Inspection Procedure 20

INSPECTION PROCEDURE 20: Radio: Poor reception.

DIAGNOSIS

STEP 1. Check to see if inspections are taking place in an area exposed to special electric fields.

Q. Are inspections taking place under special electric field conditions? (underground garage, inside a building, etc.)?

YES Go to Step 2.

NO Go to Step 3.

STEP 2. Move the vehicle and check the radio.

Move the vehicle to a good reception area that is not exposed to special electric fields.

Q. Is reception of the strongest radio frequency possible within the area?

YES The procedure is complete.

NO Go to Step 3.

STEP 3. Tune the radio, and then check it.

Q. Did the sensitivity improve after tuning?

YES The procedure is complete.

NO Go to Step 4.

STEP 4. Check with several broadcasting stations.

NOTE:
Two types of noise are addressed in this procedure, multipath and fading noise. The frequency of FM waves is extremely high. This makes them susceptible to effects from geological formations and buildings. These effects disrupt the broadcast signal and obstruct reception in many ways.

- Multipath noise is the echo that occurs when the broadcast signal is reflected by a large obstruction and enters the receiver with a slight time delay relative to the direct signal (repetitious buzzing).
- A fading or buzzing noise may occur when the broadcast beam is disrupted by obstructing objects and the signal strength fluctuates within a narrow range.

Q. Is the abnormality in reception generated only within a certain range?

YES The procedure is complete.

NO Go to Step 5.

STEP 5. Check the antenna plug connection to the radio and CD player or radio and CD player with CD changer.

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

YES Go to Step 6.

NO Thoroughly connect the antenna plug and the radio and CD player or radio and CD player with CD changer.

STEP 6. Check by replacing radio and CD player or radio and CD player with CD changer.

Q. Do the other radio and CD player or radio and CD player with CD changer work normally?

YES Replace the original radio and CD player or radio and CD player with CD changer. Check that a poor reception is resolved.

NO Either repair or replace the antenna assembly.