OBD II question on Ford F150 5.4 year 2007
Hi guys
I am busy modifying my 5.4 3V from 2007. To finish the modification I need to know the protocol OBD used. I guess it's a 500KB CAN or a 250KB. I have already searched with forscan and torque pro but I see nowhere the communication protocol used. I believe that with protocol 500 and 250 the terminals used for the signal are terminal 6 and 14 of the DLC connector (OBD II) Maybe someone here could inform me and help me. thank you in |
The obd2 spec has provisions for multiple connection methods (SAE J1850, ISO 15765(CAN BUS), ISO9141 (K-Line), ISO14230 (KWP2000)). On my 2004, Ford only wired one connection method to the OBD2 port - CAN BUS (Pins 6 & 14).
With CAN there can be up to 3 different buses.
I don't have a definitive answer for you, but most manufactures use 500 k/Bps for their high-speed CAN. Also, keep in mind that OBD2 is a distinct, separate protocol from CAN. Just because you can read OBD2 codes does not mean the manufacturer has presented the CANbus to the OBD2 port. |
I have to check it is a 15765 (can 500kbs).
I asked this question for my propane installation. Because if I connect it is two wire the propane ECU communicates better with the ECU ford to make the fuel adaptation. However, I have another problem. When I turn on propane he throws me a DTC P0191 and but waiting for a DTC P1235. This sounds a bit logical to me since the fuel pump is running but the injectors are no longer working because the propane injector is working. I think I should install a fuel pump or fuel pressure emulator that activates when the engine is running on the propane. |
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