Toyota 4Runner: Poor Sound Quality in All Modes (Low Volume)

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Audio / Video / Audio And Visual System / Poor Sound Quality in All Modes (Low Volume)

PROCEDURE

1.	CHECK AUDIO SETTINGS

(a) Set "Treble", "Mid" and "Bass" to the initial values and check that sound is normal.

OK:

Malfunction disappears.

HINT:

Sound quality adjustment measures vary according to the type of amplifier.

END

2.	COMPARE WITH ANOTHER VEHICLE OF SAME MODEL

(a) Compare with another vehicle of the same model which does not have trouble to see if there is any difference in the sound quality.

OK:

No difference is found.

END

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Screen Flicker or Color Distortion

PROCEDURE 1. CHECK DISPLAY SETTING (a) Reset display settings (contrast, brightness) and check that the screen appears normal. OK: The display returns to normal. ...

Voice Guidance does not Function

PROCEDURE 1. CHECK VOICE GUIDANCE SETTING (a) Display the "Voice Settings" screen. (b) Check if the "Voice Recognition Prompts" is not "Off& ...

Other materials about Toyota 4Runner:

On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY LH (VEHICLE NOT INVOLVED IN COLLISION) ...

Diameter of the Tire is not Uniform (C1337)
DESCRIPTION The skid control ECU measures the speed of each wheel by receiving signals from the speed sensors. These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must indicate the same speed. ...