Honda Car Forum

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Hi!

Has anyone experience with reading sensor values (e.g. lambda, speed,
temperature) from the ECU via the diagnosis interface? For cars
manufactured in 2000 and later, this interface is a standard called
OBD-2. But what about older Honda cars? Many VWs are OBD-2 compliant,
even if manufactured before 2000. Is it the same for Honda?

Recording to
http://www.hondata.com/techecuid.html
the ECU units build in 1996 and later are called "OBD2", so they may
behave similar to the standard, even if the connetor is different. But
what about older ECUs (called "OBD1")?

I'm especially interested in doing this diagnosis for Honda Civic and
del sol (EG and EH types, 1992-1998). But any links or infos are
appreciated!

Kind regards
Thorsten

"Thorsten Ostermann" <News@Ostermann-net.de> wrote in message
news:3hpth4Fi3d4pU1@news.dfncis.de...
> [X'post to rec.autos.makers.honda and alt.autos.honda]
>
> Hi!
>
> Has anyone experience with reading sensor values (e.g. lambda, speed,
> temperature) from the ECU via the diagnosis interface? For cars
> manufactured in 2000 and later, this interface is a standard called OBD-2.
> But what about older Honda cars? Many VWs are OBD-2 compliant, even if
> manufactured before 2000. Is it the same for Honda?
>
> Recording to
> http://www.hondata.com/techecuid.html
> the ECU units build in 1996 and later are called "OBD2", so they may
> behave similar to the standard, even if the connetor is different. But
> what about older ECUs (called "OBD1")?
>
> I'm especially interested in doing this diagnosis for Honda Civic and del
> sol (EG and EH types, 1992-1998). But any links or infos are appreciated!
>
> Kind regards
> Thorsten

In the US, all cars sold new after January 1, 1996 were required to be OBD
II compliant, and the connectors are all OBD II connectors. More recently a
second standard, CAN, has come out for communicating with other controllers
in the car but OBD II is still there. An OBD II reader connected to the
access connector near the driver's knees will still yield all the mandatory
emissions info. As to analog values like sensor numbers, I don't know. Those
definitely are not available on the pre-OBD II cars and I have doubts about
the '96-'98 cars, too.

For the pre-'96 Hondas, check out
http://www.iequus.com/assets/manuals..._E_14JAN03.pdf
for instructions. Note that anywhere they talk about a "reader" it is a
simple jumper that shorts the two connector pins. (I should know - I bought
the $35 kit that consisted of the manual, two different shaped jumpers -the
other is for Toyotas - and a plastic screwdriver for Nissans.) In each case,
the procedure only reports stored codes and the manual provides instructions
for clearing them.

Mike

Hi Michael!

> In the US, all cars sold new after January 1, 1996 were required to be OBD
> II compliant, and the connectors are all OBD II connectors.

So I thought my del sol has to have an OBD connector, but it hasn't. It
seems that especially the european hondas (96-00 modells) have ECUs with
reduced funcionality compared to the US versions. But it has a kind of
communication connector. I will go for a test. I ordered a ODB-II
compliant interface and will test it on my 2005 Civic and my '96 del sol.

> More recently a
> second standard, CAN, has come out for communicating with other controllers
> in the car but OBD II is still there.

There is actually a CAN version of OBD-II, but AFAIK Honda uses the ISO
protocoll for cars at least up to 2004.

> An OBD II reader connected to the
> access connector near the driver's knees will still yield all the mandatory
> emissions info. As to analog values like sensor numbers, I don't know. Those
> definitely are not available on the pre-OBD II cars and I have doubts about
> the '96-'98 cars, too.

I know that there is a way to do it (because there are products
available), even with Honda OBD-I ECUs, but I can't find any information
how to do it on my own. :-(

> For the pre-'96 Hondas, check out
> http://www.iequus.com/assets/manuals..._E_14JAN03.pdf
> for instructions. Note that anywhere they talk about a "reader" it is a
> simple jumper that shorts the two connector pins.

Thanks, I allready know this paper. But I'm (primary) not interested in
reading the vault codes...

Kind regards
Thorsten