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DVD Image Signal Circuit between Navigation ECU and Multi-display: Procedure

  1. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the F31 display and navigation module display connector.
    2. Disconnect the F37 multi-media module wire connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F31-10 (NTSF) - F37-2 (NTS1) Always Below 1 Ω
      F31-21 (SGD1) - F37-7 (SGN1) Always Below 1 Ω
      F31-10 (NTSF) - Body ground Always 10 kΩ or higher
      F31-21 (SGD1) - Body ground Always 10 kΩ or higher
      F31-22 (SLD1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT MULTI-MEDIA MODULE WIRE 
    1. Disconnect the F37 multi-media module wire connector.
      Fig 1: Identifying F37 Multi-Media Module Wire Connector Terminals
      GTY259616Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the DC1 multi-media module wire connector.
      Fig 2: Identifying DC1 Multi-Media Module Wire Connector Terminals
      GTY266677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F37-2 (NTS1) - DC1-4 (NTS1) Always Below 1 Ω
      F37-7 (SGN1) - DC1-16 (SGN1) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (multi-media module wire)

    NG → See step   6 

    OK: Go to next step 

  3. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY (DVD IMAGE SIGNAL) 
    1. Reconnect the F31 display and navigation module display connector.
      Fig 3: F31 Display And Navigation Module Display Connector Terminals
      GTY262500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the waveform according to the table below.
    3. Oscilloscope waveform
      Fig 4: Identifying Oscilloscope Waveform
      GTY275926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Measurement terminal F31-10 (NTSF) - Body ground
      Measurement setting 200 mV/DIV., 10 μs/DIV.
      Condition DVD is played on multi-display

      HINT: 

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

      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Display and Navigation Module Display)
      *2 Synchronization Signal
      *3 Video Waveform

    NG → See step   5 

    OK → See step   4 

  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  5. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to  REMOVAL 
  6. REPLACE MULTI-MEDIA MODULE WIRE. Refer to  DISASSEMBLY 
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