AUDIO AND VISUAL SYSTEM(w/o Multi-display), Diagnostic DTC:74-40

DTC Code DTC Name
74-40 Short in Speaker Circuit

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

DTC No. DTC Detection Condition Trouble Area
74-40 A short is detected in the speaker output circuit.

  • Wire harness or connector

  • Speaker

  • Stereo component amplifier assembly

WIRING DIAGRAM

A0004IKE02
A0004QCE24

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the H88 stereo component amplifier assembly connector.

    2. Disconnect the L6 and M5 front No. 1 speaker assembly connectors.

    3. Disconnect the H63 and H62 front No. 2 speaker assembly connectors.

    4. Disconnect the O6 and N6 rear speaker assembly connectors.

    5. Disconnect the J2 front No. 3 speaker assembly connector.

    6. Disconnect the Q16 stereo component speaker assembly connector.

    7. Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H88-13 (FR+) - Body ground Always 10 kΩ or higher
      H88-28 (FR-) - Body ground Always 10 kΩ or higher
      H88-12 (FL+) - Body ground Always 10 kΩ or higher
      H88-27 (FL-) - Body ground Always 10 kΩ or higher
      H88-5 (WFR+) - Body ground Always 10 kΩ or higher
      H88-20 (WFR-) - Body ground Always 10 kΩ or higher
      H88-4 (WFL+) - Body ground Always 10 kΩ or higher
      H88-19 (WFL-) - Body ground Always 10 kΩ or higher
      H88-7 (CTR+) - Body ground Always 10 kΩ or higher
      H88-22 (CTR-) - Body ground Always 10 kΩ or higher
      H88-15 (RR+) - Body ground Always 10 kΩ or higher
      H88-30 (RR-) - Body ground Always 10 kΩ or higher
      H88-14 (RL+) - Body ground Always 10 kΩ or higher
      H88-29 (RL-) - Body ground Always 10 kΩ or higher
      H88-6 (WF1+) - Body ground Always 10 kΩ or higher
      H88-21 (WF1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. A0003NWE02
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Component without harness connected

      (Front No. 1 Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        L6-1 - L6-2 Always 3.2 to 4.8 Ω
        M5-1 - M5-2 Always 3.2 to 4.8 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. A0008URE02
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Component without harness connected

      (Front No. 2 Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        H63-1 - H63-2 Always 3.2 to 4.8 Ω
        H62-1 - H62-2 Always 3.2 to 4.8 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  4. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


    1. A000893E02
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 3 Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J2-1 - J2-2 Always 4.0 to 6.0 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

  5. INSPECT REAR SPEAKER ASSEMBLY


    1. A0007MHE02
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Component without harness connected

      (Rear Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N6-1 - N6-2 Always 3.2 to 4.8 Ω
        O6-1 - O6-2 Always 3.2 to 4.8 Ω

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  6. INSPECT STEREO COMPONENT SPEAKER ASSEMBLY


    1. A0003LCE02
      Text in Illustration
      *a

      Component without harness connected

      (Stereo Component Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q16-1 - Q16-2 Always 2.0 to 3.0 Ω

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    NG

    REPLACE STEREO COMPONENT SPEAKER ASSEMBLY Click here