Hi,
I'm from France and i own Two jaguar S and X type estate. Excuse my poor english but i am going to explain my problem i didn't resolve.
On my X type i have a battery drain each 24 hours. I changed the alternator, the battery twice, clean the EGR, and no way.
This is a 2L2 diesel automatic gear 2008. I am disappointed with that. Does somebody know or knew this problem?
Thank you for your help.
Pierre Luc

 

PLBL, what you need to do is get a multimeter that has a "2VDC" scale on it. Set the multimeter to that scale. You are then going to access the engine bay fuse box and touch the mulimeter to the top of each fuse. When you touch the top of each fuse, you are going to put the red lead on one of the silver posts on a fuse and the black lead on the other. Most fuses should read "0.000", but you may find 1 or 2 that are reading something other than "0.000". Write those fuses down and post them here. Repeat for the fuse box in the passenger compartment. With this information, I can then narrow down what your problem is and what is pulling the power when the car is off.

PLBL, ce que vous devez faire est de vous procurer un multimètre doté d'une échelle "2VDC". Réglez le multimètre sur cette échelle. Vous allez ensuite accéder à la boîte à fusibles du compartiment moteur et toucher le multimètre en haut de chaque fusible. Lorsque vous touchez le haut de chaque fusible, vous allez mettre le fil rouge sur l’une des bornes argentées d’un fusible et le fil noir sur l’autre. La plupart des fusibles devraient indiquer « 0,000 », mais vous pouvez en trouver 1 ou 2 qui indiquent autre chose que « 0,000 ». Notez ces fusibles et postez-les ici. Répétez l'opération pour la boîte à fusibles dans l'habitacle. Avec ces informations, je peux ensuite préciser quel est votre problème et ce qui tire le courant lorsque la voiture est éteinte.

 

Hi,
Thank you for your detailled answer. I’ll do that.

 

Thermo, very useful suggestion, in next days I will do this testing.
In last month I have a battery drain , I explain. As I use very seldom my 2,2 diesel X-type generally after one month of car parked I was able to start, after 6 weeks generally the battery was unable to start the engine ( a 90 Ah battery a couple of years old).
After a body shop repair with soldering the guy said the battery was dead and unable to recharge (but I sustect he tried to recharge with a booster, that is not correct).
So I bought a new battery, 80 Ah Magneti Marelli , but I discovered that after 10 days parked in my garage I found that the new battery was drained and unable to start.
As the new battery was in warranty and a bit smaller than the required ones I was able to change it with a 90Ah 800 pick current Magneti Marelli.
But I tried to discover something better and I made this testing.
If I connect tho 20 A DC in series to the minus pole (one lead to the minus of battery and the other to the minus wire going to ground) I saw that initially for less than a minute the current is something more than 1 Amp, that the inner lights turn off and the current drops to about 350 mA (0,35 A) , within 30 minutes drops to 300 mA and after 1 hour drops to 250 mA and probably stays stable to 250 mA. This is with rear boot internal lamp removed, both with alarm engaged or disengager, start key removed, radio down (is a double DIN radio touch, gps,Android ect.). Of course this current absorption is excessive and wrong because :
250 mA x 24 hours is 6 Ah , after 15 day the battery is fully discharged, this means that after a week probably (now it's new) the engine won't start.
I suspect that there is something that drains current even if the car is sleeping.
Of corse I understand the advice to remove fuses, in the motor box and in the driver box, one by one and check when the current absorption drops to a normal reading ( 50 or 100 mA) but this method is very long beacause every time it's necessary to wait that the absorption stabilize .
As such the metho suggested by Thermo is very interesting, in few words the trick is to misure the voltage drop of each fuse (i.e. if the inner resistance of a fuse is 1 ohm, 300 mA by 1 ohm means a voltage drop connenting to the two pins of that fuse would show 300 mV DC a voltage that can be measured with the meter (but my questio is if 1 ohm resistance is reasonable, I suspect it's too high).
Anyway I will try this method, I will post the results.
Any other suggestion or experience is welcome.

 

In addition to my previous post, I'm afraid that a 1 ohm resistance of a normal fuse. I measured a lot of them but resistance seems to be very low, not measurable with a normal multimeter. Probably it's necessary to use a milliohm meter that I don't have.

 

If it's passing current you can check the (milli)volt drop across it.