| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Check that the volume knob in the centre console is correctly adjusted. | Move on to Step 1 | Volume knob turned completely in an anti-clockwise direction | Adjust the volume correctly |
| 1 | ELECTRICAL CHECKS | All OK | Problems encountered | Operation |
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| Check that the speaker connections are correctly connected. | Move on to Step 2 | Speaker connections broken | Restore the correct continuity. |
| 2 | CONTROLS ON THE STEERING WHEEL CHECK | All OK | Problems encountered | Operation |
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| Check, by connecting the Examiner to the Convergence control unit, that the controls on the steering wheel for adjusting the volume which can increase/decrease the audio volume are working properly See E3570 INTEGRATED RADIO PHONEIf necessary, disconnect the controls on the steering wheel from the centre console and check that the fault disappears. | End of diagnosis | Audio volume controls on the sterring wheel defective | Replace the controls on the steering wheel Op. 5570T66 MODULE (ONE) ON STEERING WHEEL FOR RADIO CONTROL - R+R |