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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:

Selecting, fast-forwarding and reversing tracks/files/songs
Selecting a track/file/song Press the “” or “” button on “SEEK•TRACK” or turn the “TUNE•SCROLL” knob to select the desired track/file/song number. To fast-forward or reverse, press and hold the “” or “” button on “SEEK•TRACK”. ...

Data list / active test
1. DATA LIST HINT: Using the DATA LIST displayed on the intelligent tester, you can read the value of the switch, sensor, actuator, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the labor time.  Connect the intelligent tes ...

Rear Air Mix Damper Control Servo Motor Circuit
DESCRIPTION The rear air mix control servo motor (water valve servo motor) is controlled by the A/C amplifier. The rear air mix control servo motor moves the air mix damper by rotating (normal, reverse) with electrical power from the A/C amplifier. WIRING DIAGRAM INSPECTION PROCEDURE ...

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