AUDIO AND VISUAL SYSTEM > Noise Occurs

for Preparation Click here


INSPECTION PROCEDURE

1.CHECK SPEAKER INSTALLATION

  1. Check that each speaker is securely installed.

    OK:
    Speakers are installed securely.

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


Condition in Which Noise Occurs
Noise Type
Increases when accelerator pedal is depressed, and stops immediately when engine is stopped
Generator noise
When A/C or heater is operating
Blower motor noise
  1. When vehicle is rapidly accelerated on unpaved road
  2. When ignition switch is ON
Fuel pump noise
  1. When horn switch is pressed and released
  2. When horn switch is pressed and held down
Horn noise
Occurs faintly when engine is running, and stops immediately when engine is stopped
Ignition noise
When turn signal is operating
Flasher noise
When window washer is operating
Washer noise
When engine is running, and continues even when engine is stopped
Engine coolant temperature sensor noise
When wipers are operating
Wiper noise
When brake pedal is depressed
Stop light switch noise
Other than above
Static electricity on vehicle

HINT:
  1. Use the table above to identify the part that is causing the noise. Check the noise filter on the part.
  2. To save time and avoid a misdiagnosis, first make sure that the noise is not originating from outside the vehicle.
  3. Troubleshoot noise problems in order of loudness, starting with the loudest noise.
  4. Setting the radio to a frequency that receives no signal may make recognition of the noise problem easier.



NG
INSTALL SPEAKER PROPERLY
OK

IDENTIFY NOISE SOURCE