Bad few days!!!

[Kerryx5]

Full shut down on the car and I'm getting a reading of 20mA.

Think I have found the route of my problem!

The compartment where the nav drive is contained has some liquid in the bottom. Some of the wires are damp.

I've had the meter on for 2 hours and randomly on 5 occasions the car has woke up. Sat nav booted and then powered back down.

I have now unplugged every thing in that compartment and no more waking.

System has been in shut down for over an hour now.

I hope that this is it! Any suggestions?

[Kerryx5]

Turns out its the NAV drive causing the battery drain.

I have read this on a few different forums. Any one else had this problem??

Kerry

[jaynana]

[quote=""Kerryx5""]Turns out its the NAV drive causing the battery drain.

I have read this on a few different forums. Any one else had this problem??

Kerry[/quote]

eh?? ok that bothers me! a few posts down i wrote '(including in my case the nav dvd player - for what reason that comes up i don't know but the red light starts blinking)'.

what exactly do you observe?

i'm gonna keep the panel open to see if it really stays asleep or whether it keeps wakin up in its sleep!

[Kerryx5]

I sat watching the car for 2 hours. NAV drive randomly turns on then goes off. It did this 5 times in one hour. I unplugged all electronics 2 nights ago and all was fine.

Last night I plugged everything back in and sure thing the nav drive started its cycle again.

I left the drive itself unplugged last night and went to the car this morning and all way fine.

The drive when powering up brings the car out of sleep mode continuosly. Last night it stayed in sleep mode every time i checked it.

I was checking the car every 20 minutes or so.

The power drain with the nav drive plugged in was 2.2A which would explain why the battery was draining over night.

Kerry

[X5Sport]

Definitely sounds like you've found it, but I'm intrigued that it was waking the whole car up again. One other check to make is to see if the LED on the gearshift comes on, or stays out too. It's a 'tell-tale' and goes out once the car is asleep. If it's coming back on with the DVD drive disconnected then something is waking the car. The Nav drive will auto-start as part of the wake up.

It probably is the damp allowing a short that woke everything.

[Kerryx5]

Car stays in sleep mode with the drive disconnected. LED on gearshift is off all night now!

[jaynana]

[quote=""Kerryx5""]Car stays in sleep mode with the drive disconnected. LED on gearshift is off all night now!

[/quote]

thanks

i've kept the panel open. 2 hrs since i last drove and i looked through teh rear window and the satnav is asleep! phew having said that i've noticed everytime i lock the car and walk away the satnav light is either blinking or steadily lit. so maybe its a light sleeper..

i will keep an eye on this..

[jaynana]

[quote=""jaynana""][quote=""Kerryx5""]Car stays in sleep mode with the drive disconnected. LED on gearshift is off all night now!

[/quote][/quote]

Kerry, i'm not sure how this helps, but sharing something ive learnt - pls see below, there's a HUGE communication layer in these highly complex machines, which is way beyond just providing a voltage on a line for a unit to wake up! these beasts operate in a s/w driven digital electronics world, not analogue electronics!

http://www.e38.org/bussystem.pdf

so your nav module waking up in its sleep could be a fault of the nav module or even somebody in the network sending some bogus msg which gets interpreted wrong? bmw obviously has equipment to test each of these units by just tapping into the serial bus network. there's also other 3rd party crack s/w which does diagnostics on these networks..

[Kerryx5]

I don't doubt that at all!

All I know is that I've had the nav drive unplugged for 3 days now and all is fine!

Kerry

[Rusty]

Well done on finding the fault, I really hope for your sake that that is the problem, and your troubles are over.
Will you replace the Nav or go for a hooligan unit?


Sent from my iPod device using Tapatalk

[Kerryx5]

Gonna move on to an aftermarket headunit i think.

Been looking at http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 97.c0.m619

Seems like a sensible move as the drives are extortionate.

Kerry

[jaynana]

check this thead: viewtopic.php?f=8&t=1813

Dynavin or Hualingan are the popular choices.