Symptom Related Diagnostic Procedures

EMC Measures E81, E87 And R56

Measures to increase electromagnetic compatibility
For certain known fault profiles, design measures have already been implemented in production.
Check these design measures in the event of EMC faults:
1. Earth strap on the luggage compartment lid
Fault profile with effect:
corrosion means that the earth connection between the luggage compartment lid and body is lost. This means that the luggage compartment lid oscillates and is electrically undefined.
The reception deteriorates 2 to 3 years after production of the vehicle.











Notes for Service department

Diagnosis instructions

The aerial diagnosis runs as follows:
The self-diagnosis of the aerial diversity is triggered in the test module of the BMW diagnosis system. The selfdiagnosis includes a check of the aerial inputs on the basis of a current measurement (direct current). If a fault is found, the aerial diagnosis aborts after the self-diagnosis.
If the self-diagnosis has a positive result, the FM aerials are specifically activated and evaluated with regard to field strength (check of the aerials).

Diagram of aerial diagnosis: