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Toyota Sienna Service Manual: Poor Sound Quality in All Modes (Low Volume)

Toyota Sienna Service Manual / Navigation / Navigation system / Diagnostic trouble code chart / Poor Sound Quality in All Modes (Low Volume)

INSPECTION PROCEDURE

1 CHECK AUDIO SETTINGS

  1. Set "BASS", "MID" and "TREB" to the initial values and check that sound is normal.

OK: Malfunction disappears.

2 COMPARE WITH ANOTHER VEHICLE OF SAME MODEL

  1. Compare with another vehicle of the same model.
  1. 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

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Screen Flicker or Color Distortion
INSPECTION PROCEDURE 1 CHECK DISPLAY SETTING Enter the display adjustment screen by pressing the "DISPLAY" switch.  Reset display settings (contrast, brightness) and check ...

Map Disc cannot be Inserted
INSPECTION PROCEDURE 1 CHECK RADIO AND NAVIGATION ASSEMBLY Check if a disc is inserted into the MAP disc slot.  Check if "DISC IN" is displayed. OK: "DISC IN&quo ...

Other materials:

On-vehicle inspection
1. CHECK POWER SEAT FUNCTION  Check the basic functions.  Operate the power seat switches and check the following seat functions:  Sliding  Reclining  Front vertical (Driver side seat only)  Lifter (Driver side seat only)  Lumbar suppo ...

Radio Receiver Power Source Circuit
DESCRIPTION This circuit provides power to the radio receiver. WIRING DIAGRAM INSPECTION PROCEDURE 1 INSPECT RADIO RECEIVER ASSEMBLY Disconnect the radio receiver connector. Measure the resistance according to the value in the table below. Standard resistance Measure t ...

Engine immobilizer system
The vehicle’s keys have built-in transponder chips that prevent the engine from starting if a key has not been previously registered in the vehicle’s on-board computer. Never leave the keys inside the vehicle when you leave the vehicle. This system is designed to help prevent vehicle the ...

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