NO.5 SOUND BREAK-UP OR POOR SOUND QUALITY [ENTIRE AUDIO SYSTEM]

id0903e2818300

5 | Sound break-up or poor sound quality
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Possible DTC | Using the M-MDS | U3000:09
Without using M-MDS (On-board diagnostic test mode) | 09:Er21
Possible cause | • 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 • Audio amplifier malfunction (with Bose®)

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | • Verify the malfunction symptom. • Is there sound distortion? | Yes | Go to the next step.
No | Go to Step 6.
2 | • Does the sound distortion occur only while in radio mode? | Yes | Go to the next step.
No | Go to Step 5.
3 | • Can the location where the sound distortion occurs be specified? | Yes | The system is normal. Explain to the customer that the noise is caused by radio wave disturbances or broadcast wave conditions from the outside.
No | Go to the next step.
4 | • Does the sound distortion occur after selecting a radio station? | Yes | The system is normal. Explain to the customer that the sound distortion is caused by a tuning error with the radio station.
No | Go to the next step.
5 | • Does the AUX mode operate? | Yes | 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.
No | Go to the next step.
6 | • Inspect the sound while adjusting the sound volume. • Is there broken sound or poor sound quality between “30” and “40”? | Yes | Go to the next step.
No | The system is normal.
7 | • Inspect the BASS/TREB. • Is there poor sound quality at “-3 —+3” of “BASS/TREB”? Note • The speaker from which the sound is not emitted is specified using by that the speaker voice changes. | Yes | Go to the next step.
No | If there is broken sound at “-6 —+6” of BASS/TREB with the maximum volume, the system is normal.
8 | • Identify the speaker with broken sound by adjusting BAL/FADE. • Is the speaker installed properly? | Yes | Go to the next step.
No | Install the speaker properly.
9 | • Remove the speaker. • Is there any foreign material or damage on the speaker? | Yes | Repair or replace the suspect speaker.
No | Go to the next step.
10 | • Inspect the sound again. • Is there broken sound? | Yes | Go to the next step.
No | Inspect the vibration from the door trim and/or package trim. Repair or replace the suspect trim as necessary.
11 | • Replace with the speaker known to be good. (e.g., swap right and left speakers) • Does the broken sound appear at the same location? | Yes | Without Bose® • Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.) With Bose® • If noise occurs from the speaker of a specific channel, or the volume is minimized and the noise occurs: ― Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.) • If noise occurs from the speaker of two or more channels or the volume is minimized and the noise dose not occurs: ― Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
No | Without Bose® • Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.) (6 speaker type) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) With Bose® • Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See FRONT SPEAKER REMOVAL/INSTALLATION.) (See CENTER SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.)