BMW MSD80 Fuel Injector Fault Code Diagnosis - 30BA 30BB

BMW models with Turbocharged N54 engines and MSD80 DME Software can develop fuel injector MOSFET driver failure. This will cause an injector to stop delivering fuel and an engine misfire to occur. The check engine light will be ON with the related Fault Codes (error messages):
30BA DME digital motor electronics, internal failure
30BB DME digital motor electronics, internal failure

This video shows you how to diagnose these fault codes and test the signal from the DME to the fuel injectors. You will also see how to isolate and test each wire for the fuel injectors and test the DME MOSFET Drivers.

Affected models:
2007-2013 BMW 135i (E82)
2007-2008 BMW 335i (E90)
2007-2008 BMW 335xi (E91)
2007-2010 BMW 335i (E92)
2007-2010 BMW 335i (E93)
2009-2010 BMW 535i & 535xi (E60)
2009-2016 BMW Z4 35i (E89)

WARNING HIGH VOLTAGE: Piezo injectors normally operate at voltages up to 200 volts. Extreme care should be taken to protect against shock. Do not touch any of the injector terminals while the engine is running.