Lexus IS250 IS220d GSE20 ALE20 - AUDIO / VISUAL

INSPECTION PROCEDURE

NOISE CONDITION

CHECK SPEAKERS

CHECK NOISE CONDITIONS

AUDIO AND VISUAL SYSTEM - Noise Occurs

INSPECTION PROCEDURE

1.NOISE CONDITION

Check in which direction the noise comes from (front left or right, or rear left or right).


Check in which direction the noise comes from.

  • OK:
  • The location of the noise source can be determined.
NG
Go to step 3
OK
2.CHECK SPEAKERS

Check the installation conditions of the speaker units that are located near the noise source and that there are no cracks, scratches, deformation, or other failures.

  • Result:
  • ConditionProceed to
    A speaker is installed incorrectlyA
    Foreign objects are in the speakerB
    A speaker cone paper is brokenC
    No malfunction is foundD
A
REINSTALL SPEAKER
B
REMOVE FOREIGN OBJECT
C
REPLACE SPEAKER
D
3.CHECK NOISE CONDITIONS

Check the noise condition.

  • 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.
Conditions under which noise occursNoise Source
Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped.Generator
Noise occurs during A/C or heater operation.Blower motor
Noise occurs when the vehicle accelerates rapidly on an unpaved road or after the engine switch is turned on (IG).Fuel pump
Noise occurs when the horn switch is pressed and released or when pressed and held.Horn
Noise occurs synchronously with the blink of the turn signal.Flasher
Noise occurs during window washer operation.Washer
Noise occurs while the engine is running, and continues even after the engine is stopped.Water temperature sensor
Noise occurs during wiper operation.Wiper
Noise occurs when the brake pedal is depressed.Stop light switch
OthersStatic electricity
  • HINT:
In the chart's left column, find the situation that matches the customer's complaint. Then, in the right column, find the part that is causing the noise. Check the noise filter on or for the part.
To save time and avoid a misdiagnosis, first make sure that the noise is not coming from outside the vehicle.
Noise should be removed in descending order of loudness.
Setting the radio to a frequency where no signal is received may make recognition of the noise problem easier.
  • OK:
  • The noise source can be determined.
NG
REPAIR OR REPLACE NOISE SOURCE
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
LEXUS IS250, IS220d / GSE20 ALE20
AUDIO / VISUAL
Lexus IS250 IS220d GSE20 ALE20
AUDIO AND VISUAL SYSTEM