Schematic Reference: Radio/Audio System Schematics

Connector End View Reference: Entertainment Connector End Views

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

Go to Step 2

Go to Diagnostic Starting Point - Entertainment

1. Turn ON the ignition with the engine off.
2. Turn on the radio.
3. Test for antenna amplifier voltage at the radio.

Did you measure ignition positive voltage?

Go to Step 3

Go to Step 8

Important: Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.

1. Disconnect the antenna lead-in connector from the radio receiver.
2. Test the resistance between the center conductor of the antenna lead-in connector and a good ground.

Did you measure less than 0.50 ohms?

Go to Step 4

Go to Step 6

Important: Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.

Test the radio ground circuit for resistance greater than 0.50 ohms.

Was the measurement greater than 0.50 ohms?

Go to Step 10

Go to Step 5

1. Turn ON the ignition with the engine off.
2. Turn on the radio.
3. Test for radio antenna amplifier voltage at the antenna. Refer to Radio Antenna Replacement for access.

Did you measure ignition positive voltage?

Go to Step 7

Go to Step 9

Test the resistance at the antenna between the antenna signal circuit and a good ground.

Did you measure less than 0.50 ohms?

Go to Step 9

Go to Step 12

Replace the antenna. Refer to Radio Antenna Replacement .

Did the reception improve?

Go to Step 13

Go to Step 8

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 13

Go to Step 11

Repair the open in the antenna extension cable. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 13

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

Did you complete the repair?

Go to Step 13

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Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 13

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Replace the antenna. Refer to Radio Antenna Replacement .

Did you complete the repair?

Go to Step 13

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Operate the system in order to verify the repair

Did you correct the condition?

System OK

Go to Step 2