|
since 1996 cars in america have to have the OBDII socket in the cabin and from 2002 in europe.
Some BMWs in europe before 2002 were obdii compliant but did not have the OBDII socket, in these cases BMW will tell you they are not compliant. Checking of pin 2 (sometimes labelled OBDII) or pin 17 (TXII or second K line) of the 20 pin DLC under the hood, they are only present if OBDII is supported.
There is a cable on EBAY (that i have used successfully with an elm 323) that goes from this 20 pin DLC to DB9 (the Elm interphase connection which is fairly standard), my car has pin 17 populated.
There was then a period where BMW put both sockets in the cars, in these cases compliance is obvious but the cap must be in place on the 20 pin dlc for the inside socket to work.
BMW used ISO 9141 protocol on earlier vehicles but are now using the CAN protocol.
elm 323 = ISO only, ELM 327 does all protocols.
|