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Thread: 2004 E85 top flashing red

  1. #1
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    2004 E85 top flashing red

    Just replaced my top canvas. While stripping out old and moving top back and forth to get access got the red flashing light.
    It was early on in fitting so I'm assuming I've dislodged something near header.

    As of now.. new top fitted but only have manual operation. Red light flashing continously and no operation when button pressed (no window movements etc. )

    Where is sensor in header? And how to access to check? Or can it be confirmed somewhere else with meter?

  2. #2
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    If it worked before you started, it's likely the switch for the adjustable tray that holds the top when it's down. The switch is accessed through the trunk. It's in the center of the panel at the front of the trunk. The tray actuates the switch if the tray isn't in the lower position. I'd start with that.

    Sent from my S48c using Tapatalk

  3. #3
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    Shelf is still out but had someone hold switch (audible click) so likely not it. But will take it out tomorrow and jump it to confirm.

    I think I was still letting liner go and window trim when I got the flashing red and everything stopped. Not to trunk at that point and didn't have aluminum frame unbolted.

  4. #4
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    Ok, that's all I can think of for now. It's been 3 years since I did mine.

    Sent from my S48c using Tapatalk

  5. #5
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    Here is wiring for roof: https://www.realoem.com/bmw/enUS/sho...diagId=61_1638

    There is a cable wire that end's near the header. Since you believe it involves the header area this is where I would search. If you reinstalled the liner, you may have to pull it again.

  6. #6
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    Wiring... that's exactly what I was looking for. Thanks.
    Removing liner is minor... trying to avoid pulling entire top right now. I've contorted enough in that trunk for this week.

  7. #7
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  8. #8
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    Muzz Thanks for info. First link is for e89. Second (Pelicanparts) has comment with similar symptoms. But only says to scan to see what sensor is not working.

    Couple questions... in header there is a hall sensor to confirm position of "locks". How do you get access to that one to check position? And is there only one on driver side or two... one on each side.
    Or can I unplug it, move locks and meter it?

    Two sensors by door frame... easily see one with top open. Is second one just below it? (Still trying to avoid pulling top. Lol)

    Also, is there a way to clear faults in module without scan tool? I'm wondering if I've just messed up sequence while moving top back and forth working on it?

    Have liner peeled back and no further ahead.

  9. #9
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    Just add. I think it thinks top is in closed position... even when stowed and locked open (100%manually) if I open and close door window makes slight down with open door and up when closing door. I don't believe it does that with top down normally.

    Plus key fob lock starts sequence to close windows or open when button held. So I assume car knows position of windows at all times.

  10. #10
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    Can't help with header sensor's info.

    Here is location of second sensor on lifter (follow posting down and you will see pic's) https://z4-forum.com/forum/viewtopic.php?f=3&t=124374

    This is your call, you could try disconnecting battery for a time to sort of reset roof computer (not sure if that's correct name for it) If you do Battery disconnect, after reconnecting battery remember to reset windows before trying roof.

  11. #11
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    Sounds like it is time to equip yourself with a good scanner with BMW software. Scan the soft top module and see what is wrong via the trouble codes and digital inputs etc.

    INPA or BMW Standard Tools
    https://www.bimmerforums.com/forum/s...xperimentation
    https://www.e46fanatics.com/threads/...tools.1274003/

    Foxwell NT530 scanner with BMW software
    https://www.foxwelltool.com/wholesal...installed.html
    2000 2.0L Z3 Roadster, Mora Red, Individual, Originally from UK, daily drive.
    2000 3.0L Z3 Roadster, Siena Red, BMW Development car, Originally from Germany, Garage Queen
    2000 323i E46
    There is only one thing more pleasurable than working on a Z3, that's driving it top down on a fine day.

  12. #12
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    Managed to see both sensors at door frame (look ok)

    Giving up for now. Ordering a scan tool.

    Still open to suggestions.

  13. #13
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    The controller for the convertible top is in a white plastic box behind the driver seat. You'll have to remove the plastic wall covering by removing 4 screws around the speaker. Once you've done that you will be able to reach the white plastic convertible top controller. The sensor's (all of them) harness run into this box. Maybe your adjusting the old/new top somehow pulled the harness plug out of this white box. Although it most likely isn't this, it can hurt to rule it out.

    I'm going to strongly suggest you cross post this problem on the UK Z4 forum. I believe the one member is an actual BMW tech (not 100% sure on this). However, I'm aware he's solved some tuff roof problems. This persons on line name is "number5".

    Here is the link for this forum: https://z4-forum.com/forum/index.php

  14. #14
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    Foxwell scanner showed up today...
    Top is Showing codes...
    22 CVM Switch, cowl panel unlocked short circuit to ground

    42 CVM Drive, cowl panel short circuit to positive.


    So, looks like wiring problems. Hopefully will get time tomorrow to start looking... any suggestions on where to start?

  15. #15
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    You did the change out without disconnecting the battery. Your first step should be checking all fuses.

  16. #16
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    Yeah, checked fuses. Will confirm tomorrow again, but were ok

    Quickly looked around tonight and "42" reset. (intermittent???) Only showing code 22 now.

  17. #17
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    As I'm sure you already did, googling that code did not result in an exact match. However, everything in the same ballpark which did pop up dealt with convertible tops, mostly Z4's. These codes also dealt with broken wire's in the convertible top's wiring harness to the front motor/locking/unlocking system.

    Based on these similar code results, I'm guessing a break in the wiring. If so, I'm hoping the break can be traced without issue.

    Yea, a blown fuses would have been easier

  18. #18
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    Have I mentioned how much I hate tracing electrical problems....

    Stripped everything back and can't see anything. (Looking for a wiring diagram to match plugs to test continuity right now... ie... wire color on cmv plug to wire color on plug at top)
    Codes are still 22 and 42.

    Live data ... only thing I can see is " convertible top catch" shows implausible when I manually operate the locks. (Goes from open to implausible).

    How do you get access to that sensor on the lock? Is there a way to jump it out on plug at right point to prove that is the problem? Before take everything apart again.

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