P38 2.5DT Flat Battery

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janel

New Member
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2
Hi
I'm completely new to forums and a complete girl as far as anything mechanical is concerned, however, I thought I'd check out google for any information on flat batteries in Range Rovers, and found this great site. I've had our RR for about 5 years, and had very few problems until the last 5 or so months when a "LHF Door Open" message on appeared on the dash. Although this was annoying I ignored it and tried to make sure that I always switched off the interior light manually. About the same time I had quite a lot of instances of not starting, and having to jump start it. A new battery seemed to fix the problem for a while, but now it has started again. Could these be related? In addition, I've also read with interest many of the posts re the RF receiver. If this is not too blonde a question.... would the BECM wake up if the car is not locked? I can easily put the car in a shed on the farm and leave it unlocked to see if that makes a difference, but just wondered whether the sensor saying the door is open would have any effect on draining the battery?
If anyone has any useful hints or tips I'd be most grateful.
 
Hi
I'm completely new to forums and a complete girl as far as anything mechanical is concerned, however, I thought I'd check out google for any information on flat batteries in Range Rovers, and found this great site. I've had our RR for about 5 years, and had very few problems until the last 5 or so months when a "LHF Door Open" message on appeared on the dash. Although this was annoying I ignored it and tried to make sure that I always switched off the interior light manually. About the same time I had quite a lot of instances of not starting, and having to jump start it. A new battery seemed to fix the problem for a while, but now it has started again. Could these be related? In addition, I've also read with interest many of the posts re the RF receiver. If this is not too blonde a question.... would the BECM wake up if the car is not locked? I can easily put the car in a shed on the farm and leave it unlocked to see if that makes a difference, but just wondered whether the sensor saying the door is open would have any effect on draining the battery?
If anyone has any useful hints or tips I'd be most grateful.

Not sure if that would solve, as mine locks itself after about 4 mins or so if i leave unlocked, hence-dont leave keys in. If yours does same as mine, then it would lock itself & then the fault would be draining the battery. Prob a good idea to try & have it read for any faults..?
 
Could be if it thinks the door is open the cars alarm won't go to sleep properly, but if it's been registering the door open for a while and the battery has only just started draining then it probably isn't that.
The common fault is the BECM doesn't go to sleep properly or out of sync and therefore pics up all the other infra-red signals whizzing about and that stops it sleeping properly. I parked my dads in the middle of the country over night as it used to drain each night, and it stopped doing it when it wasn't in a built up area.

That's how I understood it anyway. Someone feel free to correct me if I'm wrong
 
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