NO.6 VOLUME INCREASES/DECREASES WHILE DRIVING THE VEHICLE [ENTIRE AUDIO SYSTEM]
id0903e2818500
6 |
Volume increases/decreases while driving the vehicle |
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---|---|---|
Possible DTC |
— |
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Possible cause
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• Electronic jamming from outside, or inferior condition of broadcasting station radio wave
• Sound level difference between audio modes
• Mis-operation of steering switches
• Audio unit malfunction (without Bose®)
• Audio amplifier malfunction (with Bose®)
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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---|---|---|---|
1
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• Does the audio volume change 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 3.
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||
2
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• Can the location where the audio volume change 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 Step 5.
|
||
3
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• Does the audio volume change when changing the mode?
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Yes
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The system is normal. Explain to the customer that the volume change is caused by sound level differences between audio modes.
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No
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Go to the next step.
|
||
4
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• Do the steering switches operate?
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Yes
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The system is normal. Explain to the customer that the volume change is caused by a mis-operation of the steering switches.
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No
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Go to the next step.
|
||
5
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• Does the ALC (Without Bose®)/AudioPilot®2 function (With Bose®) turn on?
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Yes
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Go to the next step.
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No
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Without Bose®:
• Replace the audio unit.
With Bose®:
• Replace the audio amplifier.
|
||
6
|
• Turn off the ALC (Without Bose®)/AudioPilot®2 function (With Bose®).
• Does the sound change while driving the vehicle?
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Yes
|
With CD changer
• Go to the next step.
With CD player
• Replace the audio unit.
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No
|
The system is normal.
Explains the ALC (Without Bose®)/AudioPilot®2 function (with Bose®) to the customer.
|
||
7
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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
|
Replace the audio unit.
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