OBD-II

[Craig Pugsley]

> | FYI:
> | 
> | OBD-II = On-Board Diagnostics II
> | 
> | (a system intended to indentify component and systems failures
> | which prevent a vehicle from meeting emissions regulations)
> | 
> | Anthony Tsakiris
> | 
> 
> 
> It's more than that, it also defines a standard one or two wire serial bus 
> that the ECM uses to communicate with sensors and other equipment (including 
> diagnostic equipment), and a standard for the information packets that are 
> placed on the bus.  So one diagnostic computer will work for all cars.  This 
> would indeed be a good feature to include on a diy-efi computer.

Is the 2 wire serial bus structure the same as the CAN bus developed by
Bosch as a comms system for motor vehicles? Motorola have (according to
the article) a 68HC705X4 with a CAN interface. Also according to the
article it is different to the J1850 bus.

Craig.