NO.6 VOLUME INCREASES/DECREASES WHILE DRIVING THE VEHICLE [ENTIRE AUDIO SYSTEM]

id0903e2818500

6

Sound becomes loud or weak while driving the vehicle/Possible DTC: —
Troubleshooting hints
•  Audio unit/car-navigation unit malfunction (without Bose®)
•  Audio amplifier malfunction (with Bose®)
Note
•  Inspect the ALC function (with Bose®)/Audio pilot function (with Bose®) while driving the vehicle with playing the CD, etc.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Does the ALC (Without Bose®)/Audio Pilot function (With Bose®) turn on?
Yes
Go to the next step.
No
Without Bose®:
•  Replace the audio unit (with audio system).
•  Replace the car-navigation unit (with car-navigation system).
With Bose®:
•  Replace the audio amplifier.
2
•  Turn the ALC (Without Bose®)/Audio Pilot function (With Bose®).
•  Does the sound change while driving the vehicle?
Yes
Without Bose®:
•  Replace the audio unit (with audio system).
•  Replace the car-navigation unit (with car-navigation system).
With Bose®:
Replace the audio amplifier.
No
The system is normal.
Explains the ALC (Without Bose®)/Audio Pilot function (with Bose®) to the customer.