![]() So, I lifted the pin (UBatt_1.jpg) and used a transistor BC547/1K/10K as inverter to pull this pin to GND if the interface gets +12V on pin 16 of the OBD2 connector (UBatt_2.jpg). ![]() That is why the UBatt dot is always black. Seems the RI pin on the FTD232RL is directly connected to GND on the board. ![]() See picture "Ignition.jpg" resistors R5 & R6. That solved the Ignition ON indication problem. These were not the proper values to get ~5V at the junction between both resistors. However the values and connections were as: Traced back the tracks from OBD2 pin 1 and found 2 resistors mounted on the board as voltage dividers. Interface connected to OBD2 or not.ĭecided to try to fix this and started to read.įound that RI from TTL-USB converter is used to indicate UBatt and DSR/DTR is used to indicate Ignition ON. While connecting and testing the interface I found the UBatt and Ignition dots were always black. Installed BMW Standard Tools 2.12 as per instructions of our friend Bimmer with all software he provided in his thread. ![]() Interface looks very well designed and has a nice PCB, all components soldered properly on the board. So, got my self a high quality INPA K+DCAN Interface from China. ![]()
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