Schematic Reference: Radio/Audio System Schematics

1

Did you perform the Radio/Audio System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Turn on the radio.
4. With a scan tool, perform a speaker test on each speaker.

Does each speaker operate properly?

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

Go to Step 3

Are all of the speakers inoperative?

Go to Step 6

Go to Step 4

1. Disconnect the inoperative speaker.
2. Measure the A/C voltage between the speaker connector terminals of the inoperative speaker.

When music is playing is any voltage measured?

Go to Step 8

Go to Step 5

Test the output circuits to the appropriate 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 11

Go to Step 7

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

Did you find and correct the condition?

Go to Step 11

Go to Step 7

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 11

Go to Step 9

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 11

Go to Step 10

Important:: Perform the set up procedure for the radio.

Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 11

--

Replace the speaker. Refer to the following:

Did you complete the replacement?

Go to Step 11

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Schematic Reference: Radio/Audio System Schematics

1

Did you perform the Radio/Audio System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Turn on the radio.
4. With a scan tool, perform a speaker test on each speaker.

Does each speaker operate properly?

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

Go to Step 3

Are all of the speakers inoperative?

Go to Step 6

Go to Step 4

1. Disconnect the inoperative speaker.
2. Measure the A/C voltage between the speaker connector terminals of the inoperative speaker.

When music is playing is any voltage measured?

Go to Step 13

Go to Step 5

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

Did you find and correct the condition?

Go to Step 17

Go to Step 12

Test the battery positive voltage circuit to the audio amplifier for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 7

Test the ground circuit to the audio amplifier for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 8

Test the 14 V ref circuit to the audio amplifier for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 9

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

Did you find and correct the condition?

Go to Step 17

Go to Step 10

1. Turn ON the ignition, with the engine OFF.
2. Turn on the radio.
3. Measure AC voltage from any speaker output (+) circuit to the corresponding speaker output (-) circuit, at the audio amplifier.

Is any voltage measured?

Go to Step 12

Go to Step 11

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 17

Go to Step 14

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 17

Go to Step 15

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 17

Go to Step 16

Important:: Perform the set up procedure for the radio.

Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 17

--

Replace the amplifier. Refer to Radio Speaker Amplifier Replacement .

Did you complete the repair?

Go to Step 17

--

Replace the speaker. Refer to the following:

Did you complete the replacement?

Go to Step 17

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2