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View Full Version : OBD II Multiplexer tester, cooperation design



budesonida
19th September, 2015, 06:28 PM
Hi, i'm trying to build a tester for check the Multiplexer connection with the software.
Sometimes connect 12v to pin 16 and ground to pin 5 it's not enought.


It must works with BMW, MB, VAG as minimum. Just plug the tester in OBD2 connector and the OEM Software will detect the car is plugged.
Obviously at a certain point the diagnostic software will tell you that there is no connection, but initially will detect that the multiplexer and car is online.


I'm going to buy a cheap obd2 empty conector and do the bridges, then connect it to a 12v power suply. This is the schema.

331914

Pin 1-2-16 is for ignition in ISTA and ODIS
Pin 6-14 with 120ohm resistor is for vediamo.

Do you think that the design is correct?, it will work in all circumstances?, you can add some more? ...


Any suggestion will be welcome.

budesonida
24th September, 2015, 07:40 PM
no suggestions, the design must be perfect! Lol

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jakesman
17th October, 2015, 07:33 AM
it looks more like u actualy showed us how to do it , is it working , it should , and now i have something new to build thanx