AUDIO AND VISUAL SYSTEM (w/o Stereo Component Amplifier) Noise Occurs

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SPEAKER INSTALLATION


    1. Check that each speaker is securely installed.

      OK
      Each speaker is securely installed.

    NG

    INSTALL SPEAKER PROPERLY

    OK

  2. IDENTIFY NOISE SOURCE


    1. Check the noise condition.

      Tech Tips

      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

      • When rapidly accelerating on unpaved road

      • When ignition switch is ON

      		 Fuel pump noise

      • When horn switch is pressed and released

      • 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 sensor noise
      When wiper is operating Wiper noise
      When brake pedal is depressed Stop light switch noise
      Other Static electricity on vehicle

      Tech Tips


      • In the left column of the chart, find the situation that matches the vehicle of the customer. Then, in the right column, find the part that is causing the noise. Check the noise filter on the part.

      • To save time and avoid a misdiagnosis, first make sure that the noise is not originating from outside the vehicle.

      • Troubleshoot noise problems in order of loudness, starting with the loudest noise.

      • Setting the radio to a frequency that receives no signal may make recognition of the noise problem easier.

      OK
      The noise source can be determined.

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE NOISE SOURCE