Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

GO TO STEP 3

OK

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

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

A

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 will not be p ...

No Sound can be Heard from Speakers
PROCEDURE 1. CHECK AUDIO SETTINGS (a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal. OK: A ...

Other materials:

Rear Occupant Classification Sensor LH Collision Detection (B1787)
DESCRIPTION DTC B1787 is set when the occupant detection ECU receives a collision detection signal, which is sent by the occupant classification sensor rear LH when an accident occurs. DTC B1787 is also set when the front seat with adjuster frame assembly RH is subjected to a strong impact, ...

Short in Curtain Shield Squib RH Circuit (B1830/57-B1833/57)
DESCRIPTION The front passenger side curtain shield squib circuit consists of the airbag sensor assembly and the curtain shield airbag assembly RH. The circuit signals the SRS to deploy when airbag deployment conditions are met. These DTCs are set when a malfunction is detected in the front pas ...

Fail-safe Chart
FAIL-SAFE CHART 1. FAIL SAFE OPERATION If there is a problem with any sensor signals or hydraulic brake booster systems, the skid control ECU prohibits the power supply to the actuator in the hydraulic brake booster and informs the ECM of VSC system failure. The hydraulic brake b ...

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