F11 Electrical/Comfort Access Glitch

Discussion in '5 Series' started by Peter, Aug 12, 2015.

  1. Peter
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    Peter WARLORD Site Supporter

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    I'm in the middle of a strange glitch involving Comfort Access.

    I hadn't used the car since last Thursday, (away in the X3) opened it yesterday to do a simple dash clean. Hadn't done any more than unlock the car, but within a minute or so, get a display stating high battery discharge and it is switching down consumers. OK, get the smart charger out and leave it charging for about 8 hours. Car won't lock up without opening and closing all the doors, but won't go to sleep without unlocking and locking it all again. So decide to take it for a run and get a bit more charge and hope it sorts itself.

    When I get back the car won't lock from the driver's side, but does from the passenger side. This itself poses some questions, is there a fault that's draining the battery? Or was it the battery causing the strange behaviour?

    Going out this morning, as soon as I got close to the car it unlocked without me even touching a door handle and started clicking from the two driver side doors. Strange. I get in, shut the door and the clicking stops, but I get a warning that the remote is missing.

    Is it car battery issues, remote/battery issues, or worse? I change the remote battery, fob still not recognised and won't start the car from the steering contact position. I get the second remote and try again, same issue, not recognised. I lock the car go round to the passenger side to see if the car unlocks without contact, it doesn't, so I unlock as normal, put the fob in the car, go around to the driver side get in, car starts as normal and off I go.

    I plug a voltmeter in the 12v outlet and monitor the voltage as I drive. Clearly the voltage is low, doesn't get much above 13v after 12 miles, only running 14.4V on the overrun when the alternator fully kicks in.

    After my first stop, and the same unlocking without touching the door handle, the car will only start from the steering contact position. Next time I stop, I lock from the passenger side and when I get back to the car it unlocks with the 'clicking' sound but engine starts as normal. No messages. Trip home voltage improves, got to 13.7v on the run and 14.6v on the overrun.

    So when I get home I tried the locking from the driver's side, immediately unlocks itself. Lock from the passenger side and it stays locked and car goes to sleep. BTW, the car 'auto locks' and unlocks when driving, so all door actuators are working, both from the remote and the car systems when driving.

    Still not sure if it is a transmitter problem/malfunction in one of the doors, reading the fob "to unlock" even without contact and/or draining the car's battery.

    I'm off to Inverness tomorrow (170 miles) so will use my 'get around', to save the messing and a chance to get more charge in the battery, see if the issues clear.

    A strange set of issues and not yet knowing whether the Comfort Access is "cause or effect". Or whether the warranty will need to come into play.

    Peter
     
  2. Spuffington
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    Spuffington Moderator WARLORD Site Supporter

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    No ideas other than pure guess work, but I wonder if it's the battery which is causing these gremlins? I had similar scenarios with my original E70 (message-wise) and funny issues with Comfort Access being hit & miss in the 550i before having the battery replaced.
     
  3. E39mad
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    E39mad

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    Presume the battery is original Peter?
     
  4. Peter
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    Peter WARLORD Site Supporter

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    Yes, it is the original battery. I'm hoping it isn't the battery, but am prepared for the fact it could be on its way out. The fact the car only did 6k miles in the first year and I'm under 8k miles a year won't help. The infamous "Driver Profile" could be involved.

    I'll see if tomorrow's use changes the way it locks up.

    Peter
     
  5. kleynie
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    kleynie WARLORD Site Supporter

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    Surely the battery should last longer than that? I sold my E61 with the original battery at 7 years old, still going strong.
     
  6. E39mad
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    E39mad

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    Depends - long periods on none use or very short journeys particularly in the winter can damage a battery. I know as I had two in my E39 touring and as soon as they start going low they throw up all sorts of electrical clitches
     
  7. Peter
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    Peter WARLORD Site Supporter

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    Problem I understand with AGM batteries, they can fail prematurely if the user profile doesn't suit the fact they are not completely charged. Saying that, I do hope for a bit more from my battery.

    My 330d still had the original battery at 6 1/2 years. I recall getting over 8-years from a Varta in one of my BMWs.

    Peter
     
  8. verysideways
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    verysideways

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    It does sound like battery rather than car or keyfob, but the simple solution would be to take it to your local battery vendor and get them to do a drop test on the battery and see if it's still performing correctly.
    Should not have discharged so much in those few short days when you were away to cause these sorts of issues...
     
  9. snrbrtsn
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    snrbrtsn WARLORD Site Supporter

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    Hey Peter, glad to see you here
    I know with my lack of use, sometimes three weeks at a time, I get the high rate discharge warning normally at this time of year as overnight temps drop.
    I thought the worst initially then thought, try to recondition the battery, that's when I got the CTek smart charger, left it on for circa 40 hours and the warning has yet to appear
    Think mine is the Mxs 5.0 or 7.0

    I don't think conventional chargers or normal running offer the same charge cycle of reconditioning
     
  10. Peter
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    Peter WARLORD Site Supporter

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    This morning, unlocked the car and went to start and got the "battery discharging while stationary" warning.

    "Remote missing or faulty" was intermittent, as was "remote not recognised" but car started all the same on a second attempt on the start button. Battery appears to be charging OK, but driver's side unlocking continues as before, all by itself, as soon as the fob is in range.

    It seems the O/S rear door has the issues, as the car won't even attempt to lock from that door. Open the rear door and all the clicking stops when the fob is in range.

    Call to the garage is the next move.

    Peter
     
  11. Spuffington
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    Spuffington Moderator WARLORD Site Supporter

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    Definitely give the garage a call, but what about BMW Emergency Services? I know you're remote, Peter, but sometimes worth giving them a call as they've come out to us for a variety of reasons and, most of the time, have either fixed or diagnosed at the house.

    That said, I know you've mentioned difficulties with hire cars etc. which your location brings, so I won't hold my breath. But anything is worth giving a go rather than the huge journey you have to endure to get to Grassicks.
     
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  12. Peter
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    Peter WARLORD Site Supporter

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    Good thinking Duncan, will see how the car is in the morning, as after a bit of fiddling with the faulty door handle it locked correctly, (once). I'll check out the battery compartment for any signs of water ingress, before I go calling anyone.

    The problem up here, there is no BMW Emergency service vehicle, so BMW ES takes you to a non BMW recovery service. Still may be worth a call to BMW ES if the battery is draining, as there is the possibility it will 'mess up', leave me abandoned, if I don't go putting it on charge. Must remember.... "I know nothing".;) :rolleyes:

    Peter
     
  13. slim_boy_fat
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    slim_boy_fat WARLORD Site Supporter

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    That's important, Peter. There's an old saying "Kid on yer feel and ye get a hurl for nothing"......;) :D
     
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  14. Peter
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    Peter WARLORD Site Supporter

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    Will be hard to hold back... All over the place this morning with battery drain and consumers switched off. Had to put the fob against the steering column to get started. Checked the obvious, no water in the under floor wells, all dry, clean and tidy. :)

    Time to get the 'experts' involved.;)

    Peter
     
  15. Spuffington
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    Spuffington Moderator WARLORD Site Supporter

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    Best of luck with it, Peter.

    I fear it'll be a case of the battery playing up. Let's hope that's all it is, in spite of the substantial cost involved.
     
  16. E39mad
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    E39mad

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    Do new batteries have to be coded in the F10/11's?
     
  17. Peter
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    Peter WARLORD Site Supporter

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    Even when the battery is stable and reading >12.6v the comfort access is still faulting the same way.

    Been on the phone to BMW ES and the garage, the result is a decision to recover the car. BMW looked to see if anyone local could diagnose the problem, but only one guy in their loop has diagnostics which may or may not be up to the job, no guarantees, so not really any advantage.

    Recovery is being sorted, as is a hire car. I despair with sorting the hire car as we spend a lot of time going round in circles getting no where. I hope this time is different, but not so sure from initial phone conversations.

    Peter
     
  18. Peter
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    Peter WARLORD Site Supporter

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    535i was uplifted early this morning, garage is set to look at it Monday. Eventually got a hire car sorted late this morning. Required picking it up, to get it today. :(

    Dealing with all the different companies involved, makes for a spread of experience and varied opinion on owning a BMW, something I'll expand on when I write up the 535i review at 3-years.

    Now driving a VW Golf TDI Bluemotion. What shall I say... "a competent little car", but not inspiring in any way whatsoever.

    Peter
     
  19. Merc? No. BM!
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    Merc? No. BM! WARLORD Site Supporter

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    Let's hope they will sort your car's problem(s) out positively Peter, or we might loose you to the dark side perhaps...;)
     
  20. Peter
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    Peter WARLORD Site Supporter

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    In an ideal world I'd like a car that is looked after at a garage/dealer just a few miles from home, But that won't happen unless I want to drive a Ford. :eek: All the decent options are 60 or more miles away. I guess when things go wrong, other marques will be much the same, as they out source their emergency service support to a mix of companies. Even being under the BMW 'umbrella', you get passed from pillar to post, give your details over and over again, (that's where time is wasted and you lose the communication chain), it is not a 'one stop' support.

    Peter
     

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