AUDIO AND VISUAL SYSTEM (w/o Navigation System) > Sound Signal Circuit between Radio Receiver and Multi-media Interface ECU

for Preparation Click here


DESCRIPTION

The multi-media interface ECU assembly sends the sound signal to the radio receiver assembly through this circuit.
If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, radio receiver assembly or speakers.

WIRING DIAGRAM


E190631E07


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU ASSEMBLY)

  1. Disconnect the radio receiver assembly and multi-media interface ECU assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H69-1 (USD1) - H53-1 (CSLD)
    		Always
    		Below 1 Ω
    H69-2 (URO+) - H53-2 (CDR+)
    		Always
    		Below 1 Ω
    H69-3 (URO-) - H53-3 (CDR-)
    		Always
    		Below 1 Ω
    H69-4 (ULO+) - H53-4 (CDL+)
    		Always
    		Below 1 Ω
    H69-5 (ULO-) - H53-5 (CDL-)
    		Always
    		Below 1 Ω
    H69-1 (USD1) - Body ground
    		Always
    		10 kΩ or higher
    H69-2 (URO+) - Body ground
    		Always
    		10 kΩ or higher
    H69-3 (URO-) - Body ground
    		Always
    		10 kΩ or higher
    H69-4 (ULO+) - Body ground
    		Always
    		10 kΩ or higher
    H69-5 (ULO-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)