Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM10000000271XA
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): In all Modes Noise Occurs in all of the Speakers; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

In all Modes Noise Occurs in all of the Speakers

PROCEDURE

1.

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
B

INSTALL THE SPEAKER CORRECTLY
C

REMOVE FOREIGN MATTER FROM THE SPEAKER
D

REPLACE RESPECTIVE PARTS
A

2.

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
A

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL

B

REPLACE THE RESPECTIVE NOISE FILTER