Mute Signal Circuit between Television Display Assembly and Multi-media Interface ECU

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Mute Signal Circuit between Television Display Assembly and Multi-media Interface ECU
- Mute Signal Circuit between Television Display Assembly and Multi-media Interface ECU

DESCRIPTION

The television display assembly sends a mute signal to the radio receiver.

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 functioning, no sound, or only an extremely faint sound, can be heard.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - TELEVISION DISPLAY ASSEMBLY)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - TELEVISION DISPLAY ASSEMBLY)

(a) Disconnect the radio receiver and television display assembly connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT TELEVISION DISPLAY ASSEMBLY

(a) Reconnect the television display assembly connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

OK -- REPLACE RADIO RECEIVER Removal