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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
The key fob is not unlocking/ locking or even causing the hazards to flash
Nor is the central locking working from within the vehicle. This came about after the battery being flat but to my knowledge it is possible to repeatedly press the lock/ unlock key and the fob should reassign itself? Does not appear to be working. I have checked fuses and they’re still supplying voltage now the battery is replaced. Any suggestions please. 4.0 V8 Defender 90 My Instagram |
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5th Sep 2024 6:08pm |
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custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20290 |
Is the battery in the fob a new one? ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️
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5th Sep 2024 6:11pm |
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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
It is a brand new battery, yes. Quite frustrating... 4.0 V8 Defender 90
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5th Sep 2024 6:11pm |
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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
Good suggestions, It wasn't long ago since the contacts for the earths were infact wire brushed fresh since the build but we know how quickly things can corrode again. I will have to check the voltages over the weekend while I drive the other car and report back. I am too leaning towards the AS10 or a voltage problem, as this issue was at first intermittent and so became a developing problem, potentially.
(When checking the fuse voltages is was sat at 12.5v and 14.2v while running, which I believe to be acceptable) 4.0 V8 Defender 90 My Instagram |
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5th Sep 2024 6:36pm |
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custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20290 |
Yeah, that is acceptable voltage ranges.
It has been known for water to get in or around the AS10 / its contacts plug etc. You could add a temporary earth and see any difference if any, and there is also the rear loom grounds as well as the main one. Good luck. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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5th Sep 2024 9:33pm |
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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
Thanks for all this, I'm seriously not looking forward to tackling this one 4.0 V8 Defender 90
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6th Sep 2024 7:06am |
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bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3248 |
Don’t know if this will help, this is how you sync the key fob on a TD5.
With vehicle unlocked, take battery out of fob and then hold both buttons down for 10 seconds to drain residual power. Battery back in then press lock four times and unlock once. That will sync the fob back to the ECU. 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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6th Sep 2024 8:42am |
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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
I'll give this a go too, thank you very much 4.0 V8 Defender 90
My Instagram |
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6th Sep 2024 8:44am |
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LJMARSDEN Member Since: 08 Jun 2021 Location: Nottingham Posts: 325 |
Turns out the immobilization fuse has 12v going to it. i removed both of the engine kill fuses in the underseat fuse panel and inserted them again and there we have it. working.
Very weird, concerning and suspicious.... 4.0 V8 Defender 90 My Instagram |
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6th Sep 2024 2:22pm |
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custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20290 |
It could be the contacts the fuse is seated into is loose, a little bit of corrosion or moisture.
Defenders get very high vibration levels and things can get loose by themselves, and then that causes voltage drop over the two fuse contacts by high resistance due to poor contact. But then that can vary by things such as atmospherics, wet conditions, cold weather, warmer weather and things like that sort of thing. Glad it’s working for you, if the issue comes back I’d take a look at the fuse holder contacts, just the check they are clean and tight. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️ |
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6th Sep 2024 4:01pm |
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