Inspection Procedure 17

INSPECTION PROCEDURE 17: Poor Reception.

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 to see if inspections are taking place is an area exposed to special electric fields.

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

YES : Go to Step 3.

NO : Go to Step 4.

STEP 3. Relocate and check.

Automatically receive in 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 : Move the vehicle to check the trouble symptom.

NO : Go to Step 4.

STEP 4. Tune then check.

Q: Did the sensitivity improve after tuning?

YES : This diagnosis is complete.

NO : Go to Step 5.

STEP 5. Check with several broadcasting stations.

NOTE: Multipath noise and fading noise: Because the frequency of FM waves is extremely high, it is highly susceptible to effects from geological formations and buildings. These effects disrupt the broadcast signal and obstruct reception in several ways.

Multipath noise
- This describes 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).

Fading noise
- This is a buzzing noise that occurs when the broadcast beam is disrupted by obstructing objects and the signal strength fluctuates intricately within a narrow range.

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

YES : Check that a poor reception is resolved.

NO : Go to Step 6.

STEP 6. Check the antenna plug connection 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 : Thoroughly connect the antenna plug and the radio and CD player.

STEP 7. Check by temporarily replacing the radio and CD player.

Q: Does the other radio and CD player work normally?

YES : Either repair or replace the radio and CD player.

NO : Repair or replace the roof antenna.