Diagnosis instructions
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The antenna diagnosis runs as follows:
The self-diagnosis of the antenna diversity is triggered in the test module of the BMW diagnosis system. The self-diagnosis includes a check of the antenna inputs on the basis of a current measurement (direct current). If a fault is found, the antenna diagnosis aborts after the self-diagnosis.
If the self-diagnosis has a positive result, the FM antennas are specifically activated and evaluated with regard to field strength (check of the antennas).
Diagram of antenna diagnosis:
| Index | Explanation |
|---|---|
| 1 | Normal receive mode (t1 to t2: diversity 2.5 Volt) |
| 2 | Self-diagnosis |
| 3 | Test of the antennas (t6 to t8: switching pulse 8.5 Volt) |
| 4 | Self-diagnosis has positive result (t2 to t5: 5 Volt) |
| 5 | Self-diagnosis has negative result: fault detected (t3 to t4: 0 Volt) |
| 6 | Actions triggered by the antenna diagnosis (t9: AM 0 Volt |
No liability can be accepted for printing or other faults. Subject to changes of a technical nature