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

DTC Code DTC Name
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 ECU sub-assembly via this circuit.

The sound signal that has been sent is amplified by the navigation ECU sub-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 ECU sub-assembly or speakers.

WIRING DIAGRAM

E229861E37

PROCEDURE

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

    1. Disconnect the G139 navigation ECU sub-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

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR