|
INSPECTION PROCEDURE 7: Broadcasts can be Heard but Both AM and FM have a lot of Noise.
|
|
|
STEP 1. Check the state of the antenna. Q: Is the mast antenna assembled?
YES:
Go to Step 2. 
NO:
Assemble the mast antenna. Check to see that the noise is gone.
|
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 10  ).
|
STEP 3. Check that the following actions disappear the noise. - Tune to a station with a stronger wave.
- Extend the antenna completely (Mast antenna).
- Adjust the sound quality to suppress high tones.
Q: Is the noise eliminated?
YES:
Consult the radio manufacturer's service centre.
NO:
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?
YES:
Go to Step 5.
NO:
Consult the radio manufacturer's service centre.
|
STEP 5. Check the connection of the antenna plug and radio and tape or CD player. Q: Is the antenna plug thoroughly connected to the radio and tape or 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:
Consult the radio manufacturer's service centre.
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 centre.
NO:
Either repair or replace the antenna assembly. Check to see that the noise is gone.
|