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 no malfunction in the radio and display receiver assembly or speakers.

WIRING DIAGRAM


  1. for 6 Speakers:

    A01QS7AE48

  2. for 11 Speakers:

    A01QRS2E04
    A01QP1DE09
    *a Rear Speaker Assembly RH
    *b Rear Speaker Assembly LH
    *c Woofer Box Speaker Assembly
    *d Stereo Component Amplifier Assembly

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for 6 Speakers A
      for 11 Speakers B

    B

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G141 and G142 radio and display receiver assembly connectors.

    2. Disconnect the J1*1 and/or I1*2 front No. 1 speaker assembly connector.

    3. Disconnect the H1*1 and/or H3*2 front No. 2 speaker assembly connector.

    4. Disconnect the L2*1 and/or K2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G141-2 (FL+) - H1-4 (TWL+) Always Below 1 Ω
      G141-6 (FL-) - H1-2 (TWL-) Always Below 1 Ω
      H1-3 (+) - J1-1 Always Below 1 Ω
      H1-1 (-) - J1-2 Always Below 1 Ω
      G142-2 (RL+) - L2-1 Always Below 1 Ω
      G142-6 (RL-) - L2-2 Always Below 1 Ω
      G141-2 (FL+) - Body ground Always 10 kΩ or higher
      G141-6 (FL-) - Body ground Always 10 kΩ or higher
      G142-2 (RL+) - Body ground Always 10 kΩ or higher
      G142-6 (RL-) - Body ground Always 10 kΩ or higher
      H1-3 (+) - Body ground Always 10 kΩ or higher
      H1-1 (-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G141-1 (FR+) - H3-4 (TWR+) Always Below 1 Ω
      G141-5 (FR-) - H3-2 (TWR-) Always Below 1 Ω
      H3-3 (+) - I1-1 Always Below 1 Ω
      H3-1 (-) - I1-2 Always Below 1 Ω
      G142-1 (RR+) - K2-1 Always Below 1 Ω
      G142-3 (RR-) - K2-2 Always Below 1 Ω
      G141-1 (FR+) - Body ground Always 10 kΩ or higher
      G141-5 (FR-) - Body ground Always 10 kΩ or higher
      G142-1 (RR+) - Body ground Always 10 kΩ or higher
      G142-3 (RR-) - Body ground Always 10 kΩ or higher
      H3-3 (+) - Body ground Always 10 kΩ or higher
      H3-1 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. 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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  4. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly.

      Click here

    2. Check the malfunction disappears.

      OK
      Malfunction disappears.

      Tech Tips


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

      • 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.

      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  5. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      Click here

    2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the M33 stereo component amplifier assembly connector.

    2. Disconnect the J1*1 and/or I1*2 front No. 1 speaker assembly connector.

    3. Disconnect the H2*1 and/or H4*2 front No. 2 speaker assembly connector.

    4. Disconnect the L2*1 and/or K2*2 rear speaker assembly connector.

    5. Disconnect the M34 Woofer box speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      M33-14 (FL+) - J1-1 Always Below 1 Ω
      M33-29 (FL-) - J1-2 Always Below 1 Ω
      M33-10 (TWL+) - H2-4 (TWL+) Always Below 1 Ω
      M33-25 (TWL-) - H2-3 (TWL-) Always Below 1 Ω
      M33-11 (RL+) - L2-1 Always Below 1 Ω
      M33-26 (RL-) - L2-2 Always Below 1 Ω
      M33-14 (FL+) - Body ground Always 10 kΩ or higher
      M33-29 (FL-) - Body ground Always 10 kΩ or higher
      M33-10 (TWL+) - Body ground Always 10 kΩ or higher
      M33-25 (TWL-) - Body ground Always 10 kΩ or higher
      M33-11 (RL+) - Body ground Always 10 kΩ or higher
      M33-26 (RL-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      M33-9 (FR+) - I1-1 Always Below 1 Ω
      M33-24 (FR-) - I1-2 Always Below 1 Ω
      M33-13 (TWR+) - H4-4 (TWR+) Always Below 1 Ω
      M33-28 (TWR-) - H4-3 (TWR-) Always Below 1 Ω
      M33-12 (RR+) - K2-1 Always Below 1 Ω
      M33-27 (RR-) - K2-2 Always Below 1 Ω
      M33-9 (FR+) - Body ground Always 10 kΩ or higher
      M33-24 (FR-) - Body ground Always 10 kΩ or higher
      M33-13 (TWR+) - Body ground Always 10 kΩ or higher
      M33-28 (TWR-) - Body ground Always 10 kΩ or higher
      M33-12 (RR+) - Body ground Always 10 kΩ or higher
      M33-27 (RR-) - Body ground Always 10 kΩ or higher
      for Woofer Box Speaker
      Tester Connection Condition Specified Condition
      M33-15 (WFR+) - M34-4 (WF+) Always Below 1 Ω
      M33-30 (WFR-) - M34-1 (WF-) Always Below 1 Ω
      M33-8 (WFL+) - M34-3 (WF+) Always Below 1 Ω
      M33-23 (WFL-) - M34-2 (WF-) Always Below 1 Ω
      M33-15 (WFR+) - Body ground Always 10 kΩ or higher
      M33-30 (WFR-) - Body ground Always 10 kΩ or higher
      M33-8 (WFL+) - Body ground Always 10 kΩ or higher
      M33-23 (WFL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. 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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  8. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly.

      Click here

    2. Check the malfunction disappears.

      Tech Tips


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

      • 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.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  9. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      Click here

    2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  10. INSPECT WOOFER BOX SPEAKER ASSEMBLY


    1. Remove the woofer box speaker assembly.

      Click here

    2. Inspect the woofer box speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE WOOFER BOX SPEAKER ASSEMBLY Click here