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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2147
United Kingdom 
When you started the engine , did the red alarm light on the dash ( that flashes when vehicle is locked and alarm is on ) stay on ( not flashing but on ) with the engine running. If so this is a sign that the fob battery needs replacement. Noting that the fob communicates with the alarm to enable the engine to start, hence it should be on the same keyring as the key as it communicates with an antenna near the ignition barrel. If the battery in the fob is too low then it can’t broadcast to the antenna and hence the vehicle won’t start.
So make sure you fob batteries are new to discount that as your issue.
Post #1004907 20th Aug 2023 9:14pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1679
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Vmax wrote:
Fob is working thank you very much.
Do l need to do a diagnostic on the immobiliser. Or l do some driving test for a few days to double check is going start.


No sorry I misunderstood and thought you had changed the alarm control module.
Post #1004909 20th Aug 2023 9:26pm
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Vmax



Member Since: 29 Apr 2023
Location: Europe
Posts: 73
Gibraltar 2008 Defender 110 Puma 2.4 SW Baltic Blue
No worries Sir.
Post #1004914 20th Aug 2023 10:02pm
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Vmax



Member Since: 29 Apr 2023
Location: Europe
Posts: 73
Gibraltar 2008 Defender 110 Puma 2.4 SW Baltic Blue
Ianh wrote:
When you started the engine , did the red alarm light on the dash ( that flashes when vehicle is locked and alarm is on ) stay on ( not flashing but on ) with the engine running. If so this is a sign that the fob battery needs replacement. Noting that the fob communicates with the alarm to enable the engine to start, hence it should be on the same keyring as the key as it communicates with an antenna near the ignition barrel. If the battery in the fob is too low then it can’t broadcast to the antenna and hence the vehicle won’t start.
So make sure you fob batteries are new to discount that as your issue.

Double check on the red light tomorrow to be 100% .
On the l put new batteries.
Post #1004916 20th Aug 2023 10:07pm
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Vmax



Member Since: 29 Apr 2023
Location: Europe
Posts: 73
Gibraltar 2008 Defender 110 Puma 2.4 SW Baltic Blue
Ianh wrote:
When you started the engine , did the red alarm light on the dash ( that flashes when vehicle is locked and alarm is on ) stay on ( not flashing but on ) with the engine running. If so this is a sign that the fob battery needs replacement. Noting that the fob communicates with the alarm to enable the engine to start, hence it should be on the same keyring as the key as it communicates with an antenna near the ignition barrel. If the battery in the fob is too low then it can’t broadcast to the antenna and hence the vehicle won’t start.
So make sure you fob batteries are new to discount that as your issue.


I locked the vehicle started it up . The red light does not go on . No red goes on or it flashes .
Is that okay or has a problem?
Post #1004976 21st Aug 2023 12:06pm
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