Further electric confusion

Discussion in 'E46 M3 (2001-2006)' started by lambert, Oct 28, 2018.

  1. 31 Oct 2018 at 10:26 AM #21
    E46CoupeM3

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    Key charges in use in the column and has a rechargeable battery inside
    You have to cut case open to swap but a long drive is a good cheap first attempt
    Also dona quick gooogle on fixing rechargeable batteries
    I have one in an old iPaq that needs the occasional jump if not used for years
     
  2. 20 Nov 2018 at 8:23 PM #22
    lambert

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    Hi guys

    I’ve been bashing my head with this one big time unfortunately. I’m still stuck in the same hole again even after many tests.

    Replaced the infamous heater hedgehog Saturday, 3 days later I’ve got a dead battery again. Although I left it 3 days untouched it should last longer then that.

    I’ve established,
    It’s not the alternator.
    I’ve pulled out the blue tooth.
    Done vigorous voltage tests
    Tried locking the car manually.
    Hedgehog replaced
    Hk turned off
    Monitor turned off

    Am I missing anything else guys?

    Any advice really is sincerely appreciated

    Lambert
     
  3. 20 Nov 2018 at 8:36 PM #23
    Coops

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    Hiya - when you say HK and Monitor turned off do you mean you pulled the fuse?
     
  4. 20 Nov 2018 at 8:44 PM #24
    lambert

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    Hi coops.

    Thanks for the reply. No I didn’t pull the fuse to the hk and screen just manually turned off as I’ve read online it helped in a few cases but sadly not mine.

    Lambert
     
  5. 20 Nov 2018 at 9:35 PM #25
    Josh0m3

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    Hi Lambert. I think it may be worth replacing your battery. I know you said it’s not all that old but seeing as your still having problems after fitting the new FSR, which seem to be commonly know to be a fault I’d bet it’d be the battery.

    Seriously hope you sort this. :thumbsup:
     
  6. 20 Nov 2018 at 11:21 PM #26
    Coops

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    Hiya - pull the fuse mate I tried switching it off etc and it made no difference! Remove the fuse and test that
     
  7. 21 Nov 2018 at 5:52 AM #27
    lambert

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    Hi coops, I’ll be back at the car this evening I’ll swap it for a better battery again with charge and take the fuse out this time.

    Number 41 you recommended? 30 amp?

    Many thanks again to all.

    Lambert
     
  8. 21 Nov 2018 at 6:13 AM #28
    Coops

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    Yep - fuse 41, 30amp. You will lose the stereo / head unit etc - likely candidate if this fixes it is the BM54 unit in the boot. You can get it upgraded to solve the problem by Baris at Carphonics on here! FWIW I replaced the head unit and did away with the BM54 to solve it but depends if you want to stay OEM. If you are getting it fixed (if it’s the problem) then. It’s worth considering some of the upgrades at the same time - again baris can advise. Good luck :)
     
  9. 21 Nov 2018 at 6:19 AM #29
    E46CoupeM3

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    Not seen any evidence you have taken some of the test techniques mentioned in previous thread such as how to insert ammeter without hard resetting car.
     
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  10. 26 Nov 2018 at 9:12 PM #30
    Coops

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    Aby update??
     
  11. 26 Nov 2018 at 10:15 PM #31
    lambert

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    Hi coops,

    Thanks so much for the msg.
    Same to everybody else also)

    Cars booked in at Bmw Saturday.

    They recommend battery and alternator needs testing, although both fairly new)

    I pulled fuse 41 and 7, left it. Battery drained, re installed and kept and eye on the satnav to make sure it was going to sleep upon locking car which it was.

    So that, along side our other tests eliminates most things.

    I have to say though very oddly. Every time the battery drains, so low (It won’t exempt to start, no starter clicking, I loose absolutely everything, all settings, time.. cars obc readings everything, all apart from my stereo settings..?!

    Surely that’s abit strange

    Lambert
     
  12. 26 Nov 2018 at 10:58 PM #32
    E46CoupeM3

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    So no, you have not Said you applied a sound measuring technique that would avoid a hard reset of the car
     
  13. 30 Nov 2018 at 6:31 PM #33
    lambert

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    Hello everybody,

    Quick update for those who payed an interest in my recent nightmare of power drains.

    Thanks for all your ideas and help so far.

    Cars currently in at bmw Cooper Ipswich (my local dealer) and also the garage the car was sold from back in 06.

    It’s been worked on by one of the master techs as most of the younger guys haven’t spent much time on E46s.

    So far, as I thort.. nothings flagged up. A few error codes were deleted which I do have a copy off, although Nothing really leaning towards the battery atall.

    He said the faults shown that his cleared looked like ghost ones because the battery’s been flat and jumped a couple of times. Although his going to look into a couple of them.

    I’ve left the car there over night, they’ve put it on a hard charge and I will pick it up in the morning.

    The chap let me in the workshop and we spoke about everything, he explained even their brand new batteries off the shelf aren’t fully 100% from new, A hard charge over night will rule out the battery for good.

    Got a ride back in a nice new cooper s mini which was fun, I’ll be sure to update with any further findings.

    Lambert
     
  14. 30 Nov 2018 at 7:52 PM #34
    lambert

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    Here’s the codes I have a copy off.

    000005 szm undervoltage seat heating
    00001E ihka auc heating
    000020 pdc acoustic generator,rear,off
    000022 Lsz2 headl.v.a.c load lense earth
    000042 buglar-al system pass-compart
    000050 mrs power supply
    000061 smg voltage supply
    000080 rls control unit
    000081 gmalarm mem driver doorcontac
    000087 kombi k bus
    0000F4 kombi no can identify
    005E16 abs dsc: can conec to inst cluste

    The drain from the car was 0.02 amps which is exactly what I originally tested on the fluke/multimeter.

    Anyone make sense of those? I’ve goggled a few but abit beyond me really.

    Lambert
     
  15. 2 Dec 2018 at 12:52 AM #35
    lambert

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    Hi all

    Cars back at home, picked it up earlier today with no charge which was very nice of the guys at coopers, however still non the wiser, they can’t find any faults regarding a drain with the car being left there over night hooked up to the machine there was no signs of the car awaking.

    The “ghost codes which were cleared have remained from reappearing.

    Let’s see how long she lasts, I have a funny feeling next weekend it may be back at the workshop but fingers crossed for now the battery charge has helped.

    Will update accordingly,

    Lambert
     
  16. 2 Dec 2018 at 5:27 PM #36
    mid lid

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    Get a new battery surely
     
  17. 2 Dec 2018 at 8:58 PM #37
    klan8456

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    Amazing, how did you get away with not being charged by the dealer? I was sitting here expecting you to get a 1k+ bill and no resolution.
     
  18. 2 Dec 2018 at 9:30 PM #38
    lambert

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    Hi guys, hope you’ve had a good weekend.

    Midlid, I don’t think it’s the battery, as it’s only about 5 weeks old.

    Bmw have checked this also and charged it up too 100 percent. When I arrived there with the car it was at 82 percent.

    Klan, Ill admit I did half expected some kind of diag bill and had money aside for this but to be fair I bought the battery from them so it’s probably right in fairness to offer the front of it.

    She also had a free health check. Nothing to report, found surface rust on rear springs.

    (The cars been there loads in its life for mechanical work so I guess they won’t want to right there own work off as such)

    However, as I previously said I have no doubt it will be back there very soon unfortunately so I dare say there going to have me over a barrell on next visit.

    I’ve parked her up for the week. Let’s see if she lasts.

    Thanks all

    Lambert
     
  19. 6 Dec 2018 at 7:40 PM #39
    lambert

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    Hi guys, i managed to get over to the car this evening low and behold it’s so dead I have nothing. No dash lights no central locking.

    The saga continues unfortunately

    Lambert
     
  20. 6 Dec 2018 at 8:09 PM #40
    lupouser

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    I'm going to take a bit of a wild guess here and say the GM5 module.

    It would tie back to you having problems with the keyfob as well (as mentioned in your first post).
     

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