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Onboard diagnosis interface - reading ECU data?

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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

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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

Reply to
Thorsten Ostermann
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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

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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

Reply to
Michael Pardee

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

Reply to
Thorsten Ostermann

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.

Reply to
JPUN

Sounds like classic main relay problems

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By the way, your caps lock is on.

Mike

Reply to
Michael Pardee

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