6

Volume increases/decreases while driving the vehicle / Possible DTC: —

Troubleshooting hints

• Audio unit malfunction (without Bose)

• Audio amplifier malfunction (with Bose)

NOTE:

• Inspect the ALC function (without Bose) or Audio Pilot function (with Bose) while driving the vehicle and playing a CD.

STEP

INSPECTION

ACTION

1

• Does the ALC function or AudioPilot function turn on?

Yes

Go to the next step.

No

Without Bose

• Replace the audio unit.

  (See CENTER PANEL UNIT REMOVAL/INSTALLATION.)

  (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

  (See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)

With Bose

• Replace the audio amplifier if the following occurs:

  (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)

• The volume changes suddenly.

2

• Turn the ALC function or AudioPilot function off.

• Does the sound change while driving the vehicle?

Yes

Replace the audio unit.

(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)

(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)

No

The system is normal. Explain the ALC function to the customer.