AUDIO AND VISUAL SYSTEM (w/o Microphone) Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the radio 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 receiver assembly or speakers.

If a short is detected in a speaker circuit, no sound can be heard from the speakers.

WIRING DIAGRAM

A0138OEE01

INSPECTION PROCEDURE

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for 2 Speakers A
      for 4 Speakers B

    B

    CHECK HARNESS AND CONNECTOR Click here

    A

  2. CHECK HARNESS AND CONNECTOR


    1. Disconnect the C18 radio receiver assembly connector.

    2. Disconnect the C3 and C10 front No. 1 speaker assembly connectors.

    3. Measure the resistance between each of the radio receiver assembly and the front No. 1 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C18-5 (FL+) - C3-1 Always Below 1 Ω
      C18-6 (FL-) - C3-2 Always Below 1 Ω
      C18-3 (FR+) - C10-1 Always Below 1 Ω
      C18-4 (FR-) - C10-2 Always Below 1 Ω

    4. Measure the resistance between each speaker assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C3-1 - Body ground Always 10 kΩ or higher
      C3-2 - Body ground Always 10 kΩ or higher
      C10-1 - Body ground Always 10 kΩ or higher
      C10-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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

      Tech Tips

      The speaker should not be removed to check resistance.


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

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

  4. CHECK HARNESS AND CONNECTOR


    1. Disconnect the C18 radio receiver assembly connector.

    2. Disconnect the C47 and C46 front No. 1 speaker assembly connectors.

    3. Disconnect the E6 and D6 rear No. 3 speaker assembly connectors.

    4. Measure the resistance between each of the radio receiver assembly and the front No. 1 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C18-5 (FL+) - C47-2 (TWL+) Always Below 1 Ω
      C18-6 (FL-) - C47-4 (TWL-) Always Below 1 Ω
      C18-3 (FR+) - C46-2 (TWR+) Always Below 1 Ω
      C18-4 (FR-) - C46-4 (TWR-) Always Below 1 Ω

    5. Measure the resistance between each of the front No. 1 speaker assembly and rear No. 3 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C47-1 (+) - E6-1 Always Below 1 Ω
      C47-3 (-) - E6-2 Always Below 1 Ω
      C46-1 (+) - D6-1 Always Below 1 Ω
      C46-3 (-) - D6-2 Always Below 1 Ω

    6. Measure the resistance between each speaker assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C47-2 (TWL+) - Body ground Always 10 kΩ or higher
      C47-4 (TWL-) - Body ground Always 10 kΩ or higher
      C46-2 (TWR+) - Body ground Always 10 kΩ or higher
      C46-4 (TWR-) - Body ground Always 10 kΩ or higher
      E6-1 - Body ground Always 10 kΩ or higher
      E6-2 - Body ground Always 10 kΩ or higher
      D6-1 - Body ground Always 10 kΩ or higher
      D6-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  6. INSPECT REAR NO. 3 SPEAKER ASSEMBLY


    1. Inspect the rear No. 3 speaker assembly Click here.


    NG

    REPLACE REAR NO. 3 SPEAKER ASSEMBLY Click here

    OK

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