For 1990-2009 cars

### Speakers-Distortion

Important: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent Conditions and Poor Connections .

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Turn ON the radio.
2. Adjust the volume to the lowest setting that can be heard.

Is the lowest audible setting too loud?

--

Go to Step 2

System OK

2 | Compare the volume to a similar vehicle with the same audio system. Are both vehicles the same? | -- | System OK | Go to Step 5
3 | Test the amplifier sense signal circuit for an open or high resistance. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 4
4 |

1. Turn OFF the ignition.
2. Disconnect the audio amplifier sensor signal circuit and ground.
3. Connect a 3-amp fused jumper between the amplifier sensor signal circuit and ground.
4. Turn ON the ignition, with the engine OFF.

Does the scan tool indicate that the audio amplifier is present?

--

Go to Step 8

Go to Step 5

5 | Inspect for poor connections at the harness connector of the radio. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the audio amplifier. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8
7 | Replace the radio. Did you complete the replacement? | -- | Go to Step 9 | --
8 | Replace the audio amplifier. Did you complete the replacement? | -- | Go to Step 9 | --
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2