Navigation System Noise Occurs

INSPECTION PROCEDURE

NOISE CONDITION

CHECK SPEAKERS

CHECK NOISE CONDITIONS

INSPECTION PROCEDURE

1. Check from which direction the noise comes.
   

   1. Front No. 1 speaker assembly LH
      
   2. Front No. 1 speaker assembly RH
      
   3. Front No. 2 speaker assembly LH
      
   4. Front No. 2 speaker assembly RH
      
   5. Rear speaker assembly LH
      
   6. Rear speaker assembly RH
      

   OK:

   The location of the noise source can be determined.
   

1. Check the installation conditions of the speaker units that are located near the noise source and that there are no cracks, scratches, deformation or other malfunctions.
   
   

   Result

   Result	Proceed to
   No malfunction is found	A
   A speaker is installed incorrectly	B
   Foreign objects are in the speaker	C
   A speaker cone is broken	D

1. Check the noise condition.
   

   HINT:

   The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed and wired correctly.

   
   

   Condition Under Which Noise Occurs	Noise Source
   Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped.	Generator
   Noise occurs during A/C or heater operation.	Blower motor
   Noise occurs when the horn switch is pressed and released or when pressed and held.	Horn
   Noise occurs synchronously with the blink of the turn signal.	Flasher
   Noise occurs during window washer operation.	Washer
   Noise occurs during wiper operation.	Wiper
   Noise occurs when the brake pedal is depressed.	Stop light switch
   Others	Static electricity

   HINT:

   1. In the left column of the chart, find the situation that matches the customer complaint. Then, in the right column, find the part that is causing the noise. Check the noise filter on or for the part.
      
   2. To save time and avoid a misdiagnosis, first make sure that the noise is not coming from outside the vehicle.
      
   3. Noise should be removed in descending order of loudness.
      
   4. Setting the radio to a frequency where no signal is received may make recognition of the noise problem easier.
      

   OK:

   The noise source cannot be determined.