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Discussion Starter · #1 ·
Hello all,
I have Jag XF Luxury 2013.
Unfortunately, the air vents are not rotating automatically or blowing air at all, I have tried to check the fuse, but it was alright.
Also, the front/back heated windscreens and heated seats are not working! I don't know if there is something common between them!
I have tried to bypass the pre-heat system (as per here
) underneath the gloves box, but no change. The voltage there was around 14 V, so I'm assuming it is alright till this point!

I am really confused and don't know what needs to be checked

Would you guys advise on what to do please?
 

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🏴󠁧󠁢󠁳󠁣󠁴󠁿X260 R-Sport in Aurora Red
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How old is your battery?
Might be worth opening your boot , wait 10 (mins) keep keyfob well away, then disconnect negative lead on battery for at least 5mins then reconnect.
also check for water ingress in bcm/fuse boxes search on here on how to
 
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Discussion Starter · #3 ·
How old is your battery?
Might be worth opening your boot , wait 10 (mins) keep keyfob well away, then disconnect negative lead on battery for at least 5mins then reconnect.
also check for water ingress in bcm/fuse boxes search on here on how to
I don't know how old is it exactly, it was there since I bought it!
Actually, the battery was flat. I jump-started it, then it works fine
Do you think I still need to do this disconnection?
Didn't understand why to wait the first 10 mins!
There is no water ingress in any of fuse boxes!
 

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🏴󠁧󠁢󠁳󠁣󠁴󠁿X260 R-Sport in Aurora Red
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If it works fine no need to disconnect, 10 mins, some XF‘s loose key fob configuration if they battery is disconnected whilst the car is still ’speaking’ to modules around the car waiting 10 mins ensures these modules have gone to sleep.
Your battery will have lost some of its capacity now.
 
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You have to wait at least 10 mins for the car to shut down.
 
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Material property Font Parallel
 
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Discussion Starter · #7 ·
If it works fine no need to disconnect, 10 mins, some XF‘s loose key fob configuration if they battery is disconnected whilst the car is still ’speaking’ to modules around the car waiting 10 mins ensures these modules have gone to sleep.
Your battery will have lost some of its capacity now.
So, it this is not needed to be done, what else should I look at please?
 

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🏴󠁧󠁢󠁳󠁣󠁴󠁿X260 R-Sport in Aurora Red
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“Actually, the battery was flat. I jump-started it, then it works fine”
so it not fine.
charge the battery first so it’s at least 12.7v
 
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As Gav said first thing is to charge the battery. Check it again the next morning, if it is 12.6 volts it is probably OK but if it is over 5 years old it may be best to change it. If it is 12.6 the following day turn on the sound system without engine running if it say's system is going to shut down in a few minuets it is on its way out. If OK do what Gav said earlier.
 

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Discussion Starter · #12 · (Edited)
“Actually, the battery was flat. I jump-started it, then it works fine”
so it not fine.
charge the battery first so it’s at least 12.7v
I spent at least two hours on motorway, so I think it has been fully charged, is this right?
 

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I spent at least to hours on motorway, so I think it has been fully charged, is this right?
Normally, yes. But if the battery is old and tired, it may not hold the charge. And the XF is very, very sensitive to low battery charge, shutting down non-essential systems to preserve life! And my bet lies there.
 

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If your battery has been totally flattened, it will likely never regain maximum capacity ever again. As OBC John says, XFs are incredibly sensitive to failing batteries.
 
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If you're anywhere close to me (Ripley, Derbyshire), I have a battery for sale.

AGM battery for sale
 
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I don't know how old is it exactly, it was there since I bought it!
Actually, the battery was flat. I jump-started it, then it works fine
Do you think I still need to do this disconnection?
Didn't understand why to wait the first 10 mins!
There is no water ingress in any of fuse boxes!
Please note a very important point about that 10mins waiting time.
During that 10mins, the key fob should not be near the car. It should be atleast 5m away from car. Don’t leave it in your pocket. It can wake systems up and if they are not shutdown before battery disconnection, you might corrupt the memory data of some critical systems on the car.
 

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Stating the obvious, have you changed the settings for all of these from their defaults to what you want after the battery went flat? You will probably need to do this again after replacing the battery.
 

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Discussion Starter · #19 ·
Hello all,
I have Jag XF Luxury 2013.
Unfortunately, the air vents are not rotating automatically or blowing air at all, I have tried to check the fuse, but it was alright.
Also, the front/back heated windscreens and heated seats are not working! I don't know if there is something common between them!
I have tried to bypass the pre-heat system (as per here
) underneath the gloves box, but no change. The voltage there was around 14 V, so I'm assuming it is alright till this point!

I am really confused and don't know what needs to be checked

Would you guys advise on what to do please?
How old is your battery?
Might be worth opening your boot , wait 10 (mins) keep keyfob well away, then disconnect negative lead on battery for at least 5mins then reconnect.
also check for water ingress in bcm/fuse boxes search on here on how to
I measured the voltage after nearly half an hour drive, the voltage was 12V, I checked it back in the morning, and it was 11.9V...... How much should it expected to be please?
Do I still need to open the boot, wait 10 mins keep keyfob well away....etc?
Attached is a picture of my the battery I have
 

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With readings like that, the battery is kaput. Get a new one.
 
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