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

DESCRIPTION


WIRING DIAGRAM

A01EVUHE31

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SPEAKER (OPERATION CHECK)


    1. A01EXQJ

      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
      Result Proceed to
      Front No. 1 speaker assembly or front No. 2 speaker assembly A
      Rear speaker assembly B

      Tech Tips

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


    B

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

    A

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT SPEAKER)


    1. Disconnect the I152 radio and display receiver assembly connector.

    2. Disconnect the I83 and I1 front No. 2 speaker assembly connectors.

    3. Disconnect the J5 and K5 front No. 1 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I152-1 (FR+) - I83-4 (TWR+) Always Below 1 Ω
      I152-5 (FR-) - I83-2 (TWR-) Always Below 1 Ω
      I152-2 (FL+) - I1-4 (TWL+) Always Below 1 Ω
      I152-6 (FL-) - I1-2 (TWL-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I83-3 (+) - J5-1 Always Below 1 Ω
      I83-1 (-) - J5-2 Always Below 1 Ω
      I1-3 (+) - K5-1 Always Below 1 Ω
      I1-1 (-) - K5-2 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
      I152-1 (FR+) - Body ground Always 10 kΩ or higher
      I152-5 (FR-) - Body ground Always 10 kΩ or higher
      I152-2 (FL+) - Body ground Always 10 kΩ or higher
      I152-6 (FL-) - Body ground Always 10 kΩ or higher

    7. 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
      I83-3 (+) - Body ground Always 10 kΩ or higher
      I83-1 (-) - Body ground Always 10 kΩ or higher
      I1-3 (+) - Body ground Always 10 kΩ or higher
      I1-1 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. Remove the front No. 2 speaker assembly Click here.

    2. A01EU3JE52
      Text in Illustration
      *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
      Tester Connection Condition Specified Condition
      4 (TWR+) - 2 (TWR-) Always 10 kΩ or higher
      1 (-) - 2 (TWR-) Always Below 1 Ω
      3 (+) - 4 (TWR+) Always Below 1 Ω
      4 (TWL+) - 2 (TWL-) Always 10 kΩ or higher
      1 (-) - 2 (TWL-) Always Below 1 Ω
      3 (+) - 2 (TWL+) 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 new or 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 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.


    NG

    INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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

    2. A01EY2CE07
      Text in Illustration
      *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

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

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

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


    1. Disconnect the I153 radio and display receiver assembly connector.

    2. Disconnect the O18 and O21 rear speaker assembly connectors.

    3. Measure the resistance between each of the rear speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I153-1 (RR+) - O18-1 Always Below 1 Ω
      I153-3 (RR-) - O18-2 Always Below 1 Ω
      I153-2 (RL+) - O21-1 Always Below 1 Ω
      I153-6 (RL-) - O21-2 Always Below 1 Ω

    4. 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
      I153-1 (RR+) - Body ground Always 10 kΩ or higher
      I153-3 (RR-) - Body ground Always 10 kΩ or higher
      I153-2 (RL+) - Body ground Always 10 kΩ or higher
      I153-6 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly Click here.

    2. A01EY2CE08
      Text in Illustration
      *a

      Component without harness connected

      (Rear 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

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

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