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 ...
Other materials:
Reassembly
1. INSTALL STRAIGHT PIN
(a) Using a plastic hammer, tap in new straight pins to
the cylinder block.
Standard protrusion
2. INSTALL STUD BOLT
(a) Using E8 and E10 "TORX" sockets, install the stud
bolts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) for bolt A
17 N*m (173 kgf*cm, ...
Problem symptoms table
SLIDE DOOR CLOSER SYSTEM
Symptom
Suspected Area
Slide door closer LH does not operate (*1)
ECU-B fuse
Power slide door lock assembly LH
Power slide door ECU LH
Wire harness
Slide door closer RH does not operate
ECU-B ...
Turn signal light switch
ON-VEHICLE INSPECTION
1. INSPECT TURN SIGNAL FLASHER CIRCUIT
Measure voltage between the terminals as shown in
the chart below.
Voltage
Connect the connector to turn the signal flasher and
turn the ignition switch ON, and inspect the wire
harness side connector from t ...