Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SPEAKER INSTALLATION

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.

SPEAKER INSTALLATION

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

HINT:

In the table'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.
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.

NG: INSTALL SPEAKER PROPERLY
OK: IDENTIFY NOISE SOURCE