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Desertdisco
Member Since: 09 Dec 2021
Location: Upington
Posts: 4
  
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| Key fob not working and Engine wont start |
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Hello all,
New to the forum, but have been an avid reader for some time, hope you are all well.
About a month ago I replaced the Head Gaskets on my 07 TDv6, run about 1000km since then, no problems at all.
Today I decided to put a new battery on. Disconnected the battery, old one out new one on. Now the keyfob isnt working, does nothing at all, and the engine just turns over, not even trying to start/fire.
Im more of a mechanical man, so would appreciate any help, but to my mind somehow changing the battery has caused the key, and I presume Transponder to lose connection with the car.
Any thoughts on this and or possible solutions would be greatly appreciated? Justin
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 9th Dec 2021 2:02 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10414
 
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I’d disconnect the battery and leave it a few hours and reconnect.
If it’s cranking, I would think the imboliser was happy
Well on 2005 it is
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| 9th Dec 2021 2:06 pm |
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Desertdisco
Member Since: 09 Dec 2021
Location: Upington
Posts: 4
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Hello Pete, Thanks I will try that, but tried a hard reset and nothing, fob dead, and just turning over.
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| 9th Dec 2021 2:11 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12774
  
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Is the new battery fully charged?
If it's giving enough current out then car will crank, but if voltage drops too low whilst doing that, the electrics won't be happy.
Another thing in a vehicle of that age is the earth straps ... try connecting battery -ve to engine and/or body using jump leads. .
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  ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
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| 9th Dec 2021 3:06 pm |
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Desertdisco
Member Since: 09 Dec 2021
Location: Upington
Posts: 4
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Hello Dean,
New battery is definitely fully charged, red immobiliser light is going out so don't think it's related now to the keyfob ...Will check crank position sensor tomorrow.
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| 9th Dec 2021 3:43 pm |
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