Sound Signal Circuit between Radio Receiver and Multi-display Controller

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Sound Signal Circuit between Radio Receiver and Multi-display Controller

DESCRIPTION

This is the sound signal circuit from the radio receiver to the multi-display selector.
HINT:
"Multi-display Controller" refers to the multi-display selector.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER





(a) Disconnect the L23 selector connector.
(b) Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the chart below.
OK:






NG -- CHECK VEHICLE EQUIPMENT
OK -- REPLACE MULTI-DISPLAY SELECTOR
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 AND MULTI-DISPLAY SELECTOR)





(a) Disconnect the F24 receiver connector.
(b) Disconnect the L37 and L39 tuner connectors.
(c) Disconnect the L23 selector connector.
(d) 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 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 -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- END (STEREO COMPONENT TUNER IS DEFECTIVE)
5. 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 -- REPLACE RADIO RECEIVER ASSEMBLY