Toyota Sienna Service Manual: Poor Sound Quality in All Modes (Low Volume)
INSPECTION PROCEDURE
1 CHECK AUDIO SETTINGS
- 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
- Compare with another vehicle of the same model.
- 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:
Operation check
1. NOTICE WHEN CHECKING THE FOLLOWING
Power door lock/unlock function:
The wireless door lock control function operates
only when the following 3 conditions are met:
No key is inserted in the ignition key cylinder.
All the doors are closed.
The power door lock sys ...
On-vehicle inspection
HINT:
The type of ignition switch on this model differs according to
the specifications of the vehicle. For the expressions used in
this section, refer to the "EXPRESSIONS OF IGNITION
SWITCH" precaution (See page ES-1).
1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM
(a) Connect the inte ...
Installation
1. INSTALL FUEL INJECTOR ASSEMBLY
(a) Apply a light coat of spindle oil or gasoline to new Orings,
and install them to each injector.
(b) Apply a light coat of spindle oil or gasoline where
the fuel delivery pipe contacts the O-ring.
(c) Push the fuel injector while turning it to inst ...
