Mute Signal Circuit between Radio Receiver and Multi-display Controller

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (W/ Multi-display): Mute Signal Circuit between Radio Receiver and Multi-display Controller

Mute Signal Circuit between Radio Receiver and Multi-display Controller

DESCRIPTION

The multi-display controller 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.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MULTI-DISPLAY CONTROLLER




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






NG -- CHECK SATELLITE RADIO TUNER
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK SATELLITE RADIO TUNER
(a) Check if the satellite radio tuner is equipped on the vehicle.

Result





B -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY CONTROLLER)
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SATELLITE RADIO TUNER)




(a) Disconnect the L53 receiver connector.
(b) Disconnect the R27 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 (SATELLITE RADIO TUNER - MULTI-DISPLAY CONTROLLER)




(a) Disconnect the R29 tuner connector.
(b) Disconnect the R32 controller 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 SATELLITE RADIO TUNER (OPERATION)
(a) Replace the satellite radio tuner with a normal one and check if the same problem occurs again Removal.
OK:
Same problem does not occur.
NG -- CHECK MULTI-DISPLAY CONTROLLER
OK -- END (SATELLITE RADIO TUNER IS DEFECTIVE)
6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY CONTROLLER)




(a) Disconnect the L53 receiver connector.
(b) Disconnect the R32 controller 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 CONTROLLER




(a) Reconnect the R32 controller connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






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