NO.5 SOUND BREAK-UP OR POOR SOUND QUALITY [ENTIRE AUDIO SYSTEM]
id0903e2818300
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5 |
Sound break-up or poor sound quality |
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Possible DTC |
Using the M-MDS |
U3000:09 |
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Without using M-MDS (On-board diagnostic test mode) |
09:Er21 |
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Possible cause
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• Electronic jamming from outside, or inferior condition of broadcasting station radio wave
• Tuning error with radio station
• Poor connection of music device
• Volume adjustment of music device is at minimum
• Improper speaker installation
• Vibration of door trim and/or package trim
• Speaker malfunction (e.g., any foreign material, broken)
• Audio unit malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Verify the malfunction symptom.
• Is there sound distortion?
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Yes
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Go to the next step.
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No
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Go to Step 6.
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2
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• Does the sound distortion occur only while in radio mode?
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Yes
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Go to the next step.
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No
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Go to Step 5.
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3
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• Can the location where the sound distortion occurs be specified?
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Yes
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The system is normal. Explain to the customer that the noise is caused by radio wave disturbances or broadcast wave conditions from the outside.
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No
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Go to the next step.
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4
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• Does the sound distortion occur after selecting a radio station?
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Yes
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The system is normal. Explain to the customer that the sound distortion is caused by a tuning error with the radio station.
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No
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Go to the next step.
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5
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• Does the AUX mode operate?
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Yes
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Verify the connection condition and volume of the music device. If the connection condition is normal and sound is output, go to the next step.
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No
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Go to the next step.
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6
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• Inspect the sound while adjusting the sound volume.
• Is there broken sound or poor sound quality between “30” and “40”?
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Yes
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Go to the next step.
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No
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The system is normal.
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7
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• Inspect the BASS/TREB.
• Is there poor sound quality at “-3 —+3” of “BASS/TREB”?
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Yes
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Go to the next step.
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No
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If there is broken sound at “-6 —+6” of BASS/TREB with the maximum volume, the system is normal.
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8
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• Identify the speaker with broken sound by adjusting BAL/FADE.
• Is the speaker installed properly?
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Yes
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Go to the next step.
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No
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Install the speaker properly.
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9
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• Remove the speaker.
• Is there any foreign material or damage on the speaker?
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Yes
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Repair or replace the suspect speaker.
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No
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Go to the next step.
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10
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• Inspect the sound again.
• Is there broken sound?
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Yes
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Go to the next step.
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No
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Inspect the vibration from the door trim and/or package trim. Repair or replace the suspect trim as necessary.
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11
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• Replace with the speaker known to be good. (e.g., swap right and left speakers)
• Does the broken sound appear at the same location?
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Yes
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With CD changer
• Go to the next step.
With CD player
• If noise occurs from the speaker of a specific channel, or the volume is minimized and the noise occurs:
• If noise occurs from the speaker of two or more channels or the volume is minimized and the noise dose not occurs:
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No
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Replace the speaker.
(See TWEETER REMOVAL/INSTALLATION.)
(See REAR CENTER SPEAKER REMOVAL/INSTALLATION.) (4SD)
(See BASS-BOX REMOVAL/INSTALLATION.) (5HB)
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12
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• Verify that all of the audio unit reset conditions for the customer's audio unit are met.
• Are all of the audio unit reset conditions for the customer's audio unit met?
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Yes
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Perform the audio unit reset.
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No
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Replace the audio unit.
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