NAVIGATION SYSTEM(for Radio and Display Type) 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 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.

WIRING DIAGRAM

A005DP1E40
*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 L167 radio and display receiver assembly connector.

    2. Disconnect the L31 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
      L31-5 (R+) - L167-1 (FR+) Always Below 1 Ω
      L31-4 (R-) - L167-5 (FR-) Always Below 1 Ω
      L31-3 (L+) - L167-2 (FL+) Always Below 1 Ω
      L31-2 (L-) - L167-6 (FL-) Always Below 1 Ω
      L31-6 (SLD) - Body ground Always 10 kΩ or higher
      L31-5 (R+) - Body ground Always 10 kΩ or higher
      L31-4 (R-) - Body ground Always 10 kΩ or higher
      L31-3 (L+) - Body ground Always 10 kΩ or higher
      L31-2 (L-) - 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