AUDIO AND VISUAL SYSTEM (w/o Multi-display) Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the stereo component amplifier assembly detects the short and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers.

WIRING DIAGRAM

A019OZFE02
A019O6SE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the O42 stereo component amplifier assembly connector.

    2. Disconnect the J2 and I3 front No. 1 speaker assembly connectors.

    3. Disconnect the J4 and I5 front No. 2 speaker assembly connectors.

    4. Disconnect the J6 and I6 front No. 3 speaker assembly connectors.

    5. Disconnect the L4 and K4 rear No. 1 speaker assembly connectors.

    6. Disconnect the H2 front No. 4 speaker assembly connector.

    7. Measure the resistance between each of the front No. 1 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      O42-5 (WFR+) - I3-1 Always Below 1 Ω
      O42-20 (WFR-) - I3-2 Always Below 1 Ω
      O42-4 (WFL+) - J2-1 Always Below 1 Ω
      O42-19 (WFL-) - J2-2 Always Below 1 Ω

    8. Measure the resistance between each of the front No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      O42-13 (FR+) - I5-1 (TWR+) Always Below 1 Ω
      O42-28 (FR-) - I5-2 (TWR-) Always Below 1 Ω
      O42-12 (FL+) - J4-1 (TWL+) Always Below 1 Ω
      O42-27 (FL-) - J4-2 (TWL-) Always Below 1 Ω

    9. Measure the resistance between each of the front No. 2 speaker assemblies and the front No. 3 speaker assemblies to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I5-3 (+) - I6-2 Always Below 1 Ω
      I5-4 (-) - I6-1 Always Below 1 Ω
      J4-3 (+) - J6-2 Always Below 1 Ω
      J4-4 (-) - J6-1 Always Below 1 Ω

    10. Measure the resistance between the front No. 4 speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      O42-7 (CTR+) - H2-2 Always Below 1 Ω
      O42-22 (CTR-) - H2-1 Always Below 1 Ω

    11. Measure the resistance between each of the rear No. 1 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      O42-15 (RR+) - K4-1 Always Below 1 Ω
      O42-30 (RR-) - K4-2 Always Below 1 Ω
      O42-14 (RL+) - L4-1 Always Below 1 Ω
      O42-29 (RL-) - L4-2 Always Below 1 Ω

    12. 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
      O42-13 (FR+) - Body ground Always 10 kΩ or higher
      O42-28 (FR-) - Body ground Always 10 kΩ or higher
      O42-12 (FL+) - Body ground Always 10 kΩ or higher
      O42-27 (FL-) - Body ground Always 10 kΩ or higher
      O42-5 (WFR+) - Body ground Always 10 kΩ or higher
      O42-20 (WFR-) - Body ground Always 10 kΩ or higher
      O42-4 (WFL+) - Body ground Always 10 kΩ or higher
      O42-19 (WFL-) - Body ground Always 10 kΩ or higher
      O42-7 (CTR+) - Body ground Always 10 kΩ or higher
      O42-22 (CTR-) - Body ground Always 10 kΩ or higher
      O42-15 (RR+) - Body ground Always 10 kΩ or higher
      O42-30 (RR-) - Body ground Always 10 kΩ or higher
      O42-14 (RL+) - Body ground Always 10 kΩ or higher
      O42-29 (RL-) - Body ground Always 10 kΩ or higher

    13. Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I5-3 (+) - Body ground Always 10 kΩ or higher
      I5-4 (-) - Body ground Always 10 kΩ or higher
      J4-3 (+) - Body ground Always 10 kΩ or higher
      J4-4 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. A019NQUE75
      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
        I3-1 - I3-2 Always 3.2 to 4.8 Ω
        J2-1 - J2-2 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. A019NGNE41
      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
        I5-1 (TWR+) - I5-2 (TWR-) Always 10 kΩ or higher
        I5-1 (TWR+) - I5-3 (+) Always Below 1 Ω
        I5-2 (TWR-) - I5-4 (-) Always Below 1 Ω
        J4-1 (TWL+) - J4-2 (TWL-) Always 10 kΩ or higher
        J4-1 (TWL+) - J4-3 (+) Always Below 1 Ω
        J4-2 (TWL-) - J4-4 (-) Always Below 1 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  4. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY


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

      OK
      Malfunction disappears.

      Tech Tips


      • 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 speaker is defective, inspect by interchanging the right one with the left one.

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


    NG

    INSPECT FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

  5. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


    1. A019OHEE21
      Text in Illustration
      *A for RH
      *B for LH
      *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
        I6-1 - I6-2 Always 3.2 to 4.8 Ω
        J6-1 - J6-2 Always 3.2 to 4.8 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

  6. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY


    1. A019OHEE22
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 4 Speaker Assembly)

      Resistance check


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        H2-1 - H2-2 Always 4.8 to 7.2 Ω

    NG

    REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Click here

    OK

  7. INSPECT REAR NO. 1 SPEAKER ASSEMBLY


    1. A019NQUE76
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Component without harness connected

      (Rear 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
        K4-1 - K4-2 Always 3.2 to 4.8 Ω
        L4-1 - L4-2 Always 3.2 to 4.8 Ω

    NG

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY Click here

    OK

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