| 1 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation | 
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|  | Connect to the convergence node using the Examiner and select "Configurations" in Active Diagnosis. Carry out the "Audio system test" and check whether the radio produces a beep. | Move on to Step 2 | 1. There is a beep from the radio.2. There is no beep from the radio. | 1. Move on to Step 22. Move on to Step 3 | 
| 2 | MICROPHONE CONNECTIONS CHECK | All OK | Problems encountered | Operation | 
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|  | Check the continuity and the insulation of the electrical circuit between the microphone and the Convergence control unit    See E3570 INTEGRATED RADIO PHONE | Check that the microphone is working properly. Move on to Step 3 | 1. Microphone not correctly connected.2. Wiring between microphone and convergence interrupted.3. Microphone defective. | 1. Restore the correct connection.2. Restore wiring continuity.3. Replace the control panel complete with microphone. | 
| 3 | WIRING CHECK | All OK | Problems encountered | Operation | 
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|  | Check the continuity of the connections between the convergence and the radio. Check that the convergence is receiving the correct power supply    See E3570 INTEGRATED RADIO PHONECheck that the radio is correctly supplied    See E3510  RADIO | End of diagnosis. | 1. Wiring broken.2. Convergence power supply not correct.3. Radio power supply not correct.4. Convergence defective. | 1. Restore the continuity of the connections between the convergence node and the radio.2. Restore correct power supply for the convergence.3. Restore the correct power supply for the radio.4. Replace the convergence control unit    Op. 5570T49 BLUETOOTH ELECTRONIC CONTROL UNIT - R.R. |