AUDIO AND VISUAL SYSTEM(for Radio Receiver Type) Speaker Circuit

DESCRIPTION

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

As a result, sound cannot be heard from the speakers even if there is no malfunction in the radio receiver assembly or speakers.

WIRING DIAGRAM

A01WABCE01

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for 2 Speakers

    • *2: for 4 Speakers

    • *3: for 6 Speakers

    • *4: for LH Side

    • *5: for RH Side


    1. Disconnect the G118 and/or G119*2, *3 radio receiver assembly connectors.

    2. Disconnect the K4*4 and/or J4*5 front No. 1 speaker assembly connector.

    3. Disconnect the K7*4 and/or J7*5 front No. 2 speaker assembly connector*3.

    4. Disconnect the M2*4 and/or L2*5 rear speaker assembly connector*2, *3.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G118-2 (FL+) - K4-1*1, *2 Always Below 1 Ω
      G118-6 (FL-) - K4-2*1, *2 Always Below 1 Ω
      G119-2 (RL+) - M2-1*2, *3 Always Below 1 Ω
      G119-6 (RL-) - M2-2*2, *3 Always Below 1 Ω
      G118-2 (FL+) - K7-4 (TWL+)*3 Always Below 1 Ω
      G118-6 (FL-) - K7-2 (TWL-)*3 Always Below 1 Ω
      K7-3 (+) - K4-1*3 Always Below 1 Ω
      K7-1 (-) - K4-2*3 Always Below 1 Ω
      G118-2 (FL+) or K4-1 - Body ground*1, *2 Always 10 kΩ or higher
      G118-6 (FL-) or K4-2 - Body ground*1, *2 Always 10 kΩ or higher
      G119-2 (RL+) or M2-1 - Body ground*2, *3 Always 10 kΩ or higher
      G119-6 (RL-) or M2-2 - Body ground*2, *3 Always 10 kΩ or higher
      G118-2 (FL+) or K7-4 (TWL+) - Body ground*3 Always 10 kΩ or higher
      G118-6 (FL-) or K7-2 (TWL-) - Body ground*3 Always 10 kΩ or higher
      K7-3 (+) or K4-1 - Body ground*3 Always 10 kΩ or higher
      K7-1 (-) or K4-2 - Body ground*3 Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G118-1 (FR+) - J4-1*1, *2 Always Below 1 Ω
      G118-5 (FR-) - J4-2*1, *2 Always Below 1 Ω
      G119-1 (RR+) - L2-1*2, *3 Always Below 1 Ω
      G119-3 (RR-) - L2-2*2, *3 Always Below 1 Ω
      G118-1 (FR+) - J7-4 (TWR+)*3 Always Below 1 Ω
      G118-5 (FR-) - J7-2 (TWR-)*3 Always Below 1 Ω
      J7-3 (+) - J4-1*3 Always Below 1 Ω
      J7-1 (-) - J4-2*3 Always Below 1 Ω
      G118-1 (FR+) or J4-1 - Body ground*1, *2 Always 10 kΩ or higher
      G118-5 (FR-) or J4-2 - Body ground*1, *2 Always 10 kΩ or higher
      G119-1 (RR+) or L2-1 - Body ground*2, *3 Always 10 kΩ or higher
      G119-3 (RR-) or L2-2 - Body ground*2, *3 Always 10 kΩ or higher
      G118-1 (FR+) or J7-4 (TWR+) - Body ground*3 Always 10 kΩ or higher
      G118-5 (FR-) or J7-2 (TWR-) - Body ground*3 Always 10 kΩ or higher
      J7-3 (+) or J4-1 - Body ground*3 Always 10 kΩ or higher
      J7-1 (-) or J4-2 - Body ground*3 Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    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

      Result
      Result Proceed to
      OK (for 2 Speakers) A
      OK (for 4 or 6 Speakers) B
      NG C

    A

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

    C

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    B

  3. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      for Double Cab: Click here

      for Smart Cab: Click here

    2. Inspect the rear speaker assembly.

      for Double Cab: Click here

      for Smart Cab: Click here

      Result
      Result Proceed to
      OK (for 4 Speakers) A
      OK (for 6 Speakers) B
      NG (for Double Cab) C
      NG (for Smart Cab) D

    A

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

    C

    REPLACE REAR SPEAKER ASSEMBLY Click here

    D

    REPLACE REAR SPEAKER ASSEMBLY Click here

    B

  4. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Temporarily replace the front No. 2 speaker assembly with a new or normally functioning one.

      Click here

    2. Check that sound is emitted from the speaker normally.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

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