GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 Audio Distortion - One or More Speakers

Audio Distortion - One or More Speakers Front

Step

Action

Values

Yes

No

Schematic Reference: Radio/Navigation System Schematics

Connector End View Reference: Component Connector End Views

1
  1. Turn the ignition and the radio ON.
  2. Inspect for distorted or inoperative front speakers using the fader and the balance controls with all of the sources (AM, FM, tape, CD).

Are the front speakers distorted?

--

Go to Step 2

Go to Step 4

2

Inspect the speaker and the door area for damage, rattles, or vibration.

Is there anything loose or in the way of the speaker causing the distortion?

--

Go to Step 3

Go to Step 4

3

Make the necessary repairs to secure the component causing the distortion.

Did you complete the repair?

--

System OK

--

4
  1. Remove the front speakers and disconnect the speaker connector.
  2. Using an ohmmeter, test the speaker wires for a short to ground.

Does the ohmmeter indicate the specified value?

∞

Go to Step 6

Go to Step 5

5

Repair the short circuit between the front speaker connector and the radio connector.

Did you complete the repair?

--

System OK

--

6

Substitute a known good speaker for the speaker causing the distortion.

Is the distortion eliminated?

--

Go to Step 7

Go to Step 8

7

Replace the speaker.

Did you complete the replacement?

--

System OK

--

8

Replace the cassette radio.

Did you complete the replacement?

--

System OK

--

Audio Distortion - One or More Speakers Rear

Step

Action

Values

Yes

No

Schematic Reference: Radio/Navigation System Schematics

Connector End View Reference: Component Connector End Views

1
  1. Turn the ignition and the radio on.
  2. Inspect for distorted or inoperative rear speakers using the fader and the balance controls with all the of the sources (AM, FM, tape, CD).

Are the rear speakers distorted?

--

Go to Step 2

Go to Step 4

2

Inspect the speakers, the rear deck, and the trunk area for damage, rattles, or vibration.

Is there anything loose or in the way of the speaker causing the distortion?

--

Go to Step 3

Go to Step 4

3

Make the necessary repairs to secure the component causing the distortion.

Did you complete the repair?

--

System OK

--

4
  1. Disconnect the rear speakers.
  2. Using an ohmmeter, test the speaker wires for a short to ground.

Does the ohmmeter indicate the specified value?

∞

Go to Step 6

Go to Step 5

5

Repair the short circuit between the rear speaker connector and the radio connector.

Did you complete the repair?

--

System OK

--

6

Substitute a known good speaker for the speaker causing the distortion.

Is the distortion eliminated?

--

Go to Step 7

Go to Step 8

7

Replace the speaker.

Did you complete the replacement?

--

System OK

--

8

Replace the audio system.

Did you complete the replacement?

--

System OK

--