Toyota Camry (XV70): Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier
DESCRIPTION
This circuit sends a signal to the stereo component amplifier assembly 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 assembly is functioning normally, no sound or only an extremely faint sound can be heard.
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
- Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
Click here
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- When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
PROCEDURE
|
1. | INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
| (a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
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| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
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| 2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) |
(a) Disconnect the K3 radio and display receiver assembly connector.
(b) Disconnect the K10 stereo component amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K3-25 (MUT1) - K10-1 (MUTE) |
Always | Below 1 Ω |
|
K3-25 (MUT1) or K10-1 (MUTE) - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL) |
(a) Reconnect the K10 stereo component amplifier assembly connector.
| (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
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| OK | | REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
| NG | | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
|
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HINT:
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SEE MORE:
No Sound can be Heard from Speakers
PROCEDURE
1. CHECK AUDIO SETTINGS
(a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal.
OK: Audio system returns to normal. HINT: Sound quality adjustment measures vary according to the type of amplifier.
OK
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the susp
