With mileage of about 61,000 km, the configuration engine N52 BMW 730Li sedan. The car DSC, DTC, AL, RPA alarm, steering weight.
Troubleshooting: read fault codes to DSC non-communication, the door handle on the positive short circuits.
Check the fuse F02 DSC burned when power is found, check the fuse wire F02 DSC before did not find abnormalities.
According to WDS, DSC and found four car door handle shared F02 fuse, short circuit to ground when measuring the fuse power. Some time after replacing broken will.
Check 4 exterior door handle power BMW scanner line short circuit, when the removal of the driver's car door handles, short circuit disappears, the fuse is not burned.
Remove the door handle individually measured and found this door handle and ground power is turned on.
Replace the door handle, install fuse, remove the failed test, test times normal feedback.
Fault Summary: car door handle short fuse F02 insurance, resulting in DSC control unit can not communicate, followed by the entire power bus failure phenomenon, we encounter all lot. To more people mind you, when you encounter this failure is not only to replace the fuse, and to further examine the cause of the blown fuse.