NAVIGATION SYSTEM (for HDD) DVD Image Signal Circuit between Radio Receiver and Navigation ECU

DESCRIPTION

This circuit sends a DVD image signal from the radio receiver assembly to the display and navigation module display.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

   
   

   1. 

      Disconnect the G12 radio receiver assembly connector.

   2. 

      Disconnect the G5 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G12-8 (NTSC) - G5-9 (VV+) Always Below 1 Ω G12-22 (GND) - G5-20 (VV-) Always Below 1 Ω G12-8 (NTSC) - Body ground Always 10 kΩ or higher G12-22 (GND) - Body ground Always 10 kΩ or higher G12-7 (SLD) - Body ground Always 10 kΩ or higher

      Text in Illustration

      *1	Front view of wire harness connector (to Radio Receiver Assembly)
      *2	Front view of wire harness connector (to Display and Navigation Module Display)

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT RADIO RECEIVER ASSEMBLY (DVD IMAGE SIGNAL)

   
   

   1. 

      Reconnect the G12 radio receiver assembly connector.

   2. Check the waveform according to the table below.

   3. 

      Text in Illustration

      *1	Component with harness connected (Radio Receiver Assembly)
      *2	Synchronization Signal
      *3	Video Waveform

      Oscilloscope waveform

      Item	Content
      Measurement terminal	G12-8 (NTSC) - Body ground
      Measurement setting	200 mV/DIV., 10 μs/DIV.
      Condition	DVD is displayed on multi-display

      Tech Tips

      The video waveform changes according to the image output from the radio receiver assembly to the display and navigation module display, but the synchronization signal does not change.

   
   

   NG

   REPLACE RADIO RECEIVER ASSEMBLY Click here

   OK

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