DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER)
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)
AUDIO AND VISUAL SYSTEM (w/o Navigation System) - 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, no sound, or only an extremely faint sound, can be heard.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| F18-1 (MUTE) - Body ground | Engine switch on (ACC), audio system is playing → Changing sources | Above 2.5 V → Below 0.5 V |
Text in Illustration| *1 | Component with harness connected
(Stereo Component Amplifier Assembly) |
| OK | |
| |
| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
|
|
| 2.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER) |
Disconnect the F1 radio receiver assembly and F18 stereo component amplifier assembly connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F1-7 (MUTE) - F18-1 (MUTE) | Always | Below 1 Ω |
| F1-7 (MUTE) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL) |
Reconnect the F18 stereo component amplifier assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| F1-7 (MUTE) - Body ground | Engine switch on (ACC), audio system is playing | Above 2.5 V |
Text in Illustration| *1 | Front view of wire harness connector
(to Radio Receiver Assembly) |
| | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY ()
|
|
|
| OK | |
| |
| REPLACE RADIO RECEIVER ASSEMBLY ()
|
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