Here is the wiring diagram for the newer E39s with only the OBD-II Plug. The SAE standard pinout is 6 (CAN high) and 14 (CAN low).Īfter that BMW went with Ethernet that typically uses pins 3, 8, 11, 12, and 13 (but this is not standardized). The generation of cars after the E39 moved to CAN mid-2007 and I'd expect that BMW decided to expose more than just DME+EGS over the diagnostic CAN bus. Connecting the two pins together works because of how the K-line signaling works, the overly simplified version is that you're not talking to more than one module at a time so it all just works.Įarlier BMWs used separate transmit and receive lines (and a wakeup line, L) which might be confusing. Pin 8 is labeled "manufacturer discretion" and on the early 00s cars BMW put a second K-line on that pin and connected it to everything else. Pin 7 is defined by SAE J1962 as the K-line pin and on an E39 only the DME and EGS computers are connected to that pin – that's all that OBD2 cares about. Pins 7 and 8 are connected to physically separate buses. On the E39 the wiring diagrams show that this connector was dropped starting with September 2000 builds (the E46 switched over a bit earlier). So is this mainly a INPA issue, where it only reads one of the pins? And thus requires the user to put all data from the two pins into one, to kind of force feed this information into the system?Įdit: How come we have to bridge both pins in our models and not newer models? What is the difference between the two?If you're looking at a wiring diagram with a round (ADS, X6002) connector you're looking at the wrong wiring diagram. I will tell you that the pirates version of TechStream that you can find on the internet or order off Amazon can be a bit finicky to get set up.Thanks guys. Techstream of course can dive much deeper into the car, and you can find copies of that out on the internet and you can order a OBD2 to USB dongle off Amazon to talk to the laptop. So you could use an old Android tablet or an old Android cell phone pick one up cheap. And for all of those you will need a Bluetooth OBD2 connector and either a Android phone or iOS although I don't think torque works with iOS. But torque can do that too, you need to download the appropriate data set for torque to talk to the Prius Beyond just basic OBD2. I would say doctor Prius gives more useful information about the battery. They can all be useful in their own ways. Prius is one, hybrid assistant, gives information, but less about the battery. There are a few different apps that can give you different information, Dr.
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