PROCEDURE
1. | CHECK NOISE CONDITION |
(a) Check from which direction the noise comes (front left or right, or rear left or right).
OK:
The location of the noise source can be determined.
NG | GO TO STEP 3 |
|
2. | CHECK SPEAKERS |
(a) Check the installation condition of the speaker units that are located near the noise source and that there are no cracks, scratches, deformation or other failures.
Result | Proceed to |
---|---|
No malfunction is found. | A |
A speaker is installed incorrectly. | B |
Foreign matter is in a speaker. | C |
A speaker cone paper is broken. | D |
A | GO TO STEP 3 |
B | REINSTALL SPEAKER |
C | REMOVE FOREIGN MATTER |
D | REPLACE SPEAKER |
3. | CHECK NOISE CONDITIONS |
(a) Check the noise condition.
HINT:
The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed and wired correctly.
Condition under which Noise Occurs | Noise Source |
---|---|
Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped. | Generator |
Noise occurs during A/C or heater operation. | Blower motor |
Noise occurs when the horn switch is pressed and released or when pressed and held. | Horn |
Noise occurs synchronously with the turn signal blinking pattern. | Flasher |
Noise occurs during window washer operation. | Washer |
Noise occurs during wiper operation. | Wiper |
Noise occurs when the brake pedal is depressed. | Stop light switch |
Others | Static electricity |
HINT:
Result | Proceed to |
---|---|
The noise source cannot be determined. | A |
The noise source can be determined. | B |
A | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B | REPAIR OR REPLACE NOISE SOURCE |