Check Each Connection (Display Audio)

Turn the ignition switch to ON, and then while pressing the buttons (a) and (b), press and hold the button (c) for 3 seconds or more.

Fig 1: Identifying Connection Buttons
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The display will switch to the Line Diag screen.

Fig 2: Identifying Line Diag Screen
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- CHECK MICROPHONE
  Check that "OK" is displayed in MIC.
  
  OK: Normal.
  
  NG: Abnormal. Check the signal line connector. If there are no problems, the unit could be faulty.
- CHECK REARVIEW CAMERA
  Check that "OK" is displayed in Rr_CAM.
  
  OK: Normal.
  
  NG: Abnormal. Check the signal line connector. If there are no problems, the unit could be faulty.
- CHECK AUX
  Check that "OK" is displayed in AUX.
  
  OK: Normal.
  
  NG: Abnormal. Check the signal line connector. If there are no problems, the unit could be faulty.
- CHECK USB
  Check that "OK" is displayed in USB when USB memory is connected.
  
  NOTE:
  When USB memory is connected, it takes approximately 2 seconds for audio unit to recognize the USB memory.
  
  OK: Normal.
  
  NG: Abnormal. Check the signal line connector. If there are no problems, the unit could be faulty.