Inspection Procedure 10

INSPECTION PROCEDURE 10: Broadcasts Can Be Heard But Both AM And FM Have A Lot Of Noise.

DIAGNOSTIC PROCEDURE

STEP 1. Check the state of the antenna.

Check that there is no damage or crack in the roof antenna.

Q: Is the check result normal?

YES : Go to Step 2.

NO : 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 13). Inspection Procedure 13

STEP 3. Check that the noise fades away by the following actions.

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

Q: Is the noise eliminated?

YES : This diagnosis is complete.

NO : Go to Step 4.

STEP 4. Check that the radio and CD player is correctly grounded

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

Q: Is the radio correctly grounded?

YES : Go to Step 5.

NO : Assemble the radio and CD player into the vehicle.

STEP 5. Check the antenna plug is connected to the radio and CD player.

Q: Is the antenna plug thoroughly connected to the radio and CD player?

YES : Go to Step 7.

NO : Go to Step 6.

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

Q: Is the noise eliminated?

YES : This diagnosis is complete.

NO : 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?

YES : Consult the radio manufacturer's service center.

NO : Repair or replace the roof antenna.