NAVIGATION SYSTEM Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

The radio and display receiver assembly sends a sound signal to the stereo component amplifier assembly via this circuit.

The sound signal that is sent is amplified by the stereo component amplifier assembly, and then is sent to the speakers.

If there is an open or short in this circuit, sound cannot be heard from the speakers even if the stereo component amplifier assembly or speakers are not malfunctioning.

WIRING DIAGRAM

A001X1GE34
*a (Shielded)
*b Radio and Display Receiver Assembly
*c Stereo Component Amplifier Assembly

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the F126 radio and display receiver assembly connector.

    2. Disconnect the F76 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-5 (R+) - F126-1 (FR+) Always Below 1 Ω
      F76-4 (R-) - F126-5 (FR-) Always Below 1 Ω
      F76-3 (L+) - F126-2 (FL+) Always Below 1 Ω
      F76-2 (L-) - F126-6 (FL-) Always Below 1 Ω
      F76-6 (SLD) - Body ground Always 10 kΩ or higher
      F76-5 (R+) or F126-1 (FR+) - Body ground Always 10 kΩ or higher
      F76-4 (R-) or F126-5 (FR-) - Body ground Always 10 kΩ or higher
      F76-3 (L+) or F126-2 (FL+) - Body ground Always 10 kΩ or higher
      F76-2 (L-) or F126-6 (FL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG