Toyota Sienna Service Manual: Mute Signal Circuit between Radio Receiver and Television Display Assembly
DESCRIPTION
The radio receiver controls the volume according to the MUTE signal from the television display assembly.
The MUTE signal is sent to reduce noise and a popping sound generated when switching the mode, etc.
If there is an open in the circuit, noise can be heard from the speakers when changing the sound source.
If there is a short in the circuit, even though the radio receiver is normal, no sound or, only an extremely small sound, can be produced.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TELEVISION DISPLAY ASSEMBLY
- Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - TELEVISION DISPLAY)
- Disconnect the radio receiver connector R8 and television display assembly connector T14.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 REPLACE TELEVISION DISPLAY ASSEMBLY
- Replace the television display assembly and check if the audio system operates normally.
OK: The audio system operates normally
REPLACE RADIO RECEIVER
Mute Signal Circuit between Radio Receiver and Stereo Component
Amplifier
DESCRIPTION
This circuit sends a signal to the stereo component amplifier to mute noise.
Because of that, the noise
produced by changing the sound source ceases.
If there is an open in the circ ...
AVC-LAN Circuit
DESCRIPTION
Each unit of the audio system connected to the AVC-LAN (communication bus)
transfers the signal of
each switch by communication.
When a short to +B or short to ground occurs in this ...
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Air conditioning unit
COMPONENTS
...
Coolant
Replacement
1. REMOVE NO. 1 ENGINE UNDER COVER (See page
EM-26)
2. REMOVE V-BANK COVER SUB-ASSEMBLY (See
page EM-28)
3. DRAIN ENGINE COOLANT
(a) Loosen the radiator drain cock plug.
HINT:
Collect the coolant in a container and dispose of it
according to the regulations in your area.
(b ...
Reassembly
1. INSTALL MAGNETIC CLUTCH ASSEMBLY
(a) Install the magnetic clutch stator while aligning the
protrusion on the stator with the notch on the air
compressor assembly as shown in the illustration.
(b) Using a snap ring expander, install a new snap ring
with the chamfered side facing up.
...
