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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:

Inspection
1. INSPECT PRELOAD (a) Using SST(s) and a torque wrench, check the initial torque within the backlash range. SST 09326-20011 Torque: 0.9 to 1.4 N*m (9 to 14 kgf*cm, 8.0 to 12.4 in.*lbf) HINT: Use a torque wrench with a fulcrum length of 160 mm (6.30 in.). (b) Using SST(s) and a torque w ...

Installation
1. INSTALL CENTER REAR SEAT LAP TYPE BELT ASSEMBLY (for 8-Passenger) HINT: Refer to the instructions for reassembly of the rear No. 1 seat assembly (for center seat).  Install the center rear seat lap type belt assembly with the bolt. Torque: 42 N*m (430 kgf*cm, 31 ft.*lbf) 2. I ...

Rear Air Mix Damper Position Sensor Circuit
DESCRIPTION This sensor detects the position of the rear air mix control servo motor (water valve servo motor) and sends the appropriate signals to the A/C amplifier. The position sensor is built in the rear air mix control servo motor (water valve servo motor). The position sensor's r ...

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