AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit (Built-in Amplifier)

DESCRIPTION

The radio and display receiver assembly sends sound signals to the speakers.

WIRING DIAGRAM

A004NBGE22

PROCEDURE


  1. CHECK SPEAKER


    1. Check the malfunctioning speakers.

      Result
      Result Proceed to
      Malfunction in front speaker area A
      Malfunction in rear speaker area B

    B

    INSPECT REAR NO. 1 SPEAKER ASSEMBLY Click here

    A

  2. CHECK FRONT SIDE SPEAKER


    1. Check the malfunctioning speakers.

      Result
      Result Proceed to
      Front No. 2 speaker assembly A
      Front No. 1 speaker assembly B

    B

    INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Click here

    A

  3. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Temporarily replace the front No. 2 speaker assembly with a known good one Click here.

    2. Check that 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.

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  4. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)


    1. Disconnect the D125 radio and display receiver assembly connector.

    2. Disconnect the D39*1 and/or D40*2 front No. 2 speaker assembly connector.

      *1: for RH Side

      *2: for LH Side

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      D125-1 (FR+) - D39-4 (+) Always Below 1 Ω
      D125-5 (FR-) - D39-2 (-) Always Below 1 Ω
      D125-1 (FR+) - Body ground Always 10 kΩ or higher
      D125-5 (FR-) - Body ground Always 10 kΩ or higher
      for LH Side
      Tester Connection Condition Specified Condition
      D125-2 (FL+) - D40-4 (+) Always Below 1 Ω
      D125-6 (FL-) - D40-2 (-) Always Below 1 Ω
      D125-2 (FL+) - Body ground Always 10 kΩ or higher
      D125-6 (FL-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. 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

  6. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)

    *1: for RH Side

    *2: for LH Side


    1. Disconnect the D39*1 and/or D40*2 front No. 2 speaker assembly connector.

    2. Disconnect the E1*1 and/or E11*2 front No. 1 speaker assembly connector.

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      D39-3 (TWR+) - E1-1 Always Below 1 Ω
      D39-1 (TWR-) - E1-2 Always Below 1 Ω
      D39-3 (TWR+) - Body ground Always 10 kΩ or higher
      D39-1 (TWR-) - Body ground Always 10 kΩ or higher
      for LH Side
      Tester Connection Condition Specified Condition
      D40-3 (TWL+) - E11-1 Always Below 1 Ω
      D40-1 (TWL-) - E11-2 Always Below 1 Ω
      D40-3 (TWL+) - Body ground Always 10 kΩ or higher
      D40-1 (TWL-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT REAR NO. 1 SPEAKER ASSEMBLY


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

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


    NG

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR NO. 1 SPEAKER ASSEMBLY)


    1. Disconnect the D126 radio and display receiver assembly connector.

    2. Disconnect the F2*1 and/or F7*2 rear No. 1 speaker assembly connector.

      *1: for RH Side

      *2: for LH Side

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      D126-1 (RR+) - F2-1 Always Below 1 Ω
      D126-3 (RR-) - F2-2 Always Below 1 Ω
      D126-1 (RR+) - Body ground Always 10 kΩ or higher
      D126-3 (RR-) - Body ground Always 10 kΩ or higher
      for LH Side
      Tester Connection Condition Specified Condition
      D126-2 (RL+) - F7-1 Always Below 1 Ω
      D126-6 (RL-) - F7-2 Always Below 1 Ω
      D126-2 (RL+) - Body ground Always 10 kΩ or higher
      D126-6 (RL-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR