'95 Legacy w/OBDII connector not OBDII compliant?

[rootcon]

Greetings,
I have a 1995 Subaru legacy in both automatic transmission and manual.
Both cars have the obdII connector and say they are OBDII compliant
(iso9141-2) on the emissions sticker, but they do not respond to obdII
scans.

I am using the multiplex engineering (www.multiplex-engineering.com)
t16_003 connector and freediag (freediag.sourceforge.net). I've
successfully used this system on a 2000 Subaru Legacy and a 2001
Corolla, but they fail on both 1995s. I understand that in the
initiation, timing is strict at 5 baud, and this is where both ecus
fail to respond. I've also heard reports from others that 1995s don't
work with this software.

I modified the source code to not scan for test modes 5-9 (perhaps my
engine doens't support it), but that didn't help.

Does anyone know what subaru did differently in the early years of
OBDII to cause this non-compliance? ..Specifically in the initiation.
I'm a c++ programmer, so I can modify the software if someone cues me
in.

 

[Ralph E Lindberg]

Greetings,
I have a 1995 Subaru legacy in both automatic transmission and manual.
Both cars have the obdII connector and say they are OBDII compliant
(iso9141-2) on the emissions sticker, but they do not respond to obdII
scans.

I am using the multiplex engineering (www.multiplex-engineering.com)
t16_003 connector and freediag (freediag.sourceforge.net). I've
successfully used this system on a 2000 Subaru Legacy and a 2001
Corolla, but they fail on both 1995s. I understand that in the
initiation, timing is strict at 5 baud, and this is where both ecus
fail to respond. I've also heard reports from others that 1995s don't
work with this software.

I modified the source code to not scan for test modes 5-9 (perhaps my
engine doens't support it), but that didn't help.

Does anyone know what subaru did differently in the early years of
OBDII to cause this non-compliance? ..Specifically in the initiation.
I'm a c++ programmer, so I can modify the software if someone cues me
in.

All I can tell you is mine is (95 Legacy). I haven't tried the
Sourceforge application since the commercial product I have works with
everything I own (http://obd-2.com/) I also wack too much code at work
to want to mess at home

--

 

[rootcon]

All I can tell you is mine is (95 Legacy). I haven't tried the
Sourceforge application since the commercial product I have works with
everything I own (http://obd-2.com/)

The interface you own, the alex peper one, is also made by
multiplex-engineering. My interface has a destination address of 0x25,
which is different from yours. If I had the source code to the alex
peper project, I could make it work with my interface.

Couple of questions -- is your 95 a manual or auto? Also, what is the
date of manufacture?

 

[Ralph E Lindberg]

The interface you own, the alex peper one, is also made by
multiplex-engineering. My interface has a destination address of 0x25,
which is different from yours. If I had the source code to the alex
peper project, I could make it work with my interface.

Couple of questions -- is your 95 a manual or auto? Also, what is the
date of manufacture?

Manual and I don't know...

--

 

[rootcon]

I'm thinking of writing some software for the '95 subarus out there
that don't work with freediag (freediag.sourceforge.net). Everywhere I
look, people say the 1995 legacy auto version is obdII compliant but
the manual trans. is not. what is different about the manual? Can i do
more with the obdII port than just obdII stuff (ie change ecu
registers)?

thx guys,
Derek

 

[Ralph E Lindberg]

I'm thinking of writing some software for the '95 subarus out there
that don't work with freediag (freediag.sourceforge.net). Everywhere I
look, people say the 1995 legacy auto version is obdII compliant but
the manual trans. is not. what is different about the manual? Can i do
more with the obdII port than just obdII stuff (ie change ecu
registers)?

Derek, I don't know where you've been reading, but I know of at least
one manual 95 that is OBD-2.

--

 

[rootcon]

Derek, I don't know where you've been reading, but I know of at least

one manual 95 that is OBD-2.

Not reading... Experiencing. I own both '95s, the auto and 5spd. The
auto I can get freeze frame data (rpm, coolant, MAF, oxygen voltage,
engine load, etc). The 5 spd refuses to acknowlege the 5 baud
initiation sequence.

I'm not the only one who has experience this either.
http://www.obdii.com/connector.html says a/t only, and if you go to the
freediag forums, several people have reported problems with their '95s
and obdII.

At some point, I'm going to code up a fix (you gotta love open source).
Its just a bitch to work on because I have to bring my whole computer
outside to test/code. And now its winter. Its too bad no one makes a
100ft rs232c serial cable.

 

[Edward Hayes]

I have read (no experience personally) that the change to OBD2 was
1996 and some late manufactured 1995 were also OBD2 compliant.

 

[Bill Pelka]

Greetings all,
I have a '95 Legacy LSI and I have the OBDII. My reader works fine. A/T
also.

Bill