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  1. #11

    Default Re: Gear Indicator showing 0

    Is the car facing up or downhill? If the box was left in gear and the car crept foward or back, it can put enough stress on the transmission that the shift motor is unable to move the selectors. In this case you need to physically move the car in the other direction to release the pressure on the transmission.

  2. #12

    Default Re: Gear Indicator showing 0

    Car is in the garage on the flat. I don't think it has a gear engaged. Will try rocking back and forth once I have got it back together. Thanks.

  3. #13

    Default Re: Gear Indicator showing 0

    Hi.

    Tried everything I can think of and gear display still showing zero.
    • Brake switch tested electrically - all OK
    • All gearbox sensors unplugged, cleaned and put back in
    • Gear motor and position sensor removed and refitted
    • Tried putting into gear and pushing back / forward (no gear engaged so just rolls nicely)
    • Checked wires for chaffing - all good
    • Checked gear box connectors - all good
    • Tried leaving ignition on for 30 seconds before re-starting
    • Tried disconnecting the battery overnight
    • Lubed the gear actuator
    • Checked all fuses
    All other ideas welcome!
    Anyone know of a mobile mechanic with a Smart car fault reader near Bedford that could run a diagnostics?
    (Fudgesmart is the nearest I can find and he is 50 miles away)
    Thanks for all the advice so far.

  4. #14
    Join Date
    Feb 2006
    Location
    Hampshire
    Posts
    1,113

    Default Re: Gear Indicator showing 0

    For the sake of 7 I'd just change the brake switch - to rule it out...
    The number of times I have read that people have "tested the switch - it's fine" only to find out it was the culprit all along....

  5. #15

    Default Re: Gear Indicator showing 0

    Thanks
    Having tested the switch and taken apart to see what joins to what I wired direct between the 2 terminals on the plug to make sure, and still no go.
    You are right, for 7 will give it a go but 99% sure its not that.

  6. #16
    Join Date
    Jun 2005
    Location
    Aberdeenshire
    Posts
    2,098

    Default Re: Gear Indicator showing 0

    Switch costs nearly 30 with cover. At least 20 without.

  7. #17
    Join Date
    Jul 2005
    Location
    over here
    Posts
    13,867

    Default Re: Gear Indicator showing 0

    Quote Originally Posted by Tolsen
    at least 20

    No



    https://www.ebay.co.uk/itm/SMART-CAR...frcectupt=true


    and it's more than likely this non-branded one for 7 can be made to fit too:


    https://www.ebay.co.uk/itm/Febi-Brak....c100005.m1851
    fq101.co.uk

  8. #18

    Default Re: Gear Indicator showing 0

    Update:
    Spent a couple of hours with a mobile diagnostics man with a MBStar.
    Only test that it failed was the clutch drag point (Drag Point of Clutch Not Successful.)
    Could it be that the clutch is stuck open?

    We were able to check that the gear lever positions were being seen by the ECU.
    Gears were all able to be selected by the MB Star via the ECU.
    Clutch actuator test was carried out. (Plunger was seen moving in and out)
    Gear position reset was successful, but did make quite a lot of clattering noises when it did it.
    Only thing that didn't work was the clutch drag point. No drop in engine revs.

    What would normally cause this? Clutch fork arm thingy stuck? Thrust bearing shot? All ideas welcome before I start ripping into the clutch housing. Thanks

  9. #19
    Join Date
    Jul 2005
    Location
    over here
    Posts
    13,867

    Default Re: Gear Indicator showing 0

    How old is this 450 ??
    fq101.co.uk

  10. #20

    Default Re: Gear Indicator showing 0

    53 plate so 2003/4 makes it 16 years old.

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