Schematic Reference: Radio/Audio System Schematics

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Verify the fault is present.

Does the system operate normally?

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

Go to Step 3

Ensure that the ignition switch is in the OFF position

Is the clock visible on the display and does the Security LED flash?

Go to Step 4

Go to Step 5

Switch the audio system ON.

Does the radio turn on and operate correctly?

Go to Step 12

Go to Step 5

Check for uneven gaps around the unit and trim.

Is unit properly located in the console?

Go to Step 7

Go to Step 6

Push the unit into the console using firm pressure applied over the removal tool holes.

Is the condition rectified?

Go to Step 19

Go to Step 7

1. Remove the audio system head unit. Refer to Radio Replacement .
2. Using a DMM, measure the battery positive supply voltage at the radio connector. Refer to Measuring Voltage in Wiring Systems.

Is the value as specified?

Within +0.5 V of battery voltage, and above +9.0 V

Go to Step 9

Go to Step 8

1. Check the condition of the RADIO fuse located on the instrument panel fuse and relay panel. Replace if necessary.
2. Check connectors for terminal retention. Repair if necessary.
3. Install the audio system head unit and check operation in radio and CD modes. Refer to Radio Replacement .

Does the unit operate correctly?

System OK

Go to Step 9

1. Remove the audio system head unit. Refer to Radio Replacement .
2. Remove fuse F23 from the instrument panel fuse and relay panel.
3. Using a digital ohmmeter, check continuity of the power supply circuit between the fuse holder and radio connector. Refer to Testing for Continuity in Wiring Systems.

Is the value as specified?

Less than 1 ohms

Go to Step 10

Go to Step 15

Using a digital ohmmeter, check continuity of the ground connection between the radio connector and a known good ground. Refer to Testing for Continuity .

Is the value as specified?

Less than 1 ohms

Go to Step 11

Go to Step 16

Using a digital ohmmeter, check the continuity of the fuse located on the connector at the rear of the audio system head unit. Refer to Testing for Continuity .

Is the value as specified?

Less than 1 ohms

Go to Step 17

Go to Step 18

1. Install the audio system head unit. Refer to Radio Replacement .
2. Turn the ignition to the Accessories position.
3. Switch the audio system ON.
4. Turn the ignition OFF and open the driver door.

Does the audio system also turn OFF?

System OK

Go to Step 13

Check the condition of the IGNITION fuse and the RADIO/CELLULAR PHONE fuse on the instrument panel fuse and relay panel.

Are the fuses OK?

Go to Step 14

Go to Step 18

1. Remove the audio system head unit. Refer to Radio Replacement .
2. Connect a digital voltmeter between the Accessories voltage input at the radio connector and a known good ground.
3. Check the Accessories voltage while turning the ignition between the OFF position and the Accessories position. Refer to Measuring Voltage in Wiring Systems.

Does the specified voltage appear at the Accessories position?

Battery voltage

Go to Step 17

Go to Step 19

Repair an open or short to ground in the battery voltage supply circuit to the radio.

Did you complete the repair?

Go to Step 20

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Repair an open in the radio ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 20

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Replace the appropriate fuses.

Did you complete the repair?

Go to Step 20

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Repair an open or short to ground in the Accessories voltage supply circuit to the radio. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 1