Schematic Reference: Radio/Navigation System Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the radio.
3. Insert the tape or CD from the J 39916-A CD and Cassette Diagnostic Audio Kit.
4. Adjust the volume to the lowest setting that can be heard.

Is the lowest setting too loud ?

Go to Step 3

Go to Audio System Troubleshooting Hints

1. Install a scan tool.
2. Turn ON the ignition with the engine OFF.
3. With a scan tool, observe the Amplifier parameter in the Radio data list.

Does the scan tool display Present?

Go to Step 4

Go to Step 5

Compare the volume to a similar vehicle with the same audio system.

Are both vehicles the same?

System OK

Go to Step 6

1. Turn OFF the ignition.
2. Remove the radio.
3. Test the amp sense circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 8

Go to Step 7

Replace the radio. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2