| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000014OW01QX |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
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 normal, no sound, or only an extremely small sound, can be produced.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
|
(a) Disconnect the I17 stereo component amplifier assembly connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I17-1 (MUTE) - Body ground |
Ignition switch ACC, Audio system is playing → Changing modes |
Above 3.5 V → Below 1 V |
(c) Reconnect the stereo component amplifier connector.
|
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER) |
|
(a) Disconnect the I4 radio receiver assembly connector. |
(b) Disconnect the I17 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 |
|---|---|---|
|
I4-7 (MUTE) - I17-1 (MUTE) |
Always |
Below 1 Ω |
|
I4-7 (MUTE) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the radio receiver assembly connector.
(e) Reconnect the stereo component amplifier assembly connector.
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