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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:

IG Power Source Circuit
DESCRIPTION The main power source is supplied to the A/C amplifier when the ignition switch is turned to the ON position. The power source is used for operating the A/C amplifier and servo motor, etc. WIRING DIAGRAM INSPECTION PROCEDURE HINT: Start the engine before inspection. Check ...

Inspection
1. INSPECT SEAT HEATER SWITCH LH  Measure the resistance of the seat heater switch when the switch is operated. Resistance If the result is not as specified, replace the switch. HINT: As the dial is being turned, the resistance changes gradually.  Push the seat h ...

Сamshaft timing oil control valve assembly
COMPONENTS ON-VEHICLE INSPECTION 1. INSPECT CAMSHAFT TIMING CONTROL VALVE ASSEMBLY (a) Connect the intelligent tester to the DLC3. (b) Turn the ignition switch to the ON position. (c) Start the engine and warm it up. (d) Select the intelligent tester from the ACTIVE TEST ...

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