Hi jcf
If 5v present on between 1-2 pins , there is no damages and all should work.
What module names do you see during pairing with smartphone or PC?
Did you try to eneter password 1234 during pairing?
You don't need to connect jp1.2 if ref voltage of ECU is 5v. Just set jumper to "Motronic " position, in this case the converter will use internal 5v reference.
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