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Display Signal Circuit between Multi-display and Radio Receiver: Procedure

  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY) 
    1. Disconnect the multi-display connector and radio receiver connector.
      Fig 1: Identifying Terminals Of Multi-Display Connector
      GTY123578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying Terminals Of Radio Receiver Connector
      GTY128549Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      J62-2 (GND) - J52-4 (SGD1) Always Below 1 Ω
      J62-1 (NTSC) - J52-1 (NTSC) Always Below 1 Ω
      J62-3 (SLD) - J52-5 (SGND) Always Below 1 Ω
      J62-1 (NTSC) - Body ground Always 10 kΩ or higher
      J62-2 (GND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT RADIO RECEIVER (OUTPUT SIGNAL) 
    1. Reconnect the radio receiver connector.
      Fig 3: Identifying Terminals Of Radio Receiver Connector
      GTY154138Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the waveform according to the table below.
      Fig 4: Identifying Signal Waveform
      GTY128458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      Tester Connection Condition Specified Condition
      J52-1 (NTSC) - Body ground DVD display is ON A waveform synchronized with display signals is output

      HINT: 

      The waveform pattern may differ from that shown in the illustration due to differences in oscilloscope settings. A normal radio receiver operating condition can be determined if any waveform is output.

      Oscilloscope wave

      Terminal: J52-1 (NTSC) - Body ground

      Setting: 200 mV/DIV. 10 μs/DIV.

      Condition: DVD display is on.

    NG → See step   4 

    OK → See step   3 

  3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  4. REPLACE RADIO RECEIVER. Refer to  REMOVAL