RE: [opendiag] Re: Bosch EDC15/ Suzuki Grand Vitara HDI

I'm using an Elmscan ISO interface to talk to an EDC15 on a Vauxhall X22DTH
engine (1999 vintage). The OBDII diagnostic plug doesn't have an
L-connection, but (using Hyperterminal or Scantool) I get a connection to
the ECU OK, and can use Mode 1 PIDs and Mode 4, but nothing else seems to
respond. I guess the advice to connect the K- and L-lines together does not
apply to all applications - perhaps it's just the way Suzuki have
implemented it?

Scantool reports sensible values from the Throttle Position Sensor which
corresponds to the accelerator pedal position.

John

-----Original Message-----
From: yupsmith [mailto:y.smith@...]
Sent: 30 September 2003 09:08
To: opendiag@yahoogroups.com
Subject: [opendiag] Re: Bosch EDC15/ Suzuki Grand Vitara HDI

an EDC (Electronic Diesel Control) should have it! Even
though "throttle body" is not the correct name. Consider, that the
mentioned value comes from the TPS (Throttle Position Sensor).
However, I realized this problem with initialization at an EDC ECU
(Zexel) where some people say that it should be the same protocol as
from the Vitara. The reason was the different voltage level. Means,
when I connect K to K there was no response from ECU. When I connect
L to K there was a response from the ECU (monitoring with a scope),
as a result, I build a new interface I found in the web and now it
works.I already found out some basics about the values in the ECU
response, so if the way of communication of our ECUs is the same we
could exchange some ideas. I searched the web but until now I
couldn't find anything compareable. I start comm with 0x10@5 boud,
the ECU responses immediately with frames of 98 bytes as long as the
IG is on, even the K-Line is disconnected.

br
yup

--- In opendiag@yahoogroups.com, Mihnea Cotet <mik@i...> wrote:
> A diesel motor has no thottle body.. could be totally unrelated
though....
>
> HTH,
>
> Mihnea
>
> At 06:29 30/09/2003 +0000, you wrote:
> >I've had some difficulty getting Alex Peper's Explorer to
initialise
> >with the ECU on the Suzuki (via one of Andy Whitaker's
interfaces). I
> >see from a search that some others have found the EDC15 hard to
> >connect to.
> >Problem is now sorted, a piece of advice from Alex worked. I
thought
> >I'd post it because
> >
> >a. it might help others
> >
> >b. I'd love to know WHY it works...
> >
> >The advice was to strap the K- and L- lines together and right
> >enough, it connected first time after that.
> >
> >And another quick query. The data output of the EDC15 includes
> >Throttle Position, but it seems to stay at 0%. Normal?
> >
> >David Miller
>
>
> [Non-text portions of this message have been removed]

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Received on Tue Sep 30 02:01:03 2003