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George @ BMS George @ BMS is offline
Posts: 1,213
Join Date: Aug 2009
Car: E90 BMW 335i AT
Default 07-04-2019, 09:15 AM

Double check the OBD wire was put on properly on the small end.
Also see if the harness is secured to the circuit board correct and that plug D is installed properly. Faults are typical of a Jb4 that isn't getting power (Plug D is used for this).

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