Onboard diagnosis interface - reading ECU data?

Discussion in 'General Motoring' started by Thorsten Ostermann, Jun 21, 2005.

  1. [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
     
    Thorsten Ostermann, Jun 21, 2005
    #1
  2. 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/3173_ICCR_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
     
    Michael Pardee, Jun 21, 2005
    #2
  3. 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/3173_ICCR_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
     
    Michael Pardee, Jun 21, 2005
    #3
  4. Hi Michael!
    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.
    There is actually a CAN version of OBD-II, but AFAIK Honda uses the ISO
    protocoll for cars at least up to 2004.
    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. :-(
    Thanks, I allready know this paper. But I'm (primary) not interested in
    reading the vault codes...

    Kind regards
    Thorsten
     
    Thorsten Ostermann, Jun 21, 2005
    #4
  5. Hi Michael!
    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.
    There is actually a CAN version of OBD-II, but AFAIK Honda uses the ISO
    protocoll for cars at least up to 2004.
    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. :-(
    Thanks, I allready know this paper. But I'm (primary) not interested in
    reading the vault codes...

    Kind regards
    Thorsten
     
    Thorsten Ostermann, Jun 21, 2005
    #5
  6. Thorsten Ostermann

    JPUN Guest

    DID U EVER GET ANY INFO ON THAT PROB. MY HONDA TURNS ON BUT DOESNT STAY ON.
    A COMPLETE TUNE UP HAS ALREADY BEEN DONE FUSES CHECKED AND ROTOR AND CAP
    LOOK GOOD.
     
    JPUN, Jul 6, 2005
    #6
  7. Sounds like classic main relay problems
    http://tegger.com/hondafaq/faq.html#stalling

    By the way, your caps lock is on.

    Mike
     
    Michael Pardee, Jul 6, 2005
    #7
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