Toyota Corolla Cross: In all Modes Noise Occurs in all of the Speakers

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / In all Modes Noise Occurs in all of the Speakers

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

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PROCEDURE

1.	CHECK MODEL

Result	Proceed to
for 6 Speakers	A
for 9 Speakers	B

GO TO STEP 4

2.	CHECK SPEAKER INSTALLATION

(a) Make sure that there are no abnormalities such as looseness or play in the installation of each speaker.

(b) Make sure that there are no abnormalities with each speaker such as the presence of foreign material or tears in the paper of the speaker cone.

Result	Proceed to
No speaker abnormalities	A
Speaker is improperly installed	B
Foreign material is found in the speaker	C
Paper of the speaker cone is torn	D

INSTALL THE SPEAKER CORRECTLY

REMOVE FOREIGN MATTER FROM THE SPEAKER

REPLACE RESPECTIVE PARTS

3.	DETERMINE CAUSE OF NOISE

(a) Using the following diagnosis table, determine the cause of noise.

HINT:

Confirm that noise is not coming from outside the speaker. Make sure to perform this procedure correctly, otherwise the source of noise may be unclear resulting in the cause being misdiagnosed.
When performing the noise prevention procedure, start the inspection from the device with the most noise.
Set the radio to a frequency with no broadcast (untuned) so that the noise is more pronounced and easier to judge.

Symptom table:

Condition under which Noise Occurs	Noise Source
A whirring noise occurs when the air conditioner or heater is operating.	Noise from the blower motor
A click sound occurs when the horn button is pressed, and a buzzing sound is heard when pressed and held.	Noise from the horn
A small buzzing sound occurs until the engine stops.	Ignition noise
Clicking sound occurs synchronously with the turn signal blinking pattern	Flashing noise
Noise occurs during window washer operation	Washer noise
Friction sound is heard from the areas the wipers contact.	Noise from the wipers
Clicking sound is heard when depressing the brake pedal	Noise from the stop light switch
Others	Static electricity

Result	Proceed to
The noise source cannot be determined.	A
The noise source can be determined.	B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE THE RESPECTIVE NOISE FILTER

4.	CHECK SPEAKER INSTALLATION

(a) Make sure that there are no abnormalities such as looseness or play in the installation of each speaker.

(b) Make sure that there are no abnormalities with each speaker such as the presence of foreign material or tears in the paper of the speaker cone.

Result	Proceed to
No speaker abnormalities	A
Speaker is improperly installed	B
Foreign material is found in the speaker	C
Paper of the speaker cone is torn	D

INSTALL THE SPEAKER CORRECTLY

REMOVE FOREIGN MATTER FROM THE SPEAKER

REPLACE RESPECTIVE PARTS

5.	DETERMINE CAUSE OF NOISE

(a) Using the following diagnosis table, determine the cause of noise.

HINT:

Confirm that noise is not coming from outside the speaker. Make sure to perform this procedure correctly, otherwise the source of noise may be unclear resulting in the cause being misdiagnosed.
When performing the noise prevention procedure, start the inspection from the device with the most noise.
Set the radio to a frequency with no broadcast (untuned) so that the noise is more pronounced and easier to judge.

Symptom table:

Condition under which Noise Occurs	Noise Source
A whirring noise occurs when the air conditioner or heater is operating.	Noise from the blower motor
A click sound occurs when the horn button is pressed, and a buzzing sound is heard when pressed and held.	Noise from the horn
A small buzzing sound occurs until the engine stops.	Ignition noise
Clicking sound occurs synchronously with the turn signal blinking pattern	Flashing noise
Noise occurs during window washer operation	Washer noise
Friction sound is heard from the areas the wipers contact.	Noise from the wipers
Clicking sound is heard when depressing the brake pedal	Noise from the stop light switch
Others	Static electricity

Result	Proceed to
The noise source cannot be determined.	A
The noise source can be determined.	B

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

REPLACE THE RESPECTIVE NOISE FILTER

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Toyota Corolla Cross: In all Modes Noise Occurs in all of the Speakers

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