Re: [opendiag] problem...

Hi again,

My optoisolator is Sharp PC817,
There is a datasheet about it in:

http://ns10.sharp.co.jp/ecg/pc/pc817/pc817-fea.html

Could it be that this optoisolator is not good enough
for this use?

-Sami R

>From: Jeff Noxon <jeff-opendiag@...>
>Reply-To: opendiag@egroups.com
>To: opendiag@egroups.com
>Subject: Re: [opendiag] problem...
>Date: Sun, 27 Aug 2000 13:49:17 -0500
>
>On Sun, Aug 27, 2000 at 11:34:55AM +0000, Sami wrote:
> > I just made the adapter, but I cannot get it work well.
> > Firstly, my car (Passat 2.8 v6 30V) has only 3 pins
> > connected in the diagnostic connector (4,7 and 16),
> > so the L-line is missing. Should it be conected somewhere?
>
>No, the B5 Passat doesn't have an L line.
>
> > I use the Ross-tech's VAG-COM-
> > tool and I only randomly get something from the controller.
> > I use a Compac laptop and I read somewhere that some laptops
> > may not provide enough voltage to rs-232.
>
>I have never tried VAG-COM, but you can try this:
>
>Connect the adapter to your laptop. Connect a 12V battery (not your
>car) to the power/ground pins of the OBD-II side of the adapter.
>Run a program like Hyperterminal, with flow control disabled, full
>duplex, direct connect to com1, 19200 bps. Anything and everything
>you type should echo back to the screen. If not, something is wrong.
>Check 38400 bps also. If it misses or changes characters, your laptop
>may have insufficent voltage (check the +/- ranges with a volt/ohm meter),
>or your optoisolators may not have sufficent bandwidth.
>
>Regards,
>
>Jeff

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Received on Mon Aug 28 01:40:27 2000