Toyota 4Runner: Noise Occurs
PROCEDURE
|
1. |
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 | .gif) |
GO TO STEP 3 |
|
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|
2. |
CHECK SPEAKERS |
(a) Check the installation conditions 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 objects are in the speaker |
C |
|
A speaker cone paper is broken |
D |
| B | |
REINSTALL SPEAKER |
| C | |
REMOVE FOREIGN OBJECT |
| 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:
- In the left column of the table, find the situation that matches the customer's complaint. Then, in the right column, find the part that is causing the noise. Check the respective noise filter.
- To save time and avoid a misdiagnosis, first make sure that the noise is not coming from outside the vehicle.
- Troubleshoot noises in descending order of loudness.
- Setting the radio to a frequency where no signal is received may make recognition of the noise problem easier.
OK:
The noise source cannot be determined.
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE NOISE SOURCE |
Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast
cannot be Added into Memory
CAUTION / NOTICE / HINT
NOTICE:
Some satellite radio broadcasts require payment. A contract must be
made between a satellite radio company and the user. If the contract expires,
it w ...
No Sound can be Heard from Speakers
PROCEDURE
1.
CHECK AUDIO SETTINGS
(a) Set volume, fader and balance to the initial values and check that sound
is normal.
OK:
Audio system returns to normal.
HI ...
Other materials about Toyota 4Runner:
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE COOLER BRACKET
(a) Detach the clamp.
(b) Remove the screw and cooler bracket.
2. REMOVE MAGNET CLUTCH ASSEMBLY
(a) Clamp the cooler compressor in a vise.
(b) Using SST, hold the magnet clutch hub.
SST: 07112-76060
( ...
Operation Check
OPERATION CHECK
1. INSPECT DRIVER SIDE SEAT BELT WARNING LIGHT
(a) Turn the ignition switch to ON.
(b) When the driver seat belt is not fastened, check that the seat belt warning
light on the combination meter assembly blinks for 6 seconds. After 1.8 seco ...
0.008