Noise Occurs

NAVIGATION: NAVIGATION SYSTEM (w/o USB Audio System): Noise Occurs
- Noise Occurs

INSPECTION PROCEDURE

PROCEDURE

1. NOISE CONDITION

(a) Check from which direction the noise comes.

Front No. 1 speaker assembly LH

Front No. 1 speaker assembly RH

Front No. 2 speaker assembly LH

Front No. 2 speaker assembly RH

Rear No. 1 speaker assembly LH*

Rear No. 1 speaker assembly RH*

*: except Regular Cab

OK:

The location of the noise source can be determined.

NG -- CHECK NOISE CONDITIONS
OK -- Continue to next step.

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 malfunctions.

Result





C -- REPLACE SPEAKER

B -- REMOVE FOREIGN OBJECT

A -- REINSTALL SPEAKER
D -- Continue to next step.

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.





HINT
* In the left column of the chart, find the situation that matches the customer complaint. Then, in the right column, find the part that is causing the noise. Check the noise filter on or for the part.
* To save time and avoid a misdiagnosis, first make sure that the noise is not coming from outside the vehicle.
* Noise should be removed 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.

NG -- REPAIR OR REPLACE NOISE SOURCE

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table