GSIC - Global Service Information Center

### 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:
     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