AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter

DESCRIPTION

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

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 stereo component amplifier assembly*, radio and display receiver assembly or speakers.


WIRING DIAGRAM

A00554BE23
*a Shielded
*b No. 1 Stereo Jack Adapter Assembly
*c Radio and Display Receiver Assembly

PROCEDURE


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


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

    2. Disconnect the D121 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
      D124-26 (VAR+) - D121-5 (ARO) Always Below 1 Ω
      D124-28 (VAL+) - D121-6 (ALO) Always Below 1 Ω
      D124-27 (VA-) - D121-7 (ASGN) Always Below 1 Ω
      D124-25 (ADPG) - D121-8 (AUXO) Always Below 1 Ω
      D124-11 (AGND) - D121-9 (AGND) Always Below 1 Ω
      D124-26 (VAR+) - Body ground Always 10 kΩ or higher
      D124-28 (VAL+) - Body ground Always 10 kΩ or higher
      D124-27 (VA-) - Body ground Always 10 kΩ or higher
      D124-25 (ADPG) - Body ground Always 10 kΩ or higher
      D124-11 (AGND) - 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