AUDIO AND VISUAL SYSTEM > Noise Occurs

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INSPECTION PROCEDURE

1.CHECK SPEAKER INSTALLATION

  1. Check that each speaker is securely installed.

    OK:
    Each speaker is installed securely.

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 in Which Noise Occurs
Noise Type
Depressing accelerator pedal increases noise, and stopping engine stops noise immediately
Generator noise
When A/C or heater is operating
Blower motor noise
  1. When rapidly accelerating on unpaved road
  2. When ignition switch ON
Fuel pump noise
  1. When horn switch is pressed and released
  2. When horn switch is pressed and held down
Horn noise
Running engine causes soft noise, and stopping engine stops noise immediately
Ignition noise
Noise occurs synchronously with turn signal flash
Flasher noise
Noise occurs during window washer operation
Washer noise
Running engine causes noise, but stopping engine does not stop noise
Engine coolant temperature noise
When wiper is operating
Wiper noise
When brake pedal is depressed
Stop light switch noise
Other
Static electricity on vehicle

HINT:
  1. In the chart's left column, find the situation that matches the customer's vehicle. Then, in the right column, find 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