Audio And Visual System (For Radio And Display Type) Noise Occurs

INSPECTION PROCEDURE

NOISE CONDITION

CHECK SPEAKERS

CHECK NOISE CONDITION

INSPECTION PROCEDURE

1. Check from which direction the noise comes (front left or right, rear left or right).
   

   1. Check from which direction the noise comes.
      

      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

   Condition	Proceed to
   A speaker is installed incorrectly	A
   Foreign objects are in the speaker	B
   A speaker cone paper is broken	C
   No malfunction is found	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 vehicle accelerates rapidly on an unpaved road or after the engine switch is turned on (IG).	Fuel pump
   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 while the engine is running, and continues even after the engine is stopped.	Engine coolant temperature sensor
   Noise occurs during wiper operation.	Wiper
   Noise occurs when the brake pedal is depressed.	Stop light switch
   Other	Static electricity

   HINT:

   1. In the chart left column, find the situation that matches the customer's complaint. Then, in the right column, find the part that is causing the noise. Check the respective noise filter.
      
   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.