OBD-2 Question

[oslinux]

ok! i'm about to fry my ECU

Just Joking, i hope

Thank you for your answers!

Luca

[skimask]

ok! i'm about to fry my ECU

Just Joking, i hope

Thank you for your answers!

Luca

Just curious...
Are you using J1962 cable/connector or did you tap into the wiring itself?
I did it both ways; one car I clipped the wiring behind the connector and plugged in a standard DB9 connector, another one I went with a USB connector. Someday I'll decide on one method...

[oslinux]

i used the cable, then the DB9 connector, the news are:

It works!

and well too!

Now i'm building the pic circuit, but i found it pretty easy to do, i'm planning to use the usb port of the pic (18F4550) to communicate with a pc (Using a software made by me),
Now i've just two questions:

1. where i can find codes to communicate with the car and read the sensors?
2. what software do you suggest to use with the pc connected directly to the serial port? (FreeWare is good, Open Source is better!)

Thank you!

Luca

[DynamoBen]

Technically you would need the SAE standard for the codes. However there are a number of websites that will give you the basic OBDII commands.

As far as software, go to scantool.net and use their opensource software. If you look through their code you will find most of the OBDII commands.

[skimask]

1 - www.google.com that was my prime source
2 - self designed PCB, PIC driven, buttons, LCD, etc..., no PC required but USB downloading from datalog memory in the works...

[oslinux]

I'm building too a controller with a pic 18F4550, LCD 4*20 White on Black, buttons to show RPM/Coolant Temp/others and an eeprom, to test it i've coded a pic16f84 to emulate the ELM, it's cool

in my car (Ford KA) i don't even have the RPM counter, so this will be somewhat useful for the driver.

for the pids, i found them in wikipedia, but they says that there are more modes above #9, from the vehicle manufactures, it's possible to get the additional pids for ford in the net?

Luca

[skimask]

for the pids, i found them in wikipedia, but they says that there are more modes above #9, from the vehicle manufactures, it's possible to get the additional pids for ford in the net?
Luca

The big question is 'is it possible to get all the PIDs for all the vehicles out there without paying an arm and a leg'?
With the new CAN bus out there, you can control anything thru it apparently.