NAVIGATION SYSTEM(for SD) Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter

DESCRIPTION

The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the navigation receiver assembly via this circuit.

The sound signal that has been sent is amplified by the navigation receiver assembly, and then is sent to the speakers.

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 navigation receiver assembly or speakers.

WIRING DIAGRAM

A01V844E05
*a Shielded
*b No. 1 Stereo Jack Adapter Assembly
*c Navigation Receiver Assembly

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)


    1. Disconnect the G139 navigation receiver assembly connector.

    2. Disconnect the G145 No. 1 stereo jack adapter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G139-25 (ADPG) - G145-8 (AUXO) Always Below 1 Ω
      G139-26 (VAR+) - G145-5 (ARO) Always Below 1 Ω
      G139-28 (VAL+) - G145-6 (ALO) Always Below 1 Ω
      G139-27 (VA-) - G145-7 (ASGN) Always Below 1 Ω
      G139-11 (AGND) - G145-9 (AGND) Always Below 1 Ω
      G139-25 (ADPG) - Body ground Always 10 kΩ or higher
      G139-26 (VAR+) - Body ground Always 10 kΩ or higher
      G139-28 (VAL+) - Body ground Always 10 kΩ or higher
      G139-27 (VA-) - Body ground Always 10 kΩ or higher
      G139-11 (AGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR