Parasitic Battery Drain e53

[andrewwynn]

It has to be related to motion sensor buy the sensor itself is going to be a few mA. It's kicking on other systems.

Does you DMM have averaging like mine? You can leave it overnight and measure the average draw over a range of hours and know if there is any concern of that motion sensor kicking on by itself.

Are you locking the car in this case? I was under the impression the motion sensor only turned on with the alarm but that does not seem to be the case.

FYI don't lock car from outside with your kid inside and go inisde a store. He won't be happy if he doesn't remain perfectly still.

[Fifty150hs]

Originally Posted by andrewwynn

It has to be related to motion sensor buy the sensor itself is going to be a few mA. It's kicking on other systems.

Does you DMM have averaging like mine? You can leave it overnight and measure the average draw over a range of hours and know if there is any concern of that motion sensor kicking on by itself.

Are you locking the car in this case? I was under the impression the motion sensor only turned on with the alarm but that does not seem to be the case.

FYI don't lock car from outside with your kid inside and go inisde a store. He won't be happy if he doesn't remain perfectly still.

You can lock him in and make it so he can move. Hit the lock button on the key a second time within ten seconds. It disables the motion sensor. I use it regularly when I have my dogs with me.

[andrewwynn]

I know that trick but I have him lock from inside so he can exit at will. I just forgot once and instinctively locked as I walked away oops.

He of course called me two minutes later with the alarm going off


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[Fifty150hs]

Originally Posted by andrewwynn

I know that trick but I have him lock from inside so he can exit at will. I just forgot once and instinctively locked as I walked away oops.

He of course called me two minutes later with the alarm going off


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oops

[Bmwe5320023.0]

I dont know why, but even if I double locked the vehicle and made any movement inside, as much as sticking my hand through the window, the motion sensor would sense it and create a draw by waking up the systems I described earlier.

I disconnected the motion sensor and the problem is gone.

When car goes to sleep, draw is 70 mA

[X5chemist]

Out of curiosity while installing recording camera power, I remembered this post. I disconnected the motion sensor. Well, my shift indicator lights work again. They didn't work until I put it gear. Now, P and all the others work when the X5 is on. After shutting off, the P light is not on even though it's not asleep. I need to do more troubleshooting.

[andrewwynn]

Not aware of P supposed to be lit once car is off sounds like normal behaviour

[workingonit]

Originally Posted by andrewwynn

Not aware of P supposed to be lit once car is off sounds like normal behaviour

On my X5, I've used the "P" light as the indicator of whether sleep mode is in effect; if I see it's still lit after 16 minutes, then there's a door ajar somewhere, or something else amiss. It's helped me find a couple of live circuits (added by me) that I forgot to turn off.

[X5chemist]

Yup, mine does stay on after after shutting everything down. For some reason, it's not working right now. After disconnecting the motion sensor, the P light comes on with key in accessory or run mode. The only way I know it's still awake is by driver side door window switch. The rear window green light lock out button stays on when pressed. Even after 16 min, the light is still on.

[andrewwynn]

Sounds like odd behavior. Like not sleeping I'm surprised about the child lock light. I'll check what my car does next time im in the same zip code.


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