Inspection Procedure 6: Broadcasts can be Heard but Both LW/MW/FM have a lot of Noise.


DIAGNOSIS PROCEDURE

STEP 1. Check the state of the antenna.


Q. Is the antenna assembled?

Go to Step 2.

Repair or replace the roof antenna.

STEP 2. Check that the noise occur when the engine is stopped or the engine is running.


Q. Does noise occur when the engine is stopped or the engine is running?

When the engine is stopped : Go to Step 3.

When the engine is running : Check the vehicle’s noise suppressor (Refer to Inspection Procedure 8 ).

STEP 3. Check that the following actions disappear the noise.


(1)Tune to a station with a stronger wave.
(2)Adjust the sound quality to suppress high tones.

Q. Is the noise eliminated?

This diagnosis is complete.

Go to Step 4.

STEP 4. Check that the radio is correctly earthed


The radio is connected to the earth with an assembling screw.

Q. Is the radio correctly earthed?

Go to Step 5.

Assemble the radio with CD player into the vehicle.

STEP 5. Check the connection of the antenna plug and radio with CD player.


Q. Is the antenna plug thoroughly connected to the radio with CD player?

Go to Step 7.

Go to Step 6.

STEP 6. Check that the noise is eliminated when the antenna plug is properly attached.


Q. Is the noise eliminated?

This diagnosis is complete.

Go to Step 7.

STEP 7. Check that the antenna is in good condition and is it properly mounted.


Q. Is the antenna in good condition and is it properly mounted?

Consult the radio manufacturer’s service centre.

Repair or replace the roof antenna.