[Demonhawk]

The freescale chip is being powered from the obd port. The only difference I have in the diagram is rather than having the power from the obd go to freescale chip and the arduino I just have it going to the freescale chip. All the grounds from the obd port are grounded to the freescale chip and the arduino as per the diagram. I don't know if it makes much of a difference but the power from the obd connector in my car is 13v instead of 12v.