NAVIGATION SYSTEM Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter

DESCRIPTION

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

The sound signal that has been sent is amplified by the radio and display 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 radio and display receiver assembly or speakers.

WIRING DIAGRAM

A004TW0E04

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


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


    1. Disconnect the D121 No. 1 stereo jack adapter assembly connector.

    2. Disconnect the D124 radio and display receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D121-7 (ALO) - D124-28 (VAL+) Always Below 1 Ω
      D121-6 (ARO) - D124-26 (VAR+) Always Below 1 Ω
      D121-8 (ASGN) - D124-27 (VA-) Always Below 1 Ω
      D121-10 (AGND) - D124-11 (AGND) Always Below 1 Ω
      D121-9 (AUXO) - D124-25 (ADPG) Always Below 1 Ω
      D121-7 (ALO) - Body ground Always 10 kΩ or higher
      D121-6 (ARO) - Body ground Always 10 kΩ or higher
      D121-8 (ASGN) - Body ground Always 10 kΩ or higher
      D121-10 (AGND) - Body ground Always 10 kΩ or higher
      D121-9 (AUXO) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR