AUDIO AND VISUAL SYSTEM(for 7 Inch Display) 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.

WIRING DIAGRAM

B004F7QE22

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

    Click here

PROCEDURE


  1. CHECK SPEAKER (OPERATION CHECK)


    1. B004FWP

      Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check.

      Click here

    2. Perform the operation check above and determine the speaker that is not operating.

      Result
      Not operating speaker Proceed to
      Front No. 1 speaker assembly A
      Front No. 2 speaker assembly B
      Rear speaker assembly C

      Tech Tips

      If sound cannot be heard from any speaker, inspect all of them.


    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - RADIO SETTING CONDENSER - FRONT NO. 2 SPEAKER ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY) Click here

    A

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


    1. Disconnect the O149 radio receiver assembly connector.

    2. Disconnect the R14 and S14 front No. 1 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O149-1 (FR+) - R14-1 Always Below 1 Ω
      O149-6 (FR-) - R14-2 Always Below 1 Ω
      O149-2 (FL+) - S14-1 Always Below 1 Ω
      O149-7 (FL-) - S14-2 Always Below 1 Ω
      O149-1 (FR+) or R14-1 - Body ground Always 10 kΩ or higher
      O149-6 (FR-) or R14-2 - Body ground Always 10 kΩ or higher
      O149-2 (FL+) or S14-1 - Body ground Always 10 kΩ or higher
      O149-7 (FL-) or S14-2 - 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

    OK

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

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

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


    1. Disconnect the O149 radio receiver assembly connector.

    2. Disconnect the O67 radio setting condenser connector.

    3. Disconnect the O54 and O55 front No. 2 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O149-1 (FR+) - O67-3 (RIN) Always Below 1 Ω
      O149-6 (FR-) - O67-6 (ROUT) Always Below 1 Ω
      O149-2 (FL+) - O67-1 (LIN) Always Below 1 Ω
      O149-7 (FL-) - O67-2 (LOUT) Always Below 1 Ω
      O67-8 (RI+) - O54-2 Always Below 1 Ω
      O67-7 (RI-) - O54-1 Always Below 1 Ω
      O67-4 (LI+) - O55-2 Always Below 1 Ω
      O67-5 (LI-) - O55-1 Always Below 1 Ω
      O149-1 (FR+) or O67-3 (RIN) - Body ground Always 10 kΩ or higher
      O149-6 (FR-) or O67-6 (ROUT) - Body ground Always 10 kΩ or higher
      O149-2 (FL+) or O67-1 (LIN) - Body ground Always 10 kΩ or higher
      O149-7 (FL-) or O67-2 (LOUT) - Body ground Always 10 kΩ or higher
      O67-7 (RI-) or O54-1 - Body ground Always 10 kΩ or higher
      O67-8 (RI+) or O54-2 - Body ground Always 10 kΩ or higher
      O67-5 (LI-) or O55-1 - Body ground Always 10 kΩ or higher
      O67-4 (LI+) or O55-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. Remove the front No. 2 speaker assembly.

      Click here

    2. Inspect the front No. 2 speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  6. REPLACE RADIO SETTING CONDENSER


    1. Check that the malfunction disappears when a new or known good radio setting condenser is installed.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

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

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)


    1. Disconnect the O149 radio receiver assembly connector.

    2. Disconnect the T25 and U35 rear speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O149-4 (RR+) - T25-1 Always Below 1 Ω
      O149-9 (RR-) - T25-2 Always Below 1 Ω
      O149-3 (RL+) - U35-1 Always Below 1 Ω
      O149-8 (RL-) - U35-2 Always Below 1 Ω
      O149-4 (RR+) or T25-1 - Body ground Always 10 kΩ or higher
      O149-9 (RR-) or T25-2 - Body ground Always 10 kΩ or higher
      O149-3 (RL+) or U35-1 - Body ground Always 10 kΩ or higher
      O149-8 (RL-) or U35-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. 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