Thread: Mysterious flat batteries

What about using a clamp meter to check the battery current drain while the vehicle is parked & then refer this to LR specs if they can be got hold of.
Check & log current at different times & when parked different places .May give a clue as to what is going on.

I am with Dave all this fangdangled new stuff is fine while it works,but when it plays up,it can be a nightmare for all involved.

Originally Posted by Blknight.aus

I didnt think the bluetooth systems had the authority to keep the system alive after the ignition shutdown had been given

Hence my question about asking if the owner locks the car overnight. If not it may stay awake thinking the owner is returning. Locking the car shuts it all down. I assume the LR service guys would have locked it so it could be the reason and an easy fix.

Hi Dave and if my RR is locked, my Bluetooth still remains active until I move far enough away for the connection to sever or after a given amount of time.

But if I don’t lock it, the Bluetooth remains active and I can’t use my phone if I’m less than 25 to 30 metres from the RR and this peeves me no end.

In the case of the D4, if the customers phone was the problem, I would imagine backing the D4 in would not change anything.

When the VE commodore was first released, the automatic light sensing headlights would stay turned on, even after the car is locked from the remote, for about 10 minutes. if it recieves a change in light level in this 10 minutes, it stays awake for a further 10 minutes, keeping the BCM awake. things like flickering fluro lights were keeping BCM's awake and flattening batteries overnight, even after being locked properly.

maybe start pulling individual fuses out over night, and see which fuse in causes the flat battery and take it from there?

I think I'm with Dave on this, Smart meters emit 900MHz and 2.4 GHz radio frequencies (I think key works on 433MHz so maybe not to do with the key freq). I reckon nose in, the signal is strong enough to to get to what ever part of the car is sensitive to it.

I read a thread on a forum a few years ago. It was a P38 that was having flat battery problems. it turned out to be caused by the body ecu would go to sleep as it should, then later it would wake up for no aparent reason. The cause was traced to a house a couple of doors away. It had a monitered alarm system that had a faulty back up battery. The alarm was sending out a signal to some where to alert this fact. This signal was waking up the ecu. When a new battery was fitted to the alarm, the P38's problem was fixed.

Dave.

The bluetooth light on my D4 only stays on after the engine is stopped if a call is in progress, otherwise the phone's bluetooth connection is dropped immediately, as indicated on my phone. However my vehicle only has the base audio and display which uses different bluetooth hardware to vehicles with touch screens, at least for the MY10 vehicles.

Originally Posted by drivesafe

Hi Dave and if my RR is locked, my Bluetooth still remains active until I move far enough away for the connection to sever or after a given amount of time.

But if I don’t lock it, the Bluetooth remains active and I can’t use my phone if I’m less than 25 to 30 metres from the RR and this peeves me no end.

In the case of the D4, if the customers phone was the problem, I would imagine backing the D4 in would not change anything.

so, no, the bluetooth does not have the authority to keep the system awake if locking the vehicle disables it.

my next question would be "are they locking the car in the garage?" if not and somethings sending the handshake request procedure for bluetooth (the neighbours xbox/playstation/router is searching for controllers, the smart meter, some solar installation inverters) that'd be keeping the bluetooth awake which may be preventing everything else from going to sleep.