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

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DESCRIPTION

The multi-media interface ECU assembly sends the sound signal to the navigation computer sub-assembly*1 or display and navigation module display*2 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, navigation computer sub-assembly*1, display and navigation module display*2 or speakers.
  1. *1: w/ Navigation System (for HDD)
  2. *2: w/ Navigation System (for DVD)

WIRING DIAGRAM


E221390E02


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR

  1. Disconnect the navigation computer sub-assembly*1 connector or display and navigation module display*2 connector and multi-media interface ECU assembly connector.

    1. *1: w/ Navigation System (for HDD)
    2. *2: w/ Navigation System (for DVD)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H64-1 (AGND) - H69-1 (USD1)
    		Always
    		Below 1 Ω
    H64-3 (VAR+) - H69-2 (URO+)
    		Always
    		Below 1 Ω
    H64-4 (VAL+) - H69-3 (ULO+)
    		Always
    		Below 1 Ω
    H64-7 (VA-) - H69-4 (UGD1)
    		Always
    		Below 1 Ω
    H64-1 (AGND) - Body ground
    		Always
    		10 kΩ or higher
    H64-3 (VAR+) - Body ground
    		Always
    		10 kΩ or higher
    H64-4 (VAL+) - Body ground
    		Always
    		10 kΩ or higher
    H64-7 (VA-) - 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)