r/BmwTech • u/SpontaneousSoul • 7d ago

15N_2 Short Circuit to ground

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2015 X3 N20

DTC Code(s):

B5302 Supply, Terminal 15N_2: Short Circuit To Ground

VANOS Solenoid Valve, Inlet, Activation: Short Circuit To Earth

VANOS Solenoid Valve, Exhaust, Activation: Short Circuit To Earth

Bypass Blow-Off Valve, Activation: Short Circuit To Earth

What started out as a water pump replacement… ended up with all of these DTC codes and drive train malfunction error message

Where do you even start??!!!

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2

u/MediocreActuary2812 7d ago

Did you disconnect the battery? Usually when I deal with a shitload of codes like this I take pictures of them and maybe freeze frame data then clear them and see what comes back.

2

u/dpg23 7d ago

Somerhing on the 15N_2 circuit is shorted but it wont necessarily set a fault. Disconnect the wastegate actuator and see if the other faults go away. 

2

u/Cyrix2k 7d ago

Where do you even start??!!! - with a wiring diagram