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

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, telematics transceiver*3 or speakers.

• *1: w/ Navigation System (for HDD)

• *2: w/ Navigation System (for DVD)

• *3: w/ G-BOOK System

WIRING DIAGRAM

INSPECTION PROCEDURE

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: w/ Navigation System (for HDD)

      • *2: w/ Navigation System (for DVD)

   2. 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