can see this spiralling out of control as the car will need to be collected and worked on. just because the battery went flat (which was changed last year). Never had problems like this with BMW or VW.
 

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2005 1.6 GV 3 dr Auto
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Is your key part of the fob though ? or is the fob separate from the key ?
Nothing to do with the battery - the chip just sits there next to the steering column and communicates with the ECU/immob.
 

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Discussion Starter · #10 ·
Is your key part of the fob though ? or is the fob separate from the key ?
Nothing to do with the battery - the chip just sits there next to the steering column and communicates with the ECU/immob.
I have no idea.

The key is similar to your pics, but there is no chip part I can see.

The car is a 2016 Szl

Is there not some kind of reset procedure?
 

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2005 1.6 GV 3 dr Auto
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Just had a look on Transpondery.com and it looks like it might be a similar chip as ours,but I cannot be absolutely sure.
Should be there somewhere - are you close to a dealer ?
If not a car Locksmith might be able to help out - they should be able to tell if the transponder chip is present with the key.
 

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Discussion Starter · #13 ·
Just had a look on Transpondery.com and it looks like it might be a similar chip as ours,but I cannot be absolutely sure.
Should be there somewhere - are you close to a dealer ?
If not a car Locksmith might be able to help out - they should be able to tell if the transponder chip is present with the key.
Yeah, looks like i'll have to go to the local dealer.

Ker-ching!!!!


Thanks for your help gents.
 

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Immobiliser has lost code for the keys. Dealer or mobile locksmith with a higher end scan tool shoukd be able to reprogram both keys.
 

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Discussion Starter · #16 ·
UPDATE. Put key in ignition and Yellow key warning light on dashboard has gone. Car now starts (but both keys still wont open/close remotely).

Contacted main dealer but they still haven't got back to me.

Wondering if the very cold weather may have helped towards the problem.
 

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2005 1.6 GV 3 dr Auto
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Great she decided to start :)
Check voltage on key fob batteries ? just in case a duff batch ?
Fob batteries fitted correct way round ?
Is there a fuse for central locking ?
 

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Discussion Starter · #19 ·
Great she decided to start :)
Check voltage on key fob batteries ? just in case a duff batch ?
Fob batteries fitted correct way round ?
Is there a fuse for central locking ?
Well I'm guessing now the yellow key light has gone out on the dashboard, the immobiliser has somehow recognised the key to allow the car to start?

The CR1616 batteries were a pack of 5. (Non branded).

I just found a diagram of the fuse box for a 2016 Swift and can't see any mention of locking. (Seems the fuse box is on right of leg room in fron of door).

Thank you for suggestions, Slowly homing in on problem. At least the car now starts and I can lock the door manually.
 

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Might be worth checking the fob battery if they are non branded,my partner used to work in a shop which changed batteries for people and she always recommends a good battery make - such as....
Renata or Duracell.
Just might be worth a few minutes with a multimeter to check voltage.

Perhaps something in the immob system has a little 'memory' battery which had run down with the flat battery ?and it has now charged up from the main battery ? complete guess LOL
 
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