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

Does the rear window have an after-market tint material fitted?

Go to Step 19

Go to Step 4

1. Turn ON the ignition.
2. Select a known weak AM station.

Is the AM signal received?

Go to Step 5

Go to Step 15

Is the AM signal noisier than usual?

Go to Step 11

Go to Step 6

1. Select a known weak FM station.
2. Check that the rear window demister is OFF.

Is the FM signal received?

Go to Step 10

Go to Step 7

Inspect the FM antenna coil for damage.

Is the FM antenna coil damaged?

Go to Step 20

Go to Step 8

Ensure that the FM antenna coil connectors are securely connected at each side of the rear window.

Are the FM antenna coil connectors securely connected?

Go to Step 9

Go to Step 21

1. Remove the rear quarter panel trim. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.
2. Inspect the antenna amplifier module and cable connecting the FM antenna coil to the module for damage.

Is either the cable or module damaged?

Go to Step 21

Go to Step 22

Turn the rear window demister ON.

Did the FM reception weaken or did the background noise increase?

Go to Step 24

System OK

1. Remove the rear quarter panel trim. Refer to Rear Quarter Trim Panel Replacement in Interior Trim.
2. The antenna amplifier module ground path is through the mounting bolts. Check that the mounting bolts are correctly installed and at the correct torque specification.

Is the value as specified?

6-8 N·m

Go to Step 12

Go to Step 25

Check that the antenna amplifier module connectors are securely connected.

Are the antenna amplifier module connectors securely connected?

Go to Step 13

Go to Step 21

Check that the antenna coax cable between the antenna amplifier module and the radio cradle is not damaged and is securely connected.

Is the cable damaged or not securely connected?

Go to Step 26

Go to Step 14

1. Replace the antenna amplifier module. Refer to Radio Antenna Module Replacement .
2. Check the audio system for correct operation.

Does the audio system operate correctly?

Go to Step 30

Go to Step 27

1. Remove the audio system head unit. Refer to Radio Replacement .
2. Check that the antenna connector is plugged into the radio cradle properly.
3. From inside the vehicle, remove the passenger's side hinge pillar trim assembly to gain access to the antenna connector. Refer to Body Hinge Pillar Trim Panel Replacement in Interior Trim.
4. Check that the antenna extension lead is correctly connected to the front antenna lead.
5. Install the audio system head unit. Refer to Radio Replacement .
6. Switch the audio system ON.

Has the signal strength improved?

Go to Step 26

Go to Step 16

1. Remove the audio system head unit. Refer to Radio Replacement .
2. Disconnect the antenna connector from the rear of the radio cradle.
3. Using a digital ohmmeter, check the resistance between ground and the centre core of the antenna coax cable.

Is the reading as specified?

10 ohms

Go to Step 17

Go to Step 28

1. Remove the rear quarter panel trim. Refer to Section Rear Quarter Trim Panel Replacement in Interior Trim.
2. Check that the antenna amplifier module connectors are securely connected to the module.

Are all antenna amplifier module connectors securely connected?

Go to Step 18

Go to Step 21

1. Disconnect the antenna amplifier module +12 volt supply connector from the module.
2. Turn the radio ON.
3. Using a DMM, check the antenna module supply voltage at the connector. Refer to Measuring Voltage in Wiring Systems.

Is the voltage as specified?

Battery Voltage

Go to Step 23

Go to Step 29

After-market window tint material is not recommended as they can reduce radio reception. Replace the rear window. Refer to Rear Window Replacement in Stationary Windows.

Did you complete the repair?

Go to Step 30

--

Repair the antenna coil using an after-market repair kit.

Did you complete the repair?

Go to Step 30

--

Ensure that the connectors are securely connected.

Did you complete the repair?

Go to Step 30

--

Replace the damaged antenna amplifier module or cable. Refer to Radio Antenna Module Replacement or Radio Antenna Cable Extension Cable Replacement .

Did you complete the repair?

Go to Step 30

--

Replace the antenna amplifier module. Refer to Radio Antenna Module Replacement .

Did you complete the repair?

Go to Step 30

--

Many broken segments in the antenna coil. Replace the rear window. Refer to Rear Window Replacement in Stationary Windows.

Did you complete the repair?

Go to Step 30

--

Torque the mounting bolts to the correct specification. If reception does not improve, replace the antenna amplifier module. Refer to Radio Antenna Module Replacement .

Did you complete the repair?

Go to Step 30

--

Secure cable or replace if damaged.

Did you complete the repair?

Go to Step 30

--

1. Install the original antenna amplifier module. Refer to Radio Antenna Module Replacement .
2. Replace the audio system head unit. Refer to Radio Replacement .

Did you complete the repair?

Go to Step 30

--

Repair or replace defective coax cable. Refer to Radio Antenna Cable Extension Cable Replacement .

Did you complete the repair?

Go to Step 30

--

Repair the antenna amplifier module battery positive feed circuit. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 30

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2