AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit

DTC Code DTC Name
Speaker Circuit

DESCRIPTION

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

E287049E02

PROCEDURE

  1. CHECK SPEAKER (OPERATION CHECK)

    1. E268474

      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 RH or front No. 2 speaker assembly RH

      A

      Front No. 1 speaker assembly LH or front No. 2 speaker assembly LH

      B
      Tip:

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

    B

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

    A

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

    1. Disconnect the E31 radio and display receiver assembly connector.

    2. Disconnect the G3 front No. 1 speaker assembly RH connector.

    3. Disconnect the E1 front No. 2 speaker assembly RH connector.

    4. Measure the resistance between the front No. 2 speaker assembly RH and the radio and display receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E31-1 (FR+) - E1-4 (+)

      Always

      Below 1 Ω

      E31-5 (FR-) - E1-2 (-)

      Always

      Below 1 Ω

    5. Measure the resistance between the front No. 1 speaker assembly RH and the front No. 2 speaker assembly RH to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G3-1 - E1-3 (TWR+)

      Always

      Below 1 Ω

      G3-2 - E1-1 (TWR-)

      Always

      Below 1 Ω

    6. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E31-1 (FR+) - Body ground

      Always

      10 kΩ or higher

      E31-5 (FR-) - Body ground

      Always

      10 kΩ or higher

    7. Measure the resistance between the front No. 2 speaker assembly RH and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E1-3 (TWR+) - Body ground

      Always

      10 kΩ or higher

      E1-1 (TWR-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    INSPECT FRONT NO. 1 SPEAKER ASSEMBLYClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the E31 radio and display receiver assembly connector.

    2. Disconnect the H3 front No. 1 speaker assembly LH connector.

    3. Disconnect the E44 front No. 2 speaker assembly LH connector.

    4. Measure the resistance between the front No. 2 speaker assembly LH and the radio and display receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E31-2 (FL+) - E44-4 (+)

      Always

      Below 1 Ω

      E31-6 (FL-) - E44-2 (-)

      Always

      Below 1 Ω

    5. Measure the resistance between the front No. 1 speaker assembly LH and the front No. 2 speaker assembly LH to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H3-1 - E44-3 (TWL+)

      Always

      Below 1 Ω

      H3-2 - E44-1 (TWL-)

      Always

      Below 1 Ω

    6. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E31-2 (FL+) - Body ground

      Always

      10 kΩ or higher

      E31-6 (FL-) - Body ground

      Always

      10 kΩ or higher

    7. Measure the resistance between the front No. 2 speaker assembly LH and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E44-3 (TWL+) - Body ground

      Always

      10 kΩ or higher

      E44-1 (TWL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

    1. Remove the front No. 1 speaker assembly.

      Click here

    2. E219303C30

      *a

      Component without harness connected

      (Front No. 1 Speaker Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 2

      Always

      3.2 to 4.8 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

    Click here

    OK

  5. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

    1. Remove the front No. 2 speaker assembly.

      Click here

    2. E226097C39

      *A

      for RH

      *B

      for LH

      *a

      Component without harness connected

      (Front No. 2 Speaker Assembly)

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

      Standard Resistance (for RH)

      Tester Connection

      Condition

      Specified Condition

      4 (+) - 2 (-)

      Always

      10 kΩ or higher

      3 (TWR+) - 4 (+)

      Always

      Below 1 Ω

      1 (TWR-) - 2 (-)

      Always

      Below 1 Ω

      Standard Resistance (for LH)

      Tester Connection

      Condition

      Specified Condition

      4 (+) - 2 (-)

      Always

      10 kΩ or higher

      3 (TWL+) - 4 (+)

      Always

      Below 1 Ω

      1 (TWL-) - 2 (-)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    Click here

    OK

  6. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    1. Check that the malfunction disappears when a known good speaker is installed.

      Click here

      OK

      Malfunction disappears.

      Tip:

      • 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 No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both the LH and RH side.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here