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AUDIO AND VISUAL SYSTEM(for 8 Speakers) Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier

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DTC Code DTC Name
  Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier
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DESCRIPTION

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

The sound signal that has been sent is amplified by the stereo component amplifier 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 stereo component amplifier assembly or speakers.

Table 1. *a (Shielded) *b Radio Receiver Assembly *c Stereo Component Amplifier Assembly
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WIRING DIAGRAM

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PROCEDURE


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


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the H87 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
      H179-1 (FR+) - H87-5 (R+) Always Below 1 Ω
      H179-5 (FR-) - H87-4 (R-) Always Below 1 Ω
      H179-2 (FL+) - H87-3 (L+) Always Below 1 Ω
      H179-6 (FL-) - H87-2 (L-) Always Below 1 Ω
      H87-6 (SLD) - Body ground Always 10 kΩ or higher
      H179-1 (FR+) - Body ground Always 10 kΩ or higher
      H179-5 (FR-) - Body ground Always 10 kΩ or higher
      H179-2 (FL+) - Body ground Always 10 kΩ or higher
      H179-6 (FL-) - 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