Toyota Sienna Service Manual: 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 circuit, noise can be heard from the speakers when changing the sound source.
If there is a short in the circuit, even though the stereo component amplifier is normal, no sound, or only an extremely small sound, can be produced.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT STEREO COMPONENT AMPLIFIER
- Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)
- Disconnect the radio receiver connector R7 and stereo component amplifier connector S11.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 REPLACE STEREO COMPONENT AMPLIFIER
- Replace the stereo component amplifier and check if the audio system operates normally.
OK: The audio system operates normally.
REPLACE RADIO RECEIVER
Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION
The stereo jack adapter sends an external device sound signal to the radio
receiver through this circuit.
The sound signal that has been sent is amplified by the stereo component
a ...
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 ...
Other materials:
Engine immobiliser system
PARTS LOCATION
SYSTEM DESCRIPTION
The engine immobiliser system has been designed to prevent
the vehicle from being stolen. This system uses a
transponder key ECU that stores the key code of the
authorized ignition key. If an attempt is made to start the
engine using a non-authorized key, ...
Diagnostic trouble code chart
If a DTC is displayed during the DTC check, check the parts
listed in the table below and proceed to the page given.
HINT:
*1: Comes on MIL (Malfunction Indicator Lamp) light up
*2: "DTC stored" mark means ECM memorizes the
malfunction code if the ECM detects the DTC detection
...
Transmission Error
DTC 01-DC Transmission Error
DESCRIPTION
HINT:
*1: This code may be stored if the engine is started, idled for 60 seconds and
then started again.
NOTICE:
Before starting troubleshooting, be sure to clear DTCs to erase
codes stored due to the
reasons described in the HINT ...
