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Hi Klaus,
Bluetooth is a wireless communication. I have been trying several cables and OBD programs in PC (a simple cable and VOL-FCR works to reset service light in 850 1996), but no continuous on-line readings from sensors and it is always a hassle with cables because the COM port settings in the PC change after you have been using other devices, leading to gray hairs until you get the settings adjusted again. Therfore I tried this OBD reader (sorry for Swedish page but this is the one I actually used) http://www.teknikmagasinet.se/db.pl?tf=product_link.html&link=&artnr=160068&title=Diagnosticeringsverktyg%20f%f6r%20bil&
You will find similar ones on many other sites. I have tested it with the program Torque for a Samsung Galaxy phone, and it works with that also, however the responses are quicker with the Nokia, and the OBDscope program is faster in connecting, and you can scroll between the different sensor readings by just using the up and down pressing of the navigation button in my Nokia 6110. Both the Torque program for Android and the OBDscope program have the nice ability to automatically scan for which protocol the car ECU uses to send signals to the OBD connector. So no need to be a computer nerd, once you get the Bluetooth connection permanently paired (see below).
Install OBDscope program in phone by dowloading OBDscope trial version (a *.sisx file of about 1.2 MB) and transferring it to phone (can probably be downloaded directly into phone if you know how), I put it in phone main memory. This transfer I did with a USB cable and the Nokia PC Suite program. Activate the installation as I indicated in first post. You should now have an icon in your phone with the OBDscope logo.
Two things are subssequently important. 1) you need to turn on Bluetooth in your phone. A tiny Bluetooth symbol should appear in top part of phone screen.
2)Put OBD Bluetooth reader in car OBD connector so it gets power (one red LED lit in OBD Bluetooth reader, and turn ignition on so it communicates with car ECU.
3) Then start OBDscope program by choosing and "pressing" OBDscope icon in phone. You should now see yelow LEDs lighting up in the OBD Bluetooth reader, indicating that communication is starting.
4) The phone might the first time you do this ask you to confirm that you want pairing of the wireless Bluetooth with the OBD interface. If you need a security code it was 1 2 3 4 in my case. If asked if you always want to allow this communication, answe yes.
5) Now you might have to wait a little while (10-20 sec), and watch the phone establish the connection. If you don´t get connection, make shure ignition is in the position II so ECU has power. If still not working, go into phone´s way of pairing with Bluetooth devices and establish a permanent pairing with the OBD Bluetooth reader, and then restart OBDscope
6) When the program has started succesfully, choose to read the paramater Coolant temperature. In my experience, this is the parameter that "always" is readable (in my 2004 V70 diesel, this was one of the few the program could read). You will have a nice monochrome graphic experience!
7) start engine, and check other pramaters such as REVs, watch how O2 sensor starts regulating as engine warms up. Beatiful live monochrome graphics again.
More to say, but pressed for time. This should work. If you like it, download full version from Nokia store for about 15 USD after the 7 day trial. This has to be downloaded directly into phone via a, IMHO, slightly cumbersome method (you need to register at the Nokia site, I managed to avoid allowing the site to send me advertising, although this took a bit of trial and terror).
Hope this will be of use to you and the BBoard, to which you are such a great contributor! Maybe reasons for specific thread by you or anyone else more knowledgeable in O2 sensors and ECUs than me, if this turns out to be as useful as I suspect it might be.
For those who have not yet the economical means for an Android phone, this is a fully working alternative. Not as graphically flashy, but truly neat display of really interesting data with very fast responses, and in full version claims to have fault code reset capacity. PDF manual downloadable from OBDscope site.
You can at the Nokia site supposedly check whether your specific model should be compatible with the OBDscope program.
Don´t throw away your Nokia Symbian S60 phones with version 3.0 or later, until you have tried this! Get your friends phone if he/she is not using it. There should be many lying around in this craze for flashy touch-screens. The touch-screen Symbians can give you the multicolor graphic joys with this program, but I don´t feel the need.
Gustaf
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