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  1. #11
    Join Date
    Sep 2016
    Location
    Burnley
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    643

    Default Re: Broke down this morning ...

    It has been a while since I had one apart but IIRC:

    There are two DC motors, the connections are brought out so you should be able to make either motor rotate either way by connecting the correct wires on the connector to a 12 volt source. You can work out which connections by rotating the motor manually and measuring the voltage on the pins till you find the pair that are producing voltage.

    The other connections on the plug are Hall effect output so you should get pulses on them when the motors rotate.

    If you are back to the wall I will have look at it for you but I would rather not, it will take some time and I am busy. If you do bring it then clean it first.

  2. #12
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    Quote Originally Posted by Mjolinor View Post
    It has been a while since I had one apart but IIRC:

    There are two DC motors, the connections are brought out so you should be able to make either motor rotate either way by connecting the correct wires on the connector to a 12 volt source. You can work out which connections by rotating the motor manually and measuring the voltage on the pins till you find the pair that are producing voltage.

    The other connections on the plug are Hall effect output so you should get pulses on them when the motors rotate.

    If you are back to the wall I will have look at it for you but I would rather not, it will take some time and I am busy. If you do bring it then clean it first.
    Thanks John.
    My garage's problem apparently seems to be that my car seems reluctant to talk to STAR while it's showing the 3 lines on the dash

  3. #13
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    Well ...... 8 weeks to the day & I'm still Smart 451-less. First garage tried this & that a d after about a month I suggested I take it else where at which he jumped at the chance to let someone else look at it.
    It's is been at the 2nd garage (a Smart specialist with access to a shed full of dead & dying Smarts of various flavours) and he's replaced the fubar'd actutor but that didn't get it to start. Additionally he's "changed gearbox Sam unit gearbox Ecu Se drive and now seriously scratching my head"
    How hard can a car fight to stay dead? I want my car back on the road ☹☹

  4. #14
    Join Date
    Sep 2016
    Location
    Burnley
    Posts
    643

    Default Re: Broke down this morning ...

    Has it actually been connected to a Star diagnostic since the fault started?

  5. #15
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    Quote Originally Posted by Mjolinor View Post
    Has it actually been connected to a Star diagnostic since the fault started?
    Hi John.
    yes. By both garages. But they were both having problems communicating with something or other .... honestly not sure what.

  6. #16
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    apparently it does start, no idea what was done to make it start (i'll have to speak to them/him) .... but it won't engage gears.

  7. #17
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    I'd forgotten all about this .... http://www.thesmartclub.com/board/sh...-to-come/page2

    I'm undecided now with this car. Last time I spoke to the place it's at now (in Southport) he'd tried various & has/is running out of ideas.

    Any one have any suggestions of where to take it? AN Other Smart specialist? Merc/Smart dealer? If so Manchester? Liverpool? Or break it? It is after all an 11 yr old car, but it has/had plenty of 'extras' on it that others on eBay & Autotrader are lacking ie power steering, flappy paddles, centre exit exhaust, leather heated seats

  8. #18
    Join Date
    Sep 2016
    Location
    Burnley
    Posts
    643

    Default Re: Broke down this morning ...

    I would kill for power steering on mine.

    My next step would be to buzz out all of the CAN bus on the car, there are at least two of them and also LIN so lots of meter work but not hard to do. As well as checking for continuity you need to check for the correct resistances.

    I know I have the diagrams somewhere because I used it to buzz one out but I can't find them right now. I will continue looking but they must be on the net somewhere anyway.

  9. #19
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    178

    Default Re: Broke down this morning ...

    Quote Originally Posted by Mjolinor View Post
    I would kill for power steering on mine.

    My next step would be to buzz out all of the CAN bus on the car, there are at least two of them and also LIN so lots of meter work but not hard to do. As well as checking for continuity you need to check for the correct resistances.

    I know I have the diagrams somewhere because I used it to buzz one out but I can't find them right now. I will continue looking but they must be on the net somewhere anyway.
    I was amazed at how heavy the steering was on a Smart I test drove that didn't have assisted steering. As the Roadsters came with PAS I'd just assumed that all Smarts would have it, after all they're promoted as a city car.

    I can do electrics to a point, but CAN electrickery is beyond me.

  10. #20
    Join Date
    Sep 2016
    Location
    Burnley
    Posts
    643

    Default Re: Broke down this morning ...

    Quote Originally Posted by EmilysDad View Post
    I was amazed at how heavy the steering was on a Smart I test drove that didn't have assisted steering. As the Roadsters came with PAS I'd just assumed that all Smarts would have it, after all they're promoted as a city car.

    I can do electrics to a point, but CAN electrickery is beyond me.
    It is only a matter of checking continuity from the OBD plug to every electronic box for two wires (the green ones). After that measure the resistance between the pair of wires. It should be 60 ohms with everything plugged in but it should be 120 ohms if you unplug one of the end devices. << from memory so may need checking.

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