Quote:
Originally Posted by trebuchet03
I know you can buy, from SAE, the book on the OBDII protocols and how to interface - probably something necessary if you want to plug into the diagnostics port and not tap a bunch of misc. wires.
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1.
2. Bus positive Line of SAE-J1850
3.
4. Chassis ground
5. Signal ground
6. CAN high (ISO 15765-4 and SAE-J2234)
7. K line of ISO 9141-2 and ISO 14230-4
8.
9.
10. Bus negative Line of SAE-J1850
11.
12.
13.
14. CAN low (ISO 15765-4 and SAE-J2234)
15. L line of ISO 9141-2 and ISO 14230-4
16. Battery voltage
The assignment of unspecified pins is left to the vehicle manufacturer's discretion.
PID's for requesting information (i.e. water temp, TP, vehicle speed, etc.)
Now,
how to use all that data...
- LostCause