Mute Signal Circuit between Radio Receiver and Multi-display Controller

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Mute Signal Circuit between Radio Receiver and Multi-display Controller

DESCRIPTION

The multi-display selector controls the volume according to the mute signal from the radio receiver.
The mute signal is sent to reduce noise and a popping sound generated when switching the mode, etc.
HINT:
"Multi-display Controller" refers to the multi-display selector.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MULTI-DISPLAY SELECTOR





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






NG -- CHECK VEHICLE EQUIPMENT
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK VEHICLE EQUIPMENT
(a) Check if the SDARS system is equipped on the vehicle.

Result





B -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR)
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER)





(a) Disconnect the F24 receiver connector.
(b) Disconnect the L37 tuner connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-DISPLAY SELECTOR)





(a) Disconnect the L39 tuner connector.
(b) Disconnect the L23 selector connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK STEREO COMPONENT TUNER (OPERATION)
(a) Replace the stereo component tuner with a normal one and check if the same problem occurs again Removal.
OK:
Same problem does not occur.
NG -- CHECK MULTI-DISPLAY SELECTOR
OK -- END (STEREO COMPONENT TUNER IS DEFECTIVE)
6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR)





(a) Disconnect the F24 receiver connector.
(b) Disconnect the L23 selector connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK MULTI-DISPLAY SELECTOR





(a) Reconnect the L23 selector connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPLACE MULTI-DISPLAY SELECTOR
OK -- REPLACE RADIO RECEIVER ASSEMBLY