AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit

DESCRIPTION

The sound signals amplified by the radio and display receiver assembly are sent to the speakers from the radio and display receiver assembly via the speaker circuit.

If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is not a malfunction in the radio and display receiver assembly or speakers.

WIRING DIAGRAM

B001YVIE08

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for RH Side

    • *2: for LH Side


    1. Disconnect the F122 and F120 radio and display receiver assembly connectors.

    2. Disconnect the F13*1 and/or F14*2 front No. 1 speaker assembly connector.

    3. Disconnect the F7*1 and/or F8*2 front No. 2 speaker assembly connector.

    4. Disconnect the J18*1 and/or J19*2 rear speaker set connector.

      Standard Resistance
      RH Side
      Tester Connection Condition Specified Condition
      F120-1 (FR+) - F7-1 (+) Always Below 1 Ω
      F120-5 (FR-) - F7-3 (-) Always Below 1 Ω
      F7-2 (TWR+) - F13-1 Always Below 1 Ω
      F7-4 (TWR-) - F13-2 Always Below 1 Ω
      F122-1 (RR+) - J18-1 Always Below 1 Ω
      F122-3 (RR-) - J18-2 Always Below 1 Ω
      F120-1 (FR+) - Body ground Always 10 kΩ or higher
      F120-5 (FR-) - Body ground Always 10 kΩ or higher
      F7-2 (TWR+) - Body ground Always 10 kΩ or higher
      F7-4 (TWR-) - Body ground Always 10 kΩ or higher
      F122-1 (RR+) - Body ground Always 10 kΩ or higher
      F122-3 (RR-) - Body ground Always 10 kΩ or higher
      LH Side
      Tester Connection Condition Specified Condition
      F120-2 (FL+) - F8-1 (+) Always Below 1 Ω
      F120-6 (FL-) - F8-3 (-) Always Below 1 Ω
      F8-2 (TWL+) - F14-1 Always Below 1 Ω
      F8-4 (TWL-) - F14-2 Always Below 1 Ω
      F122-2 (RL+) - J19-1 Always Below 1 Ω
      F122-6 (RL-) - J19-2 Always Below 1 Ω
      F120-2 (FL+) - Body ground Always 10 kΩ or higher
      F120-6 (FL-) - Body ground Always 10 kΩ or higher
      F8-2 (TWL+) - Body ground Always 10 kΩ or higher
      F8-4 (TWL-) - Body ground Always 10 kΩ or higher
      F122-2 (RL+) - Body ground Always 10 kΩ or higher
      F122-6 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly Click here.

    2. Inspect the front No. 1 speaker assembly Click here.


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker with a known good one Click here.

    2. Check that the malfunction disappears.

      Tech Tips


      • Connect all the connectors that were disconnected from the front No. 2 speaker assemblies.

      • When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

      OK
      Malfunction disappears.

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  4. INSPECT REAR SPEAKER SET


    1. Remove the rear speaker set Click here.

    2. Inspect the rear speaker set Click here.


    OK

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

    NG

    REPLACE REAR SPEAKER SET Click here