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:
Using the interior lights
Interior lights list
1. Rear interior light
2. Front interior light/front personal lights
3. Shift lever light (when the engine switch is in the “ACC” or “ON” position
[without a smart key system] or “ENGINE START STOP” switch is in ACCESS ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU
HINT:
Inspect the connector from the back side.
(a) Disconnect the F7 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol)
W ...
0.0065