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Thread: Roof codes confusing me

  1. #1
    Join Date
    Apr 2020
    Location
    Aldwick uk
    Posts
    2
    My Cars
    BMW e46 325 ci

    Roof codes confusing me

    Have a set of codes from my convertible e46 msport roof module (CVM) used inpa software to retrieve them.

    0x000012
    0x000013
    0x000017
    0x00001E
    0x00001A
    0x000023
    0x000024
    0x000025
    0x000027
    0x00002F

    These codes are all from the CVM

    The roof button is flashing constant red and if I time it right I can eventually get the roof down but it's in stop and starts and the same with closing the roof.

    Hope someone can steer me in the right direction. Thank you.

  2. #2
    Join Date
    Jul 2007
    Location
    Oldham UK
    Posts
    2,817
    My Cars
    '00 330i Sprt '92 525i
    Don't have a convertible but from my fault code list:

    12 Open control button permanently active
    13 Close control button permanently active
    17 Position switch for main pillar, short circuit to ground
    1E Switch, cowl locked, voltage undefined
    1A Switch, convertible-top comp. lid, voltage > 2.5V
    23 Switch, convertible-top comp. lid, right, locked, voltage > 2.5V
    24 Switch, convertible-top comp. lid, right, locked, voltage undefined
    25 Switch, convertible-top comp. lid, right, locked, short to ground or open circuit
    27 Switch, convertible-top comp. lid, left, locked, voltage undefined
    2F Switch, hard top, voltage > 2.5V

    Link to CVM manual:
    https://www.bimmerforums.co.uk/attac...ual-pdf.20920/

    HTH

  3. #3
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    5,122
    My Cars
    2001 525it
    The faults are only trail markers to lead you in a certain direction for repairs, certain problems could set many faults as in the top system there are many micro switches for instance that need to work correctly before the top operates or a broken wiring harness on the left side of the top frame. But some faults like coolant temp to low could mean the thermostat is bad. In your case the top is a bit more involved than that

  4. #4
    Join Date
    Dec 2008
    Location
    Greenville, NC
    Posts
    1,032
    My Cars
    99 740iL, 01 330 CiC
    I'd say #1 is to check out the wiring that runs along the left side of the top frame at the first bend.

  5. #5
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    5,122
    My Cars
    2001 525it
    Yup

  6. #6
    Join Date
    Apr 2020
    Location
    Aldwick uk
    Posts
    2
    My Cars
    BMW e46 325 ci
    Well I've checked all wiring and contacts and continuity of wires with a meter.

    Read through the e46 roof manual and test at the end.

    Still no further on.

    The switch is flashing like the roofs not locked in position and I can eventually get the roof down stop starting it which I shouldn't be able todo if there is a fault somewhere. The manual says it will complete an operation if a fault occurs then stop to prevent further damge. So I shouldn't be able to get the roof down at all.

    Looks like I will be off to BMW after lockdown. Which grinds so bad because the nearest dealer is the same dealer that knocked the car off the ramp a few years ago.

    Let's hope they are more careful.

  7. #7
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,153
    My Cars
    EXOTICS
    I would replace the button/switch first,
    Have you shorted it by maybe spilling something on it?
    Last edited by MIKYZZ4; 04-10-2020 at 07:37 PM.

  8. #8
    Join Date
    Mar 2007
    Location
    cowichan bay, bc, canada
    Posts
    857
    My Cars
    06 330ci zhp convertible
    And reset the trunk convertible top compartment.

  9. #9
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    5,122
    My Cars
    2001 525it
    Also check the wiring going into the the trunk lid

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