Schematic Reference: Radio/Audio System Schematics

1

Did you review the Radio/Audio System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Entertainment

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the radio.

Are all of the speakers inoperative?

Go to Step 8

Go to Step 3

1. Use the J 39916-A CD and Cassette Diagnostic Audio Kit in order to isolate the inoperative speaker if necessary.
2. Set the fade and the balance to the inoperative speaker.

Does the speaker operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

Measure the A/C voltage from the speaker output (+) at the inoperative speaker to the speaker output (-) at the inoperative speaker.

Is A/C voltage measured?

Go to Step 11

Go to Step 5

Is the vehicle equipped with U99?

Go to Step 7

Go to Step 6

Test the speaker output circuits to the inoperative speaker for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 9

Test the speaker output circuits to the inoperative speaker for an open, high resistance, or a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 10

Test all speaker output circuits from the radio for a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 9

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

Did you find and correct the condition?

Go to Step 15

Go to Step 12

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

Did you find and correct the condition?

Go to Step 15

Go to Step 13

Inspect for poor connections at the speaker. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 14

Replace the radio. Refer to Radio Replacement .

Did you complete the replacement?

Go to Step 15

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Replace the amplifier. Refer to Radio Speaker Amplifier Replacement .

Did you complete the replacement?

Go to Step 15

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Replace the speaker. Refer to Radio Front Speaker Replacement , Radio Rear Speaker Replacement , Radio Front Side Door Lower Speaker Replacement , Front Upper Speaker Replacement , or Radio Rear Side Door Speaker Replacement .

Did you complete the replacement?

Go to Step 15

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2